A Stereoconvergent Tsuji–Trost Reaction in the Synthesis of Cyclohexenyl Nucleosides
作者:Anna Esposito、Concetta Giovanni、Maria De Fenza、Giovanni Talarico、Marco Chino、Giovanni Palumbo、Annalisa Guaragna、Daniele D'Alonzo
DOI:10.1002/chem.201905367
日期:2020.2.26
A highly regio- and stereoselective route to d- and l-cyclohexenyl nucleosides has been devised, using the Tsuji-Trost reaction as the key step. Contrarily to the widely accepted mechanism (involving a net retention of configuration), the reaction proceeded in a highly stereoconvergent manner, providing cis nucleosides regardless of the relative configuration of the starting materials. DFT calculations
使用Tsuji-Trost反应作为关键步骤,设计了对d-和l-环己烯基核苷的高度区域选择性和立体选择性的途径。与被广泛接受的机理相反(涉及构型的净保留),反应以高度立体收敛的方式进行,无论起始材料的相对构型如何,均提供顺式核苷。DFT计算证实了实验数据,同时提示了立体化学反应结果的起源。