Copper(I)-Catalyzed IntramolecularAddition of<i>N</i>-Chloroamides to Double Bonds;an Efficient Synthesis of Lactams from Unsaturated Amides
作者:Richard Göttlich、Iris Anne Schulte-Wülwer、Juho Helaja
DOI:10.1055/s-2003-40997
日期:——
Copper(1) salts catalyse the intramolecular addition of N-chloramides to carbon-carbon double bonds leading to lactams in almost quantitative yield.
铜 (1) 盐催化 N-氯酰胺分子内加成到碳-碳双键上,从而以几乎定量的收率生成内酰胺。
Anti-Beckwith stereoselectivity in amidyl radical cyclisations: Bu3SnH-mediated 5-exo-trig acyl mode cyclisation of 2-substituted pent-4-enamide radicals
作者:Andrew J. Clark、Robert P. Filik、Gerard H. Thomas、John Sherringham
DOI:10.1016/j.tetlet.2013.05.109
日期:2013.7
2-Substituted amidyl radicals derived from 8a-d and 9a-d undergo acyl mode 5-exo-trig cyclisation to give 3,5-trans pyrrolidinones 11a-d and 14a-d as the major products in low diastereoselectivity (de = 9-36%). The steric nature of the nitrogen substituent attached to the amidyl radical does not have a significant effect on selectivity. The stereochemical outcome is opposite to that expected based upon applying the Beckwith rule. (C) 2013 Elsevier Ltd. All rights reserved.
Copper(I) Catalysts for the Stereoselective Addition ofN-Chloroamines to Double Bonds: A Diastereoselective Radical Cyclisation