2-((3S,6S)-6-Acetoxymethyl-3,6-dihydro-2H-pyran-3-yl)-2-prop-2-ynyl-malonic acid diethyl ester 在
tris(dibenzylideneacetone)dipalladium(0) chloroform complex 、
三苯基膦 作用下,
以
溶剂黄146 为溶剂,
以78%的产率得到(4aS,7aS)-3-Acetoxymethyl-5-methylene-4a,5,6,7a-tetrahydro-1H-cyclopenta[c]pyran-7,7-dicarboxylic acid diethyl ester