Iminonitroso ene reactions: experimental studies on reactivity, regioselectivity, and enantioselectivity
作者:Baiyuan Yang、Marvin J. Miller
DOI:10.1016/j.tetlet.2009.11.015
日期:2010.1
Enereactions of iminonitroso agents with olefins were investigated in both solution and solid phase. Reactions afforded allyl hydroxylamine products in up to 99% yield and with high regioselectivity. A Cu(I)-mediated enantioselective nitroso enereaction gave an ene product with up to 40% ee.
在溶液和固相中研究了亚氨基亚硝基试剂与烯烃的烯反应。反应以高达 99% 的产率和高区域选择性提供了烯丙基羟胺产物。Cu(I) 介导的对映选择性亚硝基烯反应产生具有高达 40% ee 的烯产物。
N-Alkylation of poor nucleophilic amine and sulfonamide derivatives with alcohols by a hydrogen autotransfer process catalyzed by copper(II) acetate
作者:Ana Martínez-Asencio、Diego J. Ramón、Miguel Yus
DOI:10.1016/j.tetlet.2009.11.009
日期:2010.1
Copper(II) acetate is a versatile, cheap, and simple catalyst for the selective N-monoalkylation of amino derivatives with poor nucleophilic character, such as aromatic and heteroaromatic amines as well as sulfonamides, using in all cases primary alcohols as initial source of the electrophiles, through a hydrogen autotransfer process. In the case of sulfonamides, the monoalkylation process followed