Diastereoselective intramolecular cyclization/Povarov reaction cascade for the one-pot synthesis of polycyclic quinolines
作者:E. A. Kuznetsova、A. V. Smolobochkin、T. S. Rizbayeva、A. S. Gazizov、J. K. Voronina、O. A. Lodochnikova、D. P. Gerasimova、A. B. Dobrynin、V. V. Syakaev、D. N. Shurpik、I. I. Stoikov、A. R. Burilov、M. A. Pudovik、O. G. Sinyashin
DOI:10.1039/d2ob01031c
日期:——
method for the synthesis of complex alkaloid-like aza-heterocycles has been developed through the Povarov reaction of in situ generated 2-oxoimidazolium cations. The reaction lead to the formation of 2 C–N, 2 C–C bonds and three stereocentres, and features excellent regio- and diastereoselectivity. Based on the controlled experiments and quantum chemistry data, the mechanism of the reaction cyclization
A versatile way for the synthesis of monomethylamines by reduction of <i>N</i>-substituted carbonylimidazoles with the NaBH<sub>4</sub>/I<sub>2</sub> system
作者:Lin Chen、Xuan Zhou、Zhiyong Chen、Changxu Wang、Shunjie Wang、Hanbing Teng
DOI:10.3762/bjoc.18.104
日期:——
yields from a wide range of raw materials including amines (primaryamines and secondaryamines), carboxylic acids and isocyanates. Besides, an interesting reduction selectivity was observed. Exploration of the reaction process shows that it undergoes a two-step pathway via a formamide intermediate and the reduction of the formamide intermediate to monomethylamine as the rate-determining step. This