Conformational switching between diastereoisomeric atropisomers of arenedicarboxamides induced by complexation with Lewis acids
作者:Jonathan Clayden、Lluís Vallverdú、James Clayton、Madeleine Helliwell
DOI:10.1039/b716105k
日期:——
Tertiary diamides of xanthene-1,8-dicarboxylic acid and biphenyl-2,2′-dicarboxylic acid exhibit a thermodynamic preference for anti stereochemistry which is inverted in the presence of Ti- or Sn-based Lewis acids, allowing interconversion between kinetically stable syn and anti diastereoisomeric atropisomers.
呫吨-1,8-二羧酸和联苯-2,2′-二羧酸的叔二酰胺表现出反立体化学的热力学偏好,这种偏好在以钛或锡为基础的路易斯酸存在时会发生逆转,从而使动力学上稳定的同分异构体和反非对映异构体之间发生相互转化。