Acidic coupling and aminolytic TFA cleavage approaches in a new synthesis of an l- m-sarcolysin containing antitumor tripeptide ester
作者:Imre Weisz、John Roboz、J. George Bekesi
DOI:10.1016/0040-4039(95)02261-9
日期:1996.1
roethyl)amino]-phenylalanyl-l-norvaline ethyl ester hydrochloride, 4 (and its 3H and 14C doublylabeled version) was synthesized starting with reacting unprotected l-m-sarcolysin, 1, with TFA-Pro-Cl in an acidic system to yield TFA-Pro-l-m-sarcolysin, 2, which was transformed to the TFA-tripeptide ethyl ester, 3. Selective aminolytic cleavage of the TFA group with butylamine in abs. ethanol, followed
-L-脯氨酰基LM- [双(氯乙基)氨基] -苯丙-1-正缬氨酸乙酯盐酸盐,4(及其3 H和14 C ^ doublylabeled版本)起始,合成无保护的LM-沙可来新,反应1,用TFA- Pro-Cl在酸性系统中产生TFA-Pro-lm-sarcolysin,2,将其转化为TFA-三肽乙酯3。完全用丁胺对TFA基团进行选择性氨解裂解。乙醇,然后用HCl中和,得到4。