(1S,2R,3S)-3-amino-4-cyclohexyl-1-cyclopropyl-butane-1,2-diol 、
ditrityl-L-histidine 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 作用下,
以
乙酸乙酯 、
乙腈 为溶剂,
生成
(S)-N-[(1S,2R,3S)-1-(cyclohexylmethyl)-3-cyclopropyl-2,3-dihydroxypropyl]-1-trityl-α-(tritylamino)imidazole-4-propionamide