(E)-10-(2-Bromo-allyl)-10-ethoxycarbonyl-6-methoxy-undec-2-en-7-ynedioic acid 11-ethyl ester 1-methyl ester 在
palladium diacetate
potassium carbonate 、
三苯基膦 作用下,
以24%的产率得到8-Methoxy-3,4,5,6,7,8-hexahydro-1H-as-indacene-2,2,5-tricarboxylic acid diethyl ester methyl ester