作者:Sathish Boini、Radhe Vaid、Kenneth Moder、David Mitchell
DOI:10.1055/s-0029-1216813
日期:2009.6
Synthesis of the title compound was accomplished via coupling of (S)-alaninyl-(S)-1-amino-3-methyl-4,5,6,7-tetrahydro-2H-3-benzazepin-2-one with the activated trimethylsilyl ester of (S)-2-trimethylsilyloxy-3-methylbutyric acid, followed by deprotection and crystallization in situ. The starting material was prepared by the condensation of (S)-1-amino-3-methyl-4,5,6,7-tetrahydro-2H-3-benzazepin-2-one with activated N-(2-methoxycarbonyl-1-methylvinyl)-(S)-alanine sodium salt in the form of the mixed carboxylic carbonic anhydride, followed by enamine hydrolysis using methanesulfonic acid.
目标化合物的合成是通过(S)-丙氨酸基(S)-1-氨基-3-甲基-4,5,6,7-四氢-2H-3-苯并氮杂环-2-酮与(S)-2-三甲基硅氧基-3-甲基丁酸的活化三甲基硅醇酯进行偶联,然后进行去保护和原位结晶。起始材料是通过(S)-1-氨基-3-甲基-4,5,6,7-四氢-2H-3-苯并氮杂环-2-酮与活化的N-(2-甲氧基羧基-1-甲基乙烯)(S)-丙氨酸钠盐以混合羧酸碳酸酐的形式缩合制备,再通过使用甲磺酸进行烯胺水解。