2(R)- and 2(S)-amino-1-(4-methanesulphonyl-phenyl)-3,3-dimethyl-butan-1-one hydrochloride 、
(2R)-2-({formyl[(phenylmethyl)oxy]amino}methyl)hexanoic acid 在
N-甲基吗啉 、
1-羟基苯并三唑 盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
以67%的产率得到(2R, 1R)- and (2R, 1S)-2-[(N-benzyloxy-N-formylamino)-methyl]-hexanoic acid [1'-(4-methanesulfonyl-benzoyl)-2',2'-dimethyl-propyl]amide