Spectroscopic, crystallographic and computational studies of the formation and isomerization of cyclic acetals and ketals of pentonolactones
作者:So-Yeop Han、Madeleine M. Joullié、Valery V. Fokin、Nicos A. Petasis
DOI:10.1016/s0957-4166(00)80400-0
日期:1994.12
D-xylonolactone, D-lyxonolactone 2-deoxy-D-ribonolactone toward benzaldehyde and acetone in acidic media, were examined. The reactions involved complex equilibria and were investigated with extensive 13C NMR studies as well as X-ray crystallographic analysis of selected products. Molecular mechanics (MM2) and semiempirical (PM3 and AM1) calculations of some derivatives were carried out in order to facilitate structural
检查了D-核糖内酯,L-阿拉伯糖内酯,D-木糖内酯,D-苯二酸内酯2-脱氧-D-核糖内酯在酸性介质中对苯甲醛和丙酮的不同反应性。反应涉及复杂的平衡,并通过广泛的13 C NMR研究以及所选产品的X射线晶体学分析进行了研究。为了方便结构和构象的分配,对某些衍生物进行了分子力学(MM2)和半经验(PM3和AM1)计算。D-戊烯-1,4-内酯与苯甲醛和丙酮反应的反应活性差异在结构和构象方面均得到合理化。