Synthesis of 2-Acyl substituted chromanes and intermediates thereof
申请人:——
公开号:US20030233002A1
公开(公告)日:2003-12-18
Novel processes for producing enantiomerically enriched and enantiomerically pure compositions of 2-acyl substituted chromane compounds, and 2-acylchromane compounds that are intermediates for producing platelet aggregation inhibitors and/or are themselves potent platelet aggregation inhibitors are disclosed. Further disclosed are processes for producing salts such as acid addition salts for such enantiomerically enriched compositions.
Method for resolving chiral (2s) and (2r) chromanes
申请人:——
公开号:US20040014994A1
公开(公告)日:2004-01-22
Disclosed are processes for resolving chiral (2S) and (2R) benzopyrans, racemizing benzopyrans, and recycling racemized benzopyrans to increase yield of a desired enantiomer to provide purified or substantially purified bicyclic amino substituted benzopyran derivatives. Such benzopyran derivatives are preferably chromans which can be coupled with benzoyl derivatives via an amide bond to produce potent platelet aggregation inhibitors.