(S)-2-[(S)-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30%的产率得到(4aR,6S,9aS)-(S)-6-(1,4-Dioxa-spiro[4.5]dec-2-yl)-3,4,4a,6,9,9a-hexahydro-2H-1,5-dioxa-benzocycloheptene