7-ethyl-N-[(1S,2R)-2-hydroxy-1-(phenylmethyl)-3-(tetrahydro-2H-pyran-4-ylamino)propyl]-1-methyl-3,4-dihydro-1H-[1,2,5]thiadiazepino[3,4,5-hi]indole-9-carboxamide 2,2-dioxide 、
二碳酸二叔丁酯 以
二氯甲烷 为溶剂,
以85%的产率得到1,1-dimethylethyl ((2R,3S)-3-{[(7-ethyl-1-methyl-2,2-dioxido-3,4-dihydro-1H-[1,2,5]thiadiazepino[3,4,5-hi]indol-9-yl)carbonyl]amino}-2-hydroxy-4-phenylbutyl)tetrahydro-2H-pyran-4-ylcarbamate