An efficient modification of the Hofmann rearrangement: synthesis of methyl carbamates
作者:Pranjal Gogoi、Dilip Konwar
DOI:10.1016/j.tetlet.2006.11.134
日期:2007.1
A series of methyl carbamates was synthesized using NaOCl as an oxidant in the presence of KF/Al2O3/MeOH at reflux in excellent yields.
在KF / Al 2 O 3 / MeOH的存在下,使用NaOCl作为氧化剂,以回流法合成了一系列氨基甲酸酯,收率很高。
POLYMERIZATION, OXYGENATION AND ISOMERIZATION OF ISOCYANIDES UNDER IRRADIATION
作者:Joseph H. Boyer、V. T. Ramakrishnan、K. G. Srinivasan、A. J. Spak
DOI:10.1246/cl.1981.43
日期:1981.1.5
Irradiation in the presence of triplet oxygen polymerized both 2,4-dimethyoxyphenyl and cyclohexyl isocyanide and photoautoxidized each into the corresponding isocyanate. The aryl, but not the alicyclic, isocyanide also photoisomerized into a cyanide. The consumption of an isocyanide was enhanced in the presence of certain aromatic hydrocarbons, e.g., naphthalene and phenanthrene, but was diminished
Practical Access to meta‐Substituted Anilines by Amination of Quinone Imine Ketals Derived from Anisidines: Efficient Synthesis of Anti‐Psychotic Drugs
is reported based on a one-pot procedure. The strategy is based on direct C−N bond formation for the practicalsynthesis of meta-substituted anilines, thus reversing the conventional site-selectivity. A concise and efficientsynthesis of anti-psychotics and in particular of anti-schizophrenic drugs is shown.
Herein, we develop a metal-free, nondirected, site-selective, one-pot approach to meta-arylation of arylamines. This Brønsted acid-catalyzed, direct C–C bond formation offers a broad substrate scope and scalability and creates the ideal conditions for overriding the conventional site-selectivity to furnish meta-substituted anilines. Additionally, the protocol applies to the meta-allylation of anilines