Copper-Catalyzed Three-Component Carboazidation of Alkenes with Acetonitrile and Sodium Azide
作者:Ala Bunescu、Tu M. Ha、Qian Wang、Jieping Zhu
DOI:10.1002/anie.201705353
日期:2017.8.21
A copper-catalyzed three-component reaction of alkenes, acetonitrile, and sodium azide afforded γ-azido alkyl nitriles by formation of one C(sp3)−C(sp3) bond and one C(sp3)−N bond. The transformation allows concomitant introduction of two highly versatile groups (CN and N3) across the double bond. A sequence involving the copper-mediated generation of a cyanomethyl radical and its subsequent addition
The invention provides tricyclic heterocyclic compounds, pharmaceutically acceptable salts, pro-drugs, biologically active metabolites, stereoisomers and isomers thereof wherein the variables are defined herein. The compounds of the invention may be useful for treating immunological and oncological conditions.
This manuscript describes the synthesis of γ-lactam from the nitrogen insertion reaction of cyclobutanones using an oxime as an aminating reagent with a catalytic amount of Brønstedacid. This method was employed with a more stable oxime reagent, which is a precursor analog of hydroxylamine derivatives with explosive properties. The reaction was tolerated by various substituted cyclobutanones and less
Synthesis of 5-alkyl-5-aryl-γ-lactams from 1-aryl-substituted nitroalkanes and methyl acrylate via Michael addition and reductive lactamization
作者:Jingjing Xu、Xingyao Li、Jinlong Wu、Wei-Min Dai
DOI:10.1016/j.tet.2014.04.074
日期:2014.6
A general method for accessing 5-alkyl-5-aryl-gamma-lactams has been developed using readily available aryl bromides, nitroalkanes, and methyl acrylate as the starting materials. The palladium-catalyzed arylation of nitroalkanes gave the 1-aryl-substituted nitroalkanes, which underwent the DBU-mediated Michael addition with methyl acrylate at room temperature to afford the methyl 4-aryl-4-nitroalkanoates. The latter were then subjected to the nitro reduction using NaBH4-NiCl2 center dot 6H(2)O in MeOH at 0 degrees C to furnish, after treatment with aqueous K2CO3 at room temperature, the 5-alkyl-5-aryl-gamma-lactams in good to excellent overall yields. Selected examples of N-alkylation of the gamma-lactams were also illustrated. (C) 2014 Elsevier Ltd. All rights reserved.
MILLER R. D.; GOELITZ P., J. ORG. CHEM., 1981, 46, NO 8, 1616-1618