Amino Acids and Peptides. XI. Phosphorus in Organic Synthesis. VI. Application of Diphenyl Phosphorazidate to the Synthesis of Peptides containing Various Functions
作者:TAKAYUKI SHIOIRI、SHUNICHI YAMADA
DOI:10.1248/cpb.22.859
日期:——
Application of diphenyl phosphorazidate (DPPA) to the synthesis of peptides revealed that the DPPA method is quite general because it can be applied to the formation of peptides containing various functional groups. No difficulties were encountered when the side chains of serine, threonine, valine, glutamine, asparagine, methionine, histidine, tryptophan, and pyroglutamic acid were present in the carboxyl component. Arginine and cysteine showed no trouble when their side chain functions were protected with the nitro and benzyl groups, respectively. Serine, tyrosine, and histidine could be used as the amino component without any protection of the side chains. Fragment coupling of N-benzyloxycarbonylleucylleucine with valylphenylalanine methyl ester hydrochloride by DPPA showed that no racemization occurred.
将磷酸二苯酯(DPPA)应用于多肽合成的结果表明,DPPA 方法具有很强的通用性,因为它可以用于合成含有各种官能团的多肽。当羧基成分中含有丝氨酸、苏氨酸、缬氨酸、谷氨酰胺、天冬酰胺、蛋氨酸、组氨酸、色氨酸和焦谷氨酸的侧链时,没有遇到任何困难。当精氨酸和半胱氨酸的侧链功能分别受到硝基和苄基的保护时,不会出现问题。丝氨酸、酪氨酸和组氨酸可用作氨基成分,无需对侧链进行任何保护。用 DPPA 将 N-苄氧羰基亮氨酸与戊基苯丙氨酸甲酯盐酸盐进行片段偶联,结果表明没有发生外消旋现象。