Phase behavior and crystal structure of 3-(1-naphthyloxy)- and 3-(4-indolyloxy)-propane-1,2-diol, synthetic precursors of chiral drugs propranolol and pindolol
作者:Alexander A. Bredikhin、Aidar T. Gubaidullin、Zemfira A. Bredikhina、Robert R. Fayzullin、Aida I. Samigullina、Dmitry V. Zakharychev
DOI:10.1016/j.molstruc.2013.04.018
日期:2013.8
Abstract Valuable precursors of popular chiral drugs propranolol and pindolol, 3-(1-naphthyloxy)-propane-1,2-diol 3 and 3-(4-indolyloxy)-propane-1,2-diol 4 were investigated by IR spectroscopy, DSC, and X-ray diffraction methods. Both compounds, crystallizing from enantiopure feed material, form “guaifenesin-like” crystal packing in which the classic H-bonded bilayers, framed in both sides by hydrophobic
摘要 通过红外光谱研究了流行的手性药物普萘洛尔和吲哚洛尔、3-(1-萘氧基)-丙烷-1,2-二醇 3 和 3-(4-吲哚氧基)-丙烷-1,2-二醇 4 的重要前体, DSC 和 X 射线衍射方法。这两种化合物,从对映纯原料中结晶,形成“愈创甘油醚样”晶体堆积,其中经典的 H 键双层,由分子的疏水片段构成,作为基本的晶体形成基序。Diol 4 易于自发分解并保留其从外消旋体结晶的堆积模式。在相同条件下,二醇3形成弱稳定的固体外消旋化合物。确定并讨论了这种行为的一些原因。