Phosphonocarboxylate compounds pharmaceutical compositions, and methods
申请人:The Procter & Gamble Company
公开号:US05760021A1
公开(公告)日:1998-06-02
The present invention relates to compositions comprising pharnaceutically-acceptable carriers and a phosphonocarboxylate, or a pharmaceutically-acceptable salt thereof, having a structure according to formula (I): ##STR1##
A novel carbon electrophile induced intermolecular oxa-Diels–Alder/semipinacolrearrangement/aldol cascade reaction of allylic silyl ether with β,γ-unsaturated α-ketoester has been developed under the promotion of SnCl4. This highly efficient transformation enables the quick construction of polycyclic architectures with up to five contiguous stereogenic centers in a single operation with moderate to