ethyl (E,E)-6-methoxy-4-methyl-1-(trimethylsilanylethynyl)hexa-2,4-dienyl fumarate 在
2,6-二叔丁基-4-甲基苯酚 作用下,
以
甲苯 为溶剂,
生成 (1R,3aR,4R,5S,7aS)-5-Methoxymethyl-6-methyl-3-oxo-1-trimethylsilanylethynyl-1,3,3a,4,5,7a-hexahydro-isobenzofuran-4-carboxylic acid ethyl ester 、 (1S,3aR,4R,5S,7aS)-5-Methoxymethyl-6-methyl-3-oxo-1-trimethylsilanylethynyl-1,3,3a,4,5,7a-hexahydro-isobenzofuran-4-carboxylic acid ethyl ester