申请人:Nippon Soda Co., Ltd.
公开号:US20170226046A1
公开(公告)日:2017-08-10
The present invention provides a method for producing a benzaldehyde in which an amino group is bonded in the 2 position, a halogeno group or an alkoxy group is bonded in the 3 position, and a hydrogen atom, an alkyl group, a halogeno group, an alkoxy group, or a cyano group is bonded independently in each of the 4, 5, and 6 positions, the method including: preparing a benzaldehyde in which a halogeno group or an alkoxy group is bonded in the 3 position, a hydrogen atom is bonded in the 2 position, and a hydrogen atom, an alkyl group, a halogeno group, an alkoxy group, or a cyano group is bonded independently in each of the 4, 5, and 6 positions so that a lithiation reaction is most active at the 2 position; acetal-protecting a formyl group in the benzaldehyde; sequentially performing lithiation, azidation, and amination of the 2 position; and the performing acetal deportection.
本发明提供了一种生产
苯甲醛的方法,其中
氨基与2位键合,卤素基或烷氧基与3位键合,氢原子、烷基、卤素基、烷氧基或
氰基分别与4、5和6位键合,所述方法包括:制备
苯甲醛,其中卤素基或烷氧基与3位键合,氢原子与2位键合,氢原子、烷基、卤素基、烷氧基或
氰基分别与4、5和6位键合,以使
锂化反应在2位最活跃;对
苯甲醛中的甲酰基进行
缩醛保护;顺序进行2位的
锂化、
叠氮化和胺化;然后进行
缩醛去保护。