A visible-light RuII photoredox Meerwein synthesis of isochromanones and isochromenones is described starting from diazonium salts of differently substituted anthranilic acids and various alkenes. This approach has allowed the reliable and efficient preparation of structures found in many biologically active molecules or used in materials chemistry.
Thermal addition reactions to benzocyclobutenones studied by flash photolysis
作者:P. Schiess、M. Eberle、M. Huys-Francotte、J. Wirz
DOI:10.1016/s0040-4039(01)80210-0
日期:1984.1
Ortho-quinoid vinylketenes 2 have been generated through flashphotolysis of benzocyclobutenones 1. A kinetic study of intermolecular addition reactions of 2 competing with the recyclization 2 → 1 reveals strikingly different substituent effects for the addition of methanol and of dienophiles.
A new approach to the synthesis of 3,4-dihydroisocoumarin derivatives
作者:Mykola D. Obushak、Vasyl S. Matiychuk、Victor V. Turytsya
DOI:10.1016/j.tetlet.2009.08.024
日期:2009.11
A new, simple, one-step synthesis of 3-substituted 3,4-dihydroisocoumarins is developed. The products are obtained by the reaction of o-methoxycarbonyl arenediazonium bromides with unsaturated compounds in the presence of CuBr as a catalyst. (C) 2009 Elsevier Ltd. All rights reserved.