J Pept Sci, 2018, 24(45):e3074

Novel side reaction accompanying cyclization of Glu(R1)-Glu(R2) dipeptides via lactamization of the Glu(R1) residue

A series of linear peptides with the general formula H-Glu(R1)-Glu(R2)-OH was subjected to cyclization under standard conditions. Formation of respective 2,5-diketopiperazines was accompanied by transformation of the N-terminal Glu(R1) to pyroglutamic acid residue. Even in the case R1 is an amino acid residue attached to the N-terminal γ-carboxyl group, lactamization leads to its elimination. The observed reaction has not been reported so far in the literature. Correspondingly, an alternative route to Glu(R1)-Glu(R2)-containing 2,5-diketopiperazines was applied to improve the overall yields.

IBCH: 3042
Ссылка на статью в журнале: http://doi.wiley.com/10.1002/psc.3074
Кол-во цитирований на 10.2018: 0
Данные статьи проверены модераторами 2018-06-01