Synthesis of Tripeptides Containing Heterocyclic α-Amino Acids by Using Heterospirocyclic 3-Amino-2H-azirines
作者:Heinz Heimgartner、Christoph Strässler、Anthony Linden
DOI:10.3987/com-18-s(t)22
日期:——
By using the 'azirine/oxazolone method', di- and tripeptides containing six-membered heterocyclic 4-amino-4-carboxylic acids with a piperidine, tetrahydropyran or tetrahydrothiopyran ring have been synthesized. It has been shown that the corresponding heterospirocyclic 3-(N-methyl-N-phenylamino)-2H-azirines are suitable synthons for these heterocyclic alpha-amino acids. As expected, the presence of these alpha,alpha-disubstituted alpha-amino acids stabilizes beta-turn conformations in the prepared tripeptides of type Z-Phe-Xaa-Val-OR.