Adding a certain compound to certain chemical reactions, such as: 61881-19-4, name is 2,2,2-Trifluoro-N-phenylacetimidoyl chloride, belongs to chlorides-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 61881-19-4, Recommanded Product: 2,2,2-Trifluoro-N-phenylacetimidoyl chloride
In a flask with a dry inert atmosphere are introduced 260 ml of anhydrous THF, it is cooled to -78C and 225 ml are added of LDA 2M solution in THF/n-heptane at a rate allowing to maintain the temperature under -65C. After this diethylmethylphosphonate (34.25 g, 0.225 mol) is quickly added dropwise dissolved in 30 ml of THF and it is shaken for 30 minutes at -78C. N-phenyltrifluoroacetymidoyl chloride is then added dropwise (46.7 g, 0.225 mol) dissolved in 40 ml of THF and it is left with shaking in the same conditions for 1 hour. A solution is added of 2,4-difluorobenzaldehyde (33.6 g, 0.236 mol) in 40 ml of THF, the cold bath is removed and the temperature is allowed to rise to ambient temperature. It is left shaking overnight in these conditions. The following morning 450 ml of HCl 2N are added and the shaking continued for 24 hours. The THF is removed in the rotovapor and the resulting aqueous solution is extracted with AcOEt ( 2×200 ml), washed with a solution of 5% NaHCO3 and with a saturated NaCl solution, it is dried with sodium sulphate, filtered and the solvent evaporated with the rotovapor. In this way are obtained 54.6 g of a reddish liquid crude that solidifies. The crude is distilled at a pressure of 35 mbar and a fraction is collected of (E)-1,1,1-trifluoro-4-(2,4-difluorophenyl)-3-buten-2-one at 107-14C (43 g, 81%). Melting point : 50-1C IR (KBr, cm-1) : 1717, 1602, 1583, 1277, 1146, 1059, 7061H-RMN (CDCl3) : 6,9 (m, 2H), 7.05 (d, J=16 Hz, 1H), 7,6 (m, 1H), 8.0 (d, J=16Hz, 1H)13C-RMN (CDCl3): 105.1 (t,J=26Hz), 112,6(dd, J=4, 22Hz) , 116.4 (q, J=291Hz), 118.2, 118.5, 131.5 (dd, J=4, 11Hz), 141.5, 162.5 (dd, J=13, 193Hz), 165,7 (dd, J=13, 190Hz), 180 (q, J=36Hz)
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Reference:
Patent; LABORATORIOS DEL DR. ESTEVE, S.A.; EP1384477; (2004); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics