Regioselective Synthesis of Natural and Unnatural (Z)-3-(1-Alkylidene)phthalides and 3-Substituted Isocoumarins Starting from Methyl 2-Hydroxybenzoates
benzene ring, have been selectively and efficiently synthesized by a new protocol which involves: (i) the conversion of methyl 2-hydroxybenzoates into the corresponding nonaflates; (ii) Pd-catalyzed alkynylation reactions of these derivatives; (iii) the conversion of the so obtained methyl 2-(1-alkynyl)benzoates into the corresponding carboxylic acids followed by a transition metal-catalyzed heteroannulation
Abstract The first synthesis of (Z)-3-(2-hydroxybutylidene)phthalide (1) is described, starting from phthalic anhydride (2). The key step in the synthesis is the condensation of the kinetic lithium enolate of butanone with 2.
Wang Zhiwei, Li Shaobai, Yan Fulin, Li Yulin, Synth. Commun, 24 (1994) N 21, S 3135-3139
作者:Wang Zhiwei, Li Shaobai, Yan Fulin, Li Yulin
DOI:——
日期:——
USE OF PHTHALIDE DERIVATIVES FOR THE TREATMENT AND PREVENTION OF DIABETES MELLITUS
申请人:DSM IP Assets B.V.
公开号:EP1622605B1
公开(公告)日:2009-07-15
Use of phthalide derivatives for the treatment and prevention of diabetes mellitus
申请人:D'Orazio Daniel
公开号:US20070082947A1
公开(公告)日:2007-04-12
The present invention relates to the use of a compound as effective agent for the prevention or treatment of diabetes mellitus in a mammal. Said compounds being selected from the group of phthalide derivatives and exhibit excellent blood glucose lowering effects and thus are effective agents in the prevention or treatment of diabetes mellitus in mammals.