三光气   、                                                                                      
(Z)-7-[(1S,2R,3S,5R)-2-(tert-Butyl-diphenyl-silanyloxymethyl)-3,5-dihydroxy-cyclopentyl]-hept-5-enoic acid 2-trimethylsilanyl-ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以93%的产率得到(Z)-7-[(1S,5R,6S,7R)-7-(tert-Butyl-diphenyl-silanyloxymethyl)-3-oxo-2,4-dioxa-bicyclo[3.2.1]oct-6-yl]-hept-5-enoic acid 2-trimethylsilanyl-ethyl ester