(1S,2R,3S,4R)-2-(2-Hydroxy-ethyl)-4-(tetrahydro-pyran-2-yloxy)-3-(tetrahydro-pyran-2-yloxymethyl)-cyclopentanol                                                                                                                                                              在
                                                                                                                                                                                 
三苯基膦   、                                                                                                  
偶氮二甲酸二乙酯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以85%的产率得到(3aR,4S,5R,6aS)-5-(Tetrahydro-pyran-2-yloxy)-4-(tetrahydro-pyran-2-yloxymethyl)-hexahydro-cyclopenta[b]furan