2-Benzoyl-2-ethoxycarbonylvinyl-1 and 2-benzoylamino-2-methoxy-carbonylvinyl-1 as<i>N</i>-protecting groups in peptide synthesis. Their application in the synthesis of dehydropeptide derivatives containing<i>N</i>-terminal 3-heteroarylamino-2,3-dehydroalanine
作者:Jurij Svete、Mateja Aljaž-Rožič、Branko Stanovnik
DOI:10.1002/jhet.5570340128
日期:1997.1
and 2-benzoylamino-2-methoxycarbonylvinyl groups in the peptide synthesis. Reactions of ethyl 2-benzoyl-3-dimethylaminopropenoate (6) with α-amino acids gave N-(2-benzoyl-2-ethoxycarbonylvinyl-1)-α-amino acids 13–19. These were coupled with various amino acid esters to form N-(2-benzoyl-2-ethoxycar-bonylvinyl-1)-protected dipeptide esters 20–31. The removal of 2-benzoyl-2-ethoxycarbonylvinyl-1 group
2-苯甲酰基-3-二甲基氨基丙酸乙酯(6)和2-苯甲酰基氨基-3-二甲基氨基丙酸甲酯(46)被用作保护2-苯甲酰基-2-乙氧基羰基乙烯基-1和2-苯甲酰基氨基-2的氨基的试剂。肽合成中的-甲氧基羰基乙烯基。2-苯甲酰基-3-二甲基氨基丙酸乙酯(6)与α-氨基酸的反应得到N-(2-苯甲酰基-2-乙氧基羰基乙烯基-1)-α-氨基酸13-19。将它们与各种氨基酸酯偶联,形成N-(2-苯甲酰基-2-乙氧基羰基-乙烯基-1)保护的二肽酯20-31。通过肼一盐酸盐或羟胺盐酸盐去除2-苯甲酰基-2-乙氧基羰基乙烯基-1基团,可以高收率得到二肽酯32-41的氢氯化物。类似地,用甘氨酸取代2-苯甲酰基氨基-3-二甲基氨基丙酸甲酯(46)中的二甲基氨基得到N-(2-苯甲酰基氨基-2-甲氧基碳原子-乙烯基-1)甘氨酸(47),其与甘氨酸乙酯偶联得到N- [ N-(2-苯甲酰基氨基-2-甲氧基羰基乙烯基-1)甘氨酰]甘氨酸乙酯(48)。用2-氨基-4