developed for enantioselective synthesis ot chiral α-aminoxy acids trom aldehydes. In this method, chiral propargylic alcohols are obtained by asymmetric addition of terminal alkynes to aldehydes. The hydroxyl group then converted to aminoxy group via Mitsunobu reaction and oxidative cleavage of the internal carbon-carbon triple bond produce the carboxylic acid group. This represents a convenient approach
A New Strategy to Induce γ-Turns: Peptides Composed of Alternating α-Aminoxy Acids and α-Amino Acids
作者:Dan Yang、Wei Li、Jin Qu、Shi-Wei Luo、Yun-Dong Wu
DOI:10.1021/ja036136p
日期:2003.10.1
occurring peptides composed of α-amino acids. Here we report a new strategy to induce γ-turns in short linear peptides. We designed and synthesized several peptides (1−5) containing alternating α-l-aminoxy acids and α-d-amino acids. 1H NMR studies revealed that the γ-turn could be initiated by the following N−O turn, an eight-membered-ring intramolecular hydrogen bond induced by an α-aminoxyacid. Moreover