Benzotriazole-Mediated Synthesis of Aza-peptides: En Route to an Aza-Leuenkephalin Analogue
作者:Nader E. Abo-Dya、Suvendu Biswas、Akash Basak、Ilker Avan、Khalid A. Alamry、Alan R. Katritzky
DOI:10.1021/jo302251e
日期:2013.4.19
with an ester bond 26b, and a hybrid azatripeptide with an ester bond 28. A new protocol for the synthesis of N-Pg-azatripeptides 33a,b and 35a,b, each containing a natural amino acid at the N-terminus, avoids the low coupling rates of the aza-amino acid residue and enables the solution-phase synthesis of an azaphenylalanine analogue of Leu-enkephalin 40.