(S)-3-(Toluene-4-sulfonylamino)-2-(3-trifluoromethyl-benzoylamino)-propionic acid methyl ester                                                                                                                                                              在
                                                                                                                                                                                 bis(triphenyl) oxodiphosphonium trifluoromethanesulfonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 0.5h,
                                                                                                                生成                                                 (R)-1-(Toluene-4-sulfonyl)-2-(3-trifluoromethyl-phenyl)-4,5-dihydro-1H-imidazole-4-carboxylic acid methyl ester   、                                                                                             (S)-1-(Toluene-4-sulfonyl)-2-(3-trifluoromethyl-phenyl)-4,5-dihydro-1H-imidazole-4-carboxylic acid methyl ester