Bis(amino acid) derivatives of 1,4-diamino-2-butyne that adopt a C2-symmetric turn conformation
作者:Timothy P. Curran、Kevin A. Marques、Mark V. Silva
DOI:10.1039/b508608f
日期:——
1,4-Diamino-2-butyne was prepared from 1,4-dichloro-2-butyne via 1,4-diazido-2-butyne. Bis(amino acid) derivatives of 1,4-diamino-2-butyne having the general structure (Boc-Xxx-NHCH2C)2
(Xxx = Ala, Phe and Met) were prepared and examined by 1H NMR spectroscopy. Using chemical shift, coupling constant and DMSO titration data it is found that these compounds adopt a C2-symmetric turn conformation featuring two intramolecular hydrogen bonds.
1,4-二氨基-2-丁炔是通过1,4-二氯-2-丁炔经由1,4-二叠氮-2-丁炔制备的。具有通用结构(Boc-Xxx-NHCH2C)2的1,4-二氨基-2-丁炔的双氨基酸衍生物(Xxx = 丙氨酸、苯丙氨酸和蛋氨酸)被制备并进行了1H NMR光谱分析。利用化学位移、耦合常数和DMSO滴定数据,发现这些化合物采用了一种C2对称性转曲构象,具有两个分子内氢键。