Stereo-selective synthesis of 2-aryl-propionic acids of high optical
申请人:——
公开号:US05248815A1
公开(公告)日:1993-09-28
The present invention relates to a stereospecific chemical synthesis of optically pure enantiomers of 2-aryl-alkanoic acids, especially those of the biologically active (S)-aryl-propionic acids, in good chemical yields, useful for preparing large quantities thereof, and having a high optical purity.
A stereospecific synthesis of 4S,5S-(–)-2-[(2R)-2,3-epoxy-2,3-dimethylbutyl]-4-methoxymethyl-5-phenyl-2-oxazoline via a Darzens condensation of 4S, 5S-(–)-2-(1-bromoethyl)-4-methoxymethyl-5-phenyl-2-oxazoline with propan-2-one is reported.
立体定向合成4 S,5 S -(-)-2-[(2R)-2,3-环氧-2,3-二甲基丁基] -4-甲氧基甲基-5-苯基-2-恶唑啉,通过Darzens缩合反应据报道,具有丙-2-酮的4 S,5 S -(-)-2-(1-溴乙基)-4-甲氧基甲基-5-苯基-2-恶唑啉。