(3R,4R)-3-(1,3-dioxolan-2-yl)-3,4-dimethyl-2-oxo-cyclohexanecarbonitrile   、                                                                                      (E)-5-(tert-Butyl-diphenyl-silanyloxy)-pent-3-en-2-one                                                                                                                                                              在
                                                                                                                                                                                 
四氢吡咯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (1S,2R,4aR,5R)-5-(tert-Butyl-diphenyl-silanyloxymethyl)-1-[1,3]dioxolan-2-yl-1,2-dimethyl-7-oxo-1,3,4,5,6,7-hexahydro-2H-naphthalene-4a-carbonitrile   、                                                                                             
(1S,2R,4aR,5S)-5-(tert-Butyl-diphenyl-silanyloxymethyl)-1-[1,3]dioxolan-2-yl-1,2-dimethyl-7-oxo-1,3,4,5,6,7-hexahydro-2H-naphthalene-4a-carbonitrile