Reactivity of 1-aminoazetidine-2-carboxylic acid during peptide forming procedures: observation of an unusual variant of the hydrazino turn
作者:Amandine Altmayer-Henzien、Valérie Declerck、Régis Guillot、David J. Aitken
DOI:10.1016/j.tetlet.2012.11.112
日期:2013.2
Peptide formation on the N-terminal of 1-aminoazetidine-2-carboxylic acid is rendered problematic due to a ring opening reaction. However C-terminal development is possible and two diastereomeric mixed hydrazino dipeptides were prepared. Solution-state studies of these compounds suggest the presence of intramolecular hydrogen bonding, consistent with a hydrazino turn, and the crystal structure of one
由于开环反应,在1-氨基氮杂环丁烷-2-羧酸的N-末端上的肽形成成为问题。然而,C-末端的发展是可能的,并且制备了两种非对映异构的混合肼基二肽。这些化合物的固溶态研究表明,存在分子内氢键,与肼基肼转向一致,并且其中一种化合物的晶体结构显示出马蹄形构象,其中心点似乎是涉及三个氢键的肼基肼转向。接受者。