Vereinfachte Peptidsynthese mit schutzgruppenfreien Aminosäure-Hydrochloriden nach dem Prinzip der Vierkomponenten-Kondensation
作者:Jürgen Kintscher、Jürgen Martens
DOI:10.1055/s-1992-26240
日期:——
Simplified Synthesis of Peptides with Non-protected Amino acid hydrochlorides via Four-Component Condensation Synthesis of sulfur containing peptide analogues, 3-(Ï-aminoalkanoyl)-2, 2-dimethyl-1,3-thiazolidine-4-carboxamides 2, via Ugi four-component condensation (4CC) starting from 2,5-dihydro-1,3-thiazoles 1, isocyanides and non-protected amino acid hydrochlorides is described. Involvement of N-phthaloyl amino acids in a typical 4CC and following dephthaloylation of the resulting compounds 2,2-dimethyl-3-(Ï-phthalimidoalkanoyl)-1, 3-thiazolidine-4-carboxamides 3, affords peptides 2 in lower overall yields than by the one-step way.
以 2,5-二氢-1,3-噻唑 1、异氰酸酯和非保护性氨基酸盐酸盐为起点,通过 Ugi 四组份缩合(4CC)合成含硫肽类似物 3-(Ï-氨基烷酰基)-2,2-二甲基-1,3-噻唑烷-4-甲酰胺 2。在典型的 4CC 中加入 N-邻苯二甲酰基氨基酸,然后将所得化合物 2,2-二甲基-3-(邻苯二甲酰亚胺基烷酰基)-1,3-噻唑烷-4-甲酰胺 3 去邻苯二甲酰基化,可得到肽 2,总产率低于一步法。