(2S,3R,4aS,8aR)-2-Methyl-2-vinyl-3-((2R,3S)-2-vinyl-tetrahydro-pyran-3-yloxy)-octahydro-pyrano[3,2-b]pyran 在
Grubbs catalyst first generation 作用下,
以
苯 为溶剂,
以94%的产率得到(4aS,5aR,6aS,10aR,11aS,13aR)-11a-Methyl-3,4,4a,5a,6,6a,8,9,10,10a,11a,13a-dodecahydro-2H-1,5,7,11-tetraoxa-benzo[4,5]cyclohepta[1,2-b]naphthalene