27139-97-5, Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 27139-97-5, name is 2-Bromo-4-chloro-1-methylbenzene, A new synthetic method of this compound is introduced below.
Step 1 Ethyl (E)-3-(5-chloro-2-methylphenyl)-2-propenoate To 2-bromo-4-chloro toluene (20.0 g; 97.3 mmol) in 300 mL of THF at -78¡ã C. was added n-BuLi 2.5M (40.8 mL) dropwise. After 20 min. 1-formylpiperidine (11.4 mL; 103.0 mmol) in 10 mL of THF was added dropwise. After 30 min the reaction mixture was brought to 0¡ã C. and quenched with HCl (10percent) and diluted with EtOAc. The organic phase was collected, dry and the solvent evaporated to yield 13.3 g (89percent) of 5-chloro-2-methylbenzaldehyde.
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Patent; Merck Frosst Canada & Co.; US6242493; (2001); B1;,
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