Transition-metal-free synthesis of (Z)-3-ylidenephthalides from 2-acyl-benzoic acids
摘要:
We report a highly efficient method for the synthesis of (Z)-3-ylidenephthalides via intramolecular cyclization of readily available 2-acyl-benzoic acids mediated by TSTU at room temperature. Using this method, diversely substituted (Z)-3-ylidenephthalides have been generated in good to excellent yields. The application of the method is highlighted by gram-scale preparation of the antiplatelet drug n-butylphthalide. (C) 2014 Elsevier Ltd. All rights reserved.
Verwendung von 3-Benzalphthaliden als UV -Stabilisatoren für thermoplastische, aromatische Polyester, Polycarbonate und Polyestercarbonate
申请人:BAYER AG
公开号:EP0232734A1
公开(公告)日:1987-08-19
Gegebenenfalls substituierte 3-Benzalphthalide sind wirksame UV-Stabilisatoren für thermoplastische aromatische Polyester, Polycarbonate und Polyestercarbonate.