Quaternary Carbon Synthesis by Titanocene Catalyzed Radical Allyl Transfer on Epoxides
作者:Michael Schrempp、Raphael Wagner、Hermann Gleich、Andreas Gansäuer、Dirk Menche
DOI:10.1021/acs.orglett.3c03181
日期:2023.11.17
A versatile titanocene-catalyzed radical allyl transfer reaction on epoxides is reported. Epoxide opening occurs regioselectively at the more hindered side, and variously substituted allyl sulfone may be coupled to this position in an efficient manner, enabling a rapid access to quaternary carbon centers with useful functionalities for further elaboration. Furthermore, the procedure can be expanded
报道了一种多功能的二茂钛催化的环氧化物自由基烯丙基转移反应。环氧化物打开在受阻较多的一侧区域选择性地发生,并且各种取代的烯丙基砜可以以有效的方式偶联到该位置,从而能够快速接近具有有用官能团的季碳中心以供进一步阐述。此外,该过程可以扩展到立体选择性变体。这种新的自由基烯丙基转移扩大了有机合成中烯丙基化的范围。