[3-Allyl-4-(2-methyl-but-3-enyloxy)-5-oxo-5H-furan-(2Z)-ylidene]-acetic acid ethyl ester 在
Grubbs catalyst first generation 作用下,
以
苯 为溶剂,
反应 16.0h,
以61%的产率得到[(Z)-6-Methyl-3-oxo-3,5,6,9-tetrahydro-2,4-dioxa-cyclopentacycloocten-(1Z)-ylidene]-acetic acid ethyl ester