Conformational properties and chiral separation of dibenzo[b,f]thieno[3,4-d]-fused oxepines and thiepines
作者:Goran Landek、Ivana Ozimec Landek、Dijana Pešić、Milan Mesić、Vitomir Šunjić
DOI:10.1007/s00706-013-1072-x
日期:2013.12
dynamic properties of planar chiral 1-hydroxymethyl-substituted dibenzo[b,f]thieno[3,4-d]-fused oxepine and thiepine derivatives have been investigated by use of variable-temperature nuclear magnetic resonance spectroscopy combined with line-shape analysis, chiral column chromatography, and molecular modelling. NMR data and computational studies revealed the height of the energy barrier for ring inversion
摘要平面手性1-羟甲基取代的二苯并[ b,f ]噻吩并[3,4- d ]的动力学性质通过使用变温核磁共振波谱结合线形分析,手性柱色谱和分子建模,研究了[]稠合的奥西平和硫平衍生物。NMR数据和计算研究表明,噻吩衍生物中环转化的能垒高度足以在环境温度下使一对构象对映异构体存在。通过手性柱高效液相色谱法(HPLC)实现了它们的拆分。提出了对映体的绝对构象。这是[ b,d,f ]稠合的噻吩衍生物的平面手性对映异构体的首次色谱分离。 图形概要