作者:Shlomy Arava、Jayprakash N. Kumar、Shimon Maksymenko、Mark A. Iron、Keshaba N. Parida、Peter Fristrup、Alex M. Szpilman
DOI:10.1002/anie.201610274
日期:2017.3.1
Enolonium species/iodo(III)enolates of carbonyl compounds have been suggested to be intermediates in a wide variety of hypervalent iodine induced chemical transformations of ketones, including α‐C−O, α‐C−N, α‐C−C, and α‐carbon–halide bond formation, but they have never been characterized. We report that these elusive umpoled enolates may be made as discrete species that are stable for several minutes
羰基化合物的olo烯物种/碘(III)烯醇盐被认为是多种高碘碘诱导的酮化学转化的中间体,包括α-C-O,α-C-N,α-C-C和α-碳-卤化物键的形成,但从未被表征过。我们报告说,这些难以捉摸的块状烯醇化物可能被制成离散的种类,在-78°C下可稳定几分钟,并报告了此类物质的首次光谱鉴定。结果表明,en烯类是C-O,C-N,C-Cl和C-C键形成反应中的直接中间体。我们的结果为设计各种新的转化开辟了化学空间。我们展示了olo烯物种与异戊二烯基,巴豆基,肉桂基和烯丙基硅烷反应的能力,具有绝对的区域选择性,产率高达92%。