(E)-5-(tert-Butyl-dimethyl-silanyloxy)-4-hydroxy-3-methyl-pent-2-enoic acid methyl ester   、                                                                                      
碘甲烷                                                                                                                                                              在
                                                                                                                                                                                 
silver(l) oxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 (E)-(R)-5-(tert-Butyl-dimethyl-silanyloxy)-4-methoxy-3-methyl-pent-2-enoic acid methyl ester   、                                                                                             (E)-(S)-5-(tert-Butyl-dimethyl-silanyloxy)-4-methoxy-3-methyl-pent-2-enoic acid methyl ester