Sequential Reduction of Nitroalkanes Mediated by CS<sub>2</sub> and Amidine/Guanidine Bases: A Controllable Nef Reaction
作者:Minsoo Ju、Weiyang Guan、Jennifer M. Schomaker、Kaid C. Harper
DOI:10.1021/acs.orglett.9b02987
日期:2019.11.15
In this letter, we describe a mild, functional group-tolerant reductive Nef reaction that utilizes CS2 and an amidine or guanidine base to sequentially cleave N–O bonds. These conditions transform secondary nitroalkanes to ketones via an isolable oxime with minimal erosion at labile stereogenic carbons, show excellent compatibility with groups sensitive to oxidizing or reducing conditions, display
在这封信中,我们描述了一种温和的、官能团耐受的还原性 Nef 反应,该反应利用 CS 2和脒或胍碱依次裂解 N-O 键。这些条件通过可分离的肟将仲硝基烷烃转化为酮,对不稳定的立体碳具有最小的侵蚀,与对氧化或还原条件敏感的基团表现出优异的相容性,表现出良好的可扩展性,并且非常适合从容易获得的3-吡咯烷酮基序生成有用的3-吡咯烷酮基序1,3-偶极环加成产物。