Application of carbodiimide mediated Lossen rearrangement for the synthesis of α-ureidopeptides and peptidyl ureas employing N-urethane α-amino/peptidyl hydroxamic acids
作者:N. Narendra、Gundala Chennakrishnareddy、Vommina V. Sureshbabu
DOI:10.1039/b905790k
日期:——
Application of the Lossen rearrangement to the synthesis of N-urethane protected α-peptidyl ureas and ureidopeptides is reported. The carbodiimide mediated rearrangement of N-Boc/Z/Fmoc protected α-amino/peptide hydroxamic acids into isocyanates and coupling of the latter with the amino acid esters/peptide esters have been accomplished in a single-pot to obtain good yields of urea products. Synthesis
报道了Lossen重排在N-氨基甲酸酯保护的α-肽基脲和脲肽的合成中的应用。这碳二亚胺N- Boc / Z / Fmoc保护的α-氨基/肽异羟肟酸介导的重排成异氰酸酯,后者与氨基酸酯/肽酯的偶联已在单罐中完成,从而获得了较高的收率。尿素产品。还已经使用相同的方法经由N-保护的天冬氨酸的异羟肟酸酯衍生物合成脲基丙氨酸衍生物。