PROCESS FOR PRODUCING OPTICALLY ACTIVE BETA-AMINO ALDEHYDE COMPOUND
申请人:Hayashi Yujiro
公开号:US20130211139A1
公开(公告)日:2013-08-15
The invention relates to a method of producing optically active β-aminoaldehyde compound (3) by reacting imine compound (1-1) or sulfone compound (1-2) with aldehyde compound (2) in the presence of an optically active pyrrolidine compound.
wherein each symbol is as defined in the specification.
anti‐selective Mannichreaction of aldehydes with N‐sulfonyl imines has been developed by using a 4‐hydroxypyrrolidine in combination with an external Brønstedacid. The catalyst design is based on three elements: the α‐substituent of the pyrrolidine, the 4‐hydroxy group, and the Brønstedacid, the combination of which is essential for high chemical and stereochemical efficiency. The reaction works with