A process for cyanating an aldehyde is provided. The process comprises reacting the aldehyde with: i) a cyanide source which does not comprise a Si—CN bond or a C—(C═O)—CN moiety; and ii) a substrate susceptible to nucleophilic attack not comprising a halogen leaving group; in the presence of a chiral catalyst. Preferably, the chiral catalyst is a chiral vanadium or titanium catalyst. The cyanide source is preferably an alkali metal cyanide and the substrate susceptible to nucleophilic attack not comprising a halogen leaving group is a carboxylic anhydride.
提供了一种使醛
氰化的方法。该方法包括在手性
催化剂的存在下,将醛与:i) 不包含Si—CN键或C—(C═O)—CN基团的
氰化物源;以及ii) 易受亲核攻击的底物,其不包含卤素离去基团进行反应。最好的情况下,手性
催化剂是手性
钒或
钛催化剂。
氰化物源最好是碱
金属
氰化物,易受亲核攻击的底物不包含卤素离去基团是
羧酸酐。