(R)-2-[(R)-1-((2S,3R)-2-Allyl-tetrahydro-pyran-3-yloxy)-allyl]-1,4-dioxa-spiro[4.5]decane 在
Grubbs catalyst first generation 作用下,
以
二氯甲烷 为溶剂,
以100%的产率得到(4aR,6R,9aS)-(R)-6-(1,4-Dioxa-spiro[4.5]dec-2-yl)-3,4,4a,6,9,9a-hexahydro-2H-1,5-dioxa-benzocycloheptene