diethyl 2-[(2R,3S,6S)-3-acetyloxy-2-(acetyloxymethyl)-3,6-dihydro-2H-pyran-6-yl]-2-prop-2-enylpropanedioate 在
四(三苯基膦)钯 作用下,
以
溶剂黄146 为溶剂,
以72%的产率得到diethyl (2S,4aS,7aS)-2-(acetyloxymethyl)-5-methylidene-2,4a,6,7a-tetrahydrocyclopenta[b]pyran-7,7-dicarboxylate