Category: chlorides-buliding-blocks

Yabe, Osamu published the artcileA convergent scale-up synthesis of a HER2/EGFR dual kinase inhibitor, Quality Control of 350-30-1, the publication is Heterocycles (2017), 94(4), 702-715, database is CAplus.

A practical and scalable synthesis of the human epidermal growth factor receptor 2 (HER2)/epidermal growth factor receptor (EGFR) dual kinase inhibitor I has been developed. The key features of the process development include convenient construction of the benzisothiazole skeleton directly from com. available materials in high yield, a practical O-demethylation utilizing an ethanethiol or octanethiol/aluminum chloride system without harsh conditions, and development of a more convergent alternative route that coupled two key intermediates in the final step. The novel synthesis allowed the manufacturing process to produce high quality API I (>99% purity (LCAP)) over 7 steps, compared to 9 steps in the original route, without chromatog. purification

Heterocycles published new progress about 350-30-1. 350-30-1 belongs to chlorides-buliding-blocks, auxiliary class Fluoride,Chloride,Nitro Compound,Benzene, name is 3-Chloro-4-fluoronitrobenzene, and the molecular formula is C10H10O2, Quality Control of 350-30-1.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Arai, Junya published the artcileChemoprevention for Colorectal Cancers: Are Chemopreventive Effects Different Between Left and Right Sided Colorectal Cancers?, Application In Synthesis of 637-07-0, the publication is Digestive Diseases and Sciences, database is CAplus and MEDLINE.

Recent studies have suggested that right- and left-sided colorectal cancers (CRCs) are molecularly distinct. In this study, we examined the association between the risk of right- and left-sided CRC and drug use to estimate their chemopreventive effects .This multicenter retrospective cohort study was conducted using the data of hospitalized patients between 2014 and 2019 from nine hospital databases. The primary outcomes were right- and left-sided CRC. We evaluated the association of CRCs with drug use and clin. factors. Odds ratios adjusted for age, sex, Charlson Comorbidity Index scores, and smoking status were calculated We also compared the transcriptional profiling in precancerous lesions, including sessile serrated lesions (SSLs). A total of 307,938 patients, including 2745 with right-sided CRC and 4819 with left-sided CRC, were analyzed. The use of nonsteroidal anti-inflammatory drugs (NSAIDs), aspirin, cyclooxygenase-2 inhibitors, and steroids was associated with a lower risk of both right- and left-sided CRCs. In contrast, statins, other lipid-lowering agents, and metformin were associated with a lower risk of left-sided CRC. Transcriptomic anal. showed that SSL, which predominantly develops in the right colon, was associated with a lower expression of lipid metabolism-related genes. Targeting lipid metabolism may be useful for chemoprevention of left-sided CRCs, while development of right-sided CRCs may be independent of this pathway.

Digestive Diseases and Sciences published new progress about 637-07-0. 637-07-0 belongs to chlorides-buliding-blocks, auxiliary class Inhibitor,Cell Cycle,PPAR, name is Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate, and the molecular formula is C12H15ClO3, Application In Synthesis of 637-07-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Schroeter, G. published the artcileHydrogenated naphthalenes and their transformations. III. Tetrahydronaphthalenesulfonic acids, tetrahydronaphthols and their derivatives, HPLC of Formula: 61551-49-3, the publication is Justus Liebigs Annalen der Chemie (1922), 83-160, database is CAplus.

2-Tetralinsulfonic acid (tetrahydronaphthalene-2-sulfonic acid),formed by the action of concentrated H₂SO₄ upon C₁₀H₁₂, seps. with 2 H₂O from H₂SO₄, m. 75°. Sodium salt, glistening leaflets with 1 H₂O; barium salt, leaflets; lead salt,with 1 H₂O, small leaflets. Ammonium salt, glistening leaflets Chloride, plates, b₁₈ 197-200°, m. 58°. With NH₃ it yields the amide, m. 135-7°, and with PhNH₂, the anilide, m. 155-6°. The mixture of acids obtained when the sulfonation is carried out with ClSO₃H may be separated by crystallization of the acids from CHCl₃, the 1-acid separating first, or by precipitating the Pb salt of the 1-acid with Pb(OAc)₂ or by crystallizing the 2-amide from NaOH. 1-Tetralinsulfonic acid: lead salt, glistening leaflets with 3H₂O; sodium salt, leaflets with 2 H₂O, and barium salt, 3 H₂O. Amide, leaflets, m. 139-40°;chloride, m. 70-2°; anilide, m. 148-9°. Upon reduction of the chloride mixture with Zn dust, the tetralylthiols result. 2-Tetralylthiolacetic acid, by the reaction of ClCH₂CO₂Na upon C₁₀H₁₁SNa, needles, m. 78-80°. Ammonium salt, glistening leaflets. Concentrated H₂SO₄gives a greenish yellow color; on boiling the dilute solution and making alk. with NaOH, sodium bis-ar-tetrahydrothionaphthenedisulfonate is precipitated as fine steel-blue needles with Cu luster. The 1-thiolacetic acid crystallizes in glistening plates, m. 133-5°. Whenα-C₁₀H₇OH is reduced with H at 200°in the presence of Ni, the product consists of about 10% ofα-ketotetrahydronaphthalene, 25-30 %C₁₀H₁₁OH and a large quantity of C₁₀H₁₂. At low temperatures the ketone is the main product. In the reduction of the ketone with Na and EtOH, it yields ac-C₁₀H₁₁OH. ac-β-C₁₀H₁₁OH is the principal product of the catalytic reduction of β-C₁₀H₇OH. The SO₃H acids are therefore valuable starting points in the production of C₁₀H₁₁OH, which are formed by fusion with alkalies. These are called tetralols. 2-Tetralolmethyl ether, by the action of Me₂SO₄ in NaOH, b₁₁ 129-31°; acetate, rather viscous oil,b₁₄ 158°; benzoate, prisms, b₁₀220-2°, m. 96°. 2-Tetralol-3-sulfonic acid, by warming in concentrated H₂SO₄ until soluble in H₂O,needles, with 2 H₂O, m. 92°. The sodium and barium salts are difficultly soluble With diazo solutions it couples to form strongly colored azo dyes. Methoxy derivative, from C₁₀H₁₁OMe and concentrated H₂SO₄, m. 107°. 1-Bromo-2-tetralol, by the direct action of Br in CCl₄, b₁₃160°, m. 74°; also prepared by desulfonation of 1-bromo-2-tetralol-3-sulfonic acid (sodium salt, with 3H₂O) with HCl. This has a greater toxic effect upon bacteria than lysol or PhOH. 1,3-Dibromo-2-tetralol,b₁₂ 198-201°, m. 37°. Acetate, m. 87°, is the best means of purification. 1-Bromo-3-nitro-2-tetralol, by the action of HNO₃ on the SO₃H derivative, long yellow needles, m. 129°. Sodium salt, glistening red leaflets,which color wool a light orange shade. Methyl ether, yellow needles, m. 64°. 1-Chloro-3-nitro-2-tetralol, yellow needles,m. 96°. 1-Bromo-3-amino-2-tetralol, by reduction of the NO₂ derivative with SnCl₂ in Et₂O saturated with HCl, fine needles, m. 127° (hydrochloride, sulfate and nitrate sparingly soluble in cold H₂O); methyl ether,isolated as the sulfate, long needles with 4 H₂O. 3-Amino-2-tetralol (A) is also formed in the above reduction and forms leaflets, m. 202°. Its hydrochloride and nitrate are easily soluble in H₂O, while the sulfate is difficultly soluble Carbonyl-3,2-aminotetralol,C₁₀H₁₀.NH.CO.O by heating the azide in C₇H₈, m. 196°, also forms A when heated with concentrated HCl in a sealed tube. With piperonal A gives piperonylidene-3,2-aminotetratol, yellow, m. 160°; with alk. Me₂SO₄ it yields piperonylidene-3,2-aminotetralol methyl ether, m. 120°. With dilute HCl this yields the methyl ether of A, large leaflets, m.86°. 1-Amino-2-tetralol (B), obtained by coupling 2-C₁₀H₁₁OH with sulfanilic acid diazide and reducing with SnCl₂ or from 1-benzeneazo-2-tetralol(red, m. 84°; monobromo derivative m. 204°) with Na₂S₂O₄, leaflets, m. 148°. An isomer, m. 173°, is sometimes obtained which gives a carbonyl-aminotetralol, red needles, m. 188°. Carbonyl-1-amino-2-tetralol, m. 189-90°. Methyl ether of B, m.64°, is obtained by reducing 1,2-O₂NC₁₀H₆OMe with SnCl₂, isolating the product and reducing this with Na and AmOH, and yields B upon heating with HCl in a sealed tube. 1,3-Nitrotetralinsulfonic acid, obtained by the action of concentrated H₂SO₄ on 1-C₁₀H₁₁NO₂, forms an amide m.189°, and upon reduction with SnCl₂ and excess of HCl, or Fe and HCl, gives 1-aminotetralin-3-sulfonic acid (C),leaflets. When a mixture of the 1- and 2-NO₂ derivatives is sulfonated, 2-nitrotetralin-4-sulfonic acid is also formed, the amide of which m. 211-2°, and which yields 2-aminotetralin-4-sulfonic acid on reduction, the hydrochloride of which is soluble in 120 parts H₂O. The action of alkalies on C gives, as the main product, AcNHC₁₀H₁₁. 4-Acetamino-2-tetralol is obtained by heating the diazo solution from 4,2-AcNHC₁₀H₁₀NH₂, m. 222°,and, on saponification, gives 4-amino-2-tetralol, leaflets, m. 177°. 1,3-Dinitro-2-tetralol, pale yellow needles, m. 141°. Sodium salt, orange-yellow; potassium salt, orange-yellow; ammonium salt,citron-yellow; barium and lead salts. The 1st 2 salts change color on heating and explode at 180-90°, while the last 3 do not change color and burn quietly on heating. Methyl ether (D), from MeNaSO₄ and(O₂N)₂C₁₀H₉ONa in C₇H₈, needles, m. 86.5°. Reduced with SnCl₂ in Et₂O, 1-nitro-3-amino-2-tetralol results, Cu-colored needles, m. 127°. Hydrochloride, pale yellow leaflets. Methyl ether, by the reduction of D, yellow leaflets, m. 117°. Hydrochloride, sparingly soluble in HCl, but decomposed by H₂O. Reduced with SnCl₂ in EtOH,1,3-diamino-2-tetralol is formed, leaflets, m. 214-6°. Methyl ether, prisms, m. 89°. Heated under pressure with CO₂ in the presence of alkalies,2-C₁₀H₁₁OH gives 2,3-tetralsalicylic acid, m.182°; sodium and calcium salts. Methyl ester, b₁₅179°, m. 42°. Ethyl ester, b₁₃ 179°. 2-Tetralol-3-carbonic hydrazide, m. 146°. Acetonehydrazone, m.235°. Azide, long needles, m. 99-100°. Anilide, m.182-4°. 2,3-Acetyltetralol-carboxylic acid, m. 142-3°. 1-Nitro-2-tetralol-3-carboxylic acid, yellow needles, m.200-2°, which may be reduced to the 1-amino derivative, prisms,m. 208-10°; the hydrochloride is sparingly soluble in HCl and the diacetate m. 180-1°. 4-Amino-1-tetralol, needles m. 146-7°, may be obtained by reducing p-ONC₁₀H₁₀OH with SnCl₂, or 1-tetralol-4-azobenzene-4′-sulfonic acid, red dye, by means of alk. Na₂S₂O₄. Ethyl ether (Ber. 31, 898), by reduction of EtOC₁₀H₁₀N₂ Ph with H, m. 60°,and gives p-ethoxytetralylurea, m. 240-1°. 2-Amino-1-tetralol, m. 110-1°, gives with urea an oxazolone, m. 205°. 3-Acetamino-1-tetralol, from the diazo compound, needles, m.211°. 3-Amino-1-tetralol, leaflets, m. 197°;hydrochloride, needles. With K₂CO₃ and CO₂ this gives 1,2-tetralsalicylic acid, m. 165-6°,the sodium salt of which crystallizes as leaflets with 3H₂O. Acetate, m. 170°. Methyl ester,b₁₆ 190°, m. 56°. Hydrazide, long needles, m.205°. Acetonehydrazone, m. 136°. Azide, m. 84°.

Justus Liebigs Annalen der Chemie published new progress about 61551-49-3. 61551-49-3 belongs to chlorides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 5,6,7,8-Tetrahydronaphthalene-2-sulfonyl chloride, and the molecular formula is C10H11ClO2S, HPLC of Formula: 61551-49-3.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Pare, Brijesh published the artcileMineralization of Methylene violet dye using titanium dioxide in presence of visible light, Formula: C22H23ClN4, the publication is International Journal of Chemical Sciences (2011), 9(4), 1685-1697, database is CAplus.

Advanced oxidation processes are eco-friendly methods of destroying organic pollutants by using semiconductor and visible light. Photocatalytic degradation of Methylene violet has been investigated in aqueous heterogeneous suspension. The results indicated that photocatalytic reaction was enhanced in alk. medium. The degradation of dye depends on several parameters such as initial concentration of the dye, catalyst loading, pH, electron acceptors and light intensity. COD removal was measured at regular intervals to quantify the mineralization of methylene violet. Sunlight has also been effectively used to degrade Methylene violet.

International Journal of Chemical Sciences published new progress about 4569-86-2. 4569-86-2 belongs to chlorides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is 3-Amino-7-(diethylamino)-5-phenylphenazin-5-ium chloride, and the molecular formula is C22H23ClN4, Formula: C22H23ClN4.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Koronkiewicz, Brian published the artcileShallow distance dependence for proton-coupled tyrosine oxidation in oligoproline peptides, Application In Synthesis of 42074-68-0, the publication is Journal of the American Chemical Society (2020), 142(28), 12106-12118, database is CAplus and MEDLINE.

We have explored the kinetic effect of increasing electron transfer (ET) distance in a biomimetic, proton-coupled electron-transfer (PCET) system. Biol. ET often occurs simultaneously with proton transfer (PT) in order to avoid the high-energy, charged intermediates resulting from the stepwise transfer of protons and electrons. These concerted proton-electron-transfer (CPET) reactions are implicated in numerous biol. ET pathways. In many cases, PT is coupled to long-range ET. While many studies have shown that the rate of ET is sensitive to the distance between the electron donor and acceptor, extensions to biol. CPET reactions are sparse. The possibility of a unique ET distance dependence for CPET reactions deserves further exploration, as this could have implications for how we understand biol. ET. We therefore explored the ET distance dependence for the CPET oxidation of tyrosine in a model system. We prepared a series of metallopeptides with a tyrosine separated from a Ru(bpy)₃²⁺ complex by an oligoproline bridge of increasing length. Rate constants for intramol. tyrosine oxidation were measured using the flash-quench transient absorption technique in aqueous solutions The rate constants for tyrosine oxidation decreased by 125-fold with three added proline residues between tyrosine and the oxidant. By comparison, related intramol. ET rate constants in very similar constructs were reported to decrease by 4-5 orders of magnitude over the same number of prolines. The observed shallow distance dependence for tyrosine oxidation is proposed to originate in part from the requirement for stronger oxidants, leading to a smaller hole-transfer effective tunneling barrier height. The shallow distance dependence observed here and extensions to distance-dependent CPET reactions have potential implications for long-range charge transfers.

Journal of the American Chemical Society published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, Application In Synthesis of 42074-68-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Kavitha, K. published the artcileAn expedient one-pot tandem method for the synthesis of 3-(2-(phenylamino)thiazol-4-yl)-2H-chromen-2-ones under green conditions, Name: 1-(4-Chlorophenyl)thiourea, the publication is Journal of the Iranian Chemical Society (2019), 16(9), 1913-1921, database is CAplus.

This paper describes a facile pathway for the one-pot three-component synthesis of 3-(2-(phenylamino)thiazol-4-yl)-2H-chromen-2-ones starting from ethyl-4-chloroacetoacetate by treating it with equimolar amounts of various phenylthioureas and salicylaldehyde. Use of biosynthetically prepared L-proline as an efficient catalyst and naturally extracted renewable polyethylene glycol-600 (PEG-600) as an effective green reaction media are the added advantages of this method. Alternatively, tandem, stepwise methods have been proposed to isolate the intermediate and to study the possible reaction mechanism. These reactions are very simple, rapid, cost effective, industrially viable, which would be applied for various biomass conversions.

Journal of the Iranian Chemical Society published new progress about 3696-23-9. 3696-23-9 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Thiourea,Amine,Benzene,Amide, name is 1-(4-Chlorophenyl)thiourea, and the molecular formula is C7H7ClN2S, Name: 1-(4-Chlorophenyl)thiourea.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Kavitha, Kotthireddy published the artcileAn unusual synthesis of 3-(2-(arylamino)thiazol-4-yl)-2H-chromen-2-ones from ethyl 2-(chloromethyl)-2-hydroxy-2H-chromene-3-carboxylate via benzopyran ring opening, HPLC of Formula: 3696-23-9, the publication is Molecular Diversity (2019), 23(2), 443-452, database is CAplus and MEDLINE.

An unusual and unexpected synthesis of 3-(2-(arylamino)thiazol-4-yl)-2H-chromen-2-ones was observed by the reaction of Et 2-(chloromethyl)-2-hydroxy-2H-chromene-3-carboxylate with various arylthioureas in ethanol under mild reaction conditions with excellent yields. The ambiguity in the structure of the obtained products was solved by recording its single-crystal X-ray anal. This protocol was found to be a novel approach for the preparation of title compounds via benzopyran ring opening. A systematic plausible mechanism was proposed for the formation of the product. Also, an efficient one-pot three-component method was demonstrated for the formation of title compounds starting from salicylaldehyde.

Molecular Diversity published new progress about 3696-23-9. 3696-23-9 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Thiourea,Amine,Benzene,Amide, name is 1-(4-Chlorophenyl)thiourea, and the molecular formula is C7H7ClN2S, HPLC of Formula: 3696-23-9.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Parvathy, Kattera S. published the artcileUltrasound-assisted reaction of 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide with potassium salt of curcumin under PTC conditions, Application In Synthesis of 23616-79-7, the publication is Ultrasonics Sonochemistry (2008), 15(4), 571-577, database is CAplus and MEDLINE.

Reaction of 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide with potassium salt of curcumin [bis-1,7-(3′-methoxy-4′-hydroxy)phenyl-5-hydroxy-1,4,6-heptatrien-3-one] under either thermal or high pressure conditions affect the labile substrate, curcumin, thus resulting in drastic reduction in the yields of the glucosides. This drawback could be effectively overcome by carrying out the biphasic reaction in the presence of a phase transfer catalyst under the effect of ultrasound. The reaction under the sonochem. conditions was faster and resulted in the increased yield of the glucoside products. The reaction was investigated in detail with a view to optimizing the yield of the glucosides. The detailed study clearly indicated the important role of the nature and quantity of the phase transfer catalyst employed in the reaction. Also, the selectivity with respect to the formation of mono- or di-β-glucosides under both mono- and biphasic reaction conditions was clearly discernable. The study establishes a simple synthetic protocol for the glucoside derivatives of curcumin in high yields and selectivity using ultrasonic waves.

Ultrasonics Sonochemistry published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Application In Synthesis of 23616-79-7.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Khare, R. K. published the artcileSynthesis and fungicidal activity of some 5-methylene-2-[5′-aryl-1′,3′,4′-oxa(thia)diazol-2′-yl]amino-4-thiazolones, Computed Properties of 18791-02-1, the publication is Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry (1995), 34B(9), 828-31, database is CAplus.

N¹-(5-aryl-1,3,4-oxa(thia)diazol-2-yl)thioureas undergo regioselective cyclocondensation with 2,3-dibromopropionyl chloride to give 5-methylene-2-[5′-aryl-1′,3′,4′-oxa(thia)diazol-2′-yl]amino-4-thiazolones. These thiazolones have been tested in vitro for their antifungal activity against Aspergillus niger and Fusarium oxysporium and results compared with their parent thioureas. Attempts have also been made to correlate structural features of tested compounds with their activity.

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry published new progress about 18791-02-1. 18791-02-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is 2,3-Dibromopropionylchloride, and the molecular formula is C3H3Br2ClO, Computed Properties of 18791-02-1.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Mishra, Anu published the artcileVisible light triggered, catalyst free approach for the synthesis of thiazoles and imidazo[2,1-b]thiazoles in EtOH : H₂O green medium, Related Products of chlorides-buliding-blocks, the publication is RSC Advances (2016), 6(54), 49164-49172, database is CAplus.

The development of a visible light promoted, mild and greener approach for the synthesis of highly functionalized thiazoles and imidazo[2,1-b]thiazoles under photochem. activation in EtOH : H₂O green medium was demonstrated. The characteristic feature of the present protocol was the utilization of visible light (an omnipresent, nontoxic, environmentally benign and inexpensive reagent) to form C-S and C-N bonds and circumvent the use of catalysts or photosensitizers. The reported protocol was the first example of visible light promoted synthesis of thiazoles and imidazo[2,1-b]thiazoles with various attractive features like being catalyst free, eco-efficient and possessing cost effectiveness, short reaction time, excellent yields and sustainability to fulfill the parameters of green chem.

RSC Advances published new progress about 3696-23-9. 3696-23-9 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Thiourea,Amine,Benzene,Amide, name is 1-(4-Chlorophenyl)thiourea, and the molecular formula is C7H7ClN2S, Related Products of chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics