1-chloro-5-trifluoromethoxy-isoquinoline 、
BOC-NH-(L-tert-BuGly)-[(4R)-hydroxy-S-proline]-(1R,2S-vinyl acca)-CONHSO2-cyclopropane 在
lanthanum(III) chloride 、
potassium tert-butylate 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 0.5h,
以46%的产率得到Carbamic acid, [(1S)-1-[[(2S,4R)-2-[[[(1R,2S)-1-[[(cyclopropylsulfonyl)amino]carbonyl]-2-ethenylcyclopropyl]amino]carbonyl]-4-[[5-(trifluoromethoxy)-1-isoquinolinyl]oxy]-1-pyrrolidinyl]carbonyl]-2,2-dimethylpropyl]-, 1,1-dimethylethyl ester