(S)-α-amino-N-[(1S,2S,4S)-1-(cyclohexylmethyl)-2-hydroxy-4-isopropyl-5-hexenyl]imidazole-4-propionamide 、
N-[[2-(4-biphenyloxy)ethyl ]carbamoyl]-3-phenyl-L-alanine 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 作用下,
以
甲醇 、
二氯甲烷 、
乙腈 为溶剂,
以90 mg (45%)的产率得到1-[2-(4-biphenyloxy)ethyl]-3-[(S)-α-[[(S)-1-[[(1S,2S,4S)-1-(cyclohexylmethyl)-2-hydroxy-4-isopropyl-5-hexenyl]carbamoyl]-2-imidazol-4-ylethyl]-carbamoyl]phenethyl]urea