Stereoselective Synthesis of (<i>E</i>)-5-Hydroxy-4-methyl-2-alkenoates by Palladium-Catalyzed Stereospecific Hydrogenolysis of (<i>E</i>)-4,5-Epoxy-4-methyl-2-alkenoates with Ammonium Formate
Palladium-catalyzedhydrogenolysis of (E)-4,5-epoxy-4-methyl-2-alkenoates with HCO2H-Et3N gave (E)-5-hydroxy-4-methyl-2-alkenoates in good yields with inversion of stereochemistry.
PROCESS FOR PRODUCING OPTICALLY ACTIVE 3-SUBSTITUTED-3-FORMYL-2-HYDROXYPROPANOIC ACID COMPOUND
申请人:Hayashi Yujiro
公开号:US20130137880A1
公开(公告)日:2013-05-30
The present invention provides a production method of optically active 3-substituted-3-formyl-2-hydroxypropanoic acid compound (4), which includes a step of reacting glyoxylic acid compound (1-1) or (1-2) with aldehyde (2) in the presence of optically active pyrrolidine compound (3);
wherein each symbol is as defined in the specification.