Reaction of Carbanions Derived From α,β-Unsaturated Nitro Compounds With Electrophiles to Give α-Substituted Products
作者:Noboru Ono、Isami Hamamoto、Akio Kamimura、Aritsune Kaji、Rui Tamura
DOI:10.1055/s-1987-27907
日期:——
The reaction of α,β-unsaturated nitro compounds with aldehydes or electron deficient olefins, in the presence of a base provides a simple method for the preparation of α-substituted allylic nitro compounds. The initially formed allylic carbanion reacts regioselectively at the position α to the nitro group. The products formed, γ,δ-unsaturated β-nitro alcohols 2 and δ,ε-unsaturated γ-nitro ketones, esters, nitriles, and sulfones 3, can serve as useful synthetic intermediates.
α,β-不饱和硝基化合物与醛或电子缺乏的烯烃在碱的存在下反应,提供了一种制备α-取代烯丙基硝基化合物的简单方法。最初形成的烯丙基负离子选择性地在与硝基相邻的α位置反应。所形成的产物包括γ,δ-不饱和β-硝基醇2,以及δ,ε-不饱和γ-硝基酮、酯、腈和磺酰基化合物3,这些都可以作为有用的合成中间体。