3-benzyloxy-2-methyl-1-propylmagnesium bromide   、                                                                                      2-[(1R,5R,6S)-6-(1,3-dioxolan-2-yl)-5,6-dimethylcyclohex-2-en-1-yl]-N-methoxy-N-methylacetamide                                                                                                                                                                                              以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        以90%的产率得到1-[(1R,5R,6S)-6-(1,3-dioxolan-2-yl)-5,6-dimethylcyclohex-2-en-1-yl]-4-methyl-5-phenylmethoxypentan-2-one