5-methoxycarbonyl-5-(tetrahydro-furan-3-yl)-hex-2-ynedioic acid 1-ethyl ester 6-methyl ester 在
Ph
3PAuNTf
2 作用下,
以
硝基甲烷 为溶剂,
反应 20.0h,
生成 (3aR,7aR)-3,3a,5,7a-tetrahydro-2H-benzofuran-4,4,7-tricarboxylic acid 7-ethyl ester 4,4-dimethyl ester 、 (3aR,6aR)-6-[1-ethoxycarbonyl-meth-(Z)-ylidene]-hexahydro-cyclopenta[b]furan-4,4-dicarboxylic acid dimethyl ester