Addition Reactions of Aldehydes to Lithium Enolates of 1,3-Dioxolan-4-ones: A Configurational Reassessment
作者:Arturo Battaglia、Gaetano Barbaro、Patrizia Giorgianni、Andrea Guerrini、Carlo Bertucci、Silvano Geremia
DOI:10.1002/1521-3765(20001002)6:19<3551::aid-chem3551>3.0.co;2-r
日期:2000.10.2
The results for the addition reactions of chiral lithium (2S)-enolates of 1,3-dioxolan-4-ones to aldehydes and to acetophenone, yielding the corresponding dioxolanone alcohols have been revised. The results reported herein differ from those reported in the literature, both in product distribution and in the stereochemical assignment of the products. In fact, in several cases no stereocontrol was observed
修订了1,3-二氧戊环-4-酮手性锂(2S)-烯酸酯与醛和对乙酰苯的加成反应,生成相应的二氧戊环醇的结果。本文报道的结果在产物分布和产物的立体化学分配上均不同于文献报道的结果。实际上,在几种情况下,在烯醇锂的C5碳原子上未观察到立体控制。还对几种二氧戊环醇进行了(2S,5R,1'S)/(2S,5R,1'R)立体化学评估。主要构象体被认为具有分子内氢键合的五元环结构,而不是先前对于环状二氧戊环醇所建议的六元环结构。