Unexpected Z-stereoselectivity in the Ramberg–Bäcklund reaction of diarylsulfones leading to cis-stilbenes: the effect of aryl substituents and application in the synthesis of the integrastatin nucleus
作者:Jonathan S. Foot、Gerard M. P. Giblin、A. C. Whitwood、R. J. K. Taylor
DOI:10.1039/b418426b
日期:——
With certain substituent patterns, benzyl benzyl sulfone systems have been found to give unexpectedly high Z-stereoselectivity (up to E:Z = 1:16) in the Meyers variant of the Ramberg-Backlund reaction. A range of sulfones, bearing various aryl substituents, were explored to rationalize this unprecedented selectivity for Z-stilbene systems. This high level of double bond stereocontrol has also been
在某些取代基模式下,已发现在Ramberg-Backlund反应的Meyers变体中,苄基苄基砜系统具有出乎意料的高Z-立体选择性(最高E:Z = 1:16)。研究了一系列带有各种芳基取代基的砜,以合理化这种对Z-二苯乙烯体系的前所未有的选择性。这种高水平的双键立体控制也已用于整合素抑制素核的合成,这是两种具有高生物活性的抗HIV化合物的核心。