(3aR,4R,6aS)-5-Benzyl-2,2-dimethyl-4-((4S,5R,4'R)-2,2,2',2'-tetramethyl-[4,4']bi[[1,3]dioxolanyl]-5-yl)-tetrahydro-[1,3]dioxolo[4,5-c]pyrrole                                                                                                                                                              在
                                                                                                                                                                                 
对甲苯磺酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        以68%的产率得到(R)-1-[(4R,5R)-5-((3aR,4R,6aS)-5-Benzyl-2,2-dimethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyrrol-4-yl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-ethane-1,2-diol