5-Methyl-6-(2-tetrahydropyranyloxy)-8-<3-oxo-7-(2-tetrahydropyranyloxy)-2-oxa-6-bicyclo<3.3.0>octyl>-7-octensaeure-tert-butylester                                                                                                                                                              在
                                                                                                                                                                                 
红铝                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 6.0h,
                                                                                                                以100%的产率得到(E)-8-[(3aS,5S,6aR)-2-Hydroxy-5-(tetrahydro-pyran-2-yloxy)-hexahydro-cyclopenta[b]furan-4-yl]-5-methyl-6-(tetrahydro-pyran-2-yloxy)-oct-7-enoic acid tert-butyl ester