Catalytic control of reactions of dipoles and carbenes; an easy and efficient synthesis of cycloheptatrienes from aromatic compounds by an extension of Buchner's reaction
作者:André J. Anciaux、Albert Demonceau、André J. Hubert、Alfred F. Noels、Nicole Petiniot、Philippe Teyssié
DOI:10.1039/c39800000765
日期:——
salts from strong carboxylic acids [particularly rhodium(II) trifluoroacetate] are novel and highlyefficient catalysts for the preparation of substituted cycloheptatriene carboxylates from aromatic hydrocarbons and diazo-esters, and in contrast with the classical Buchner procedures these rhodium catalysts lead specifically to the 1-isomer (3), avoiding its subsequent prototropic conversion into conjugated
Regioselectivity in Thermal Rhodium(II)-Catalysed Büchner-Type Reactions of Substituted Aryl Halides: Studies towards the Synthesis of Halide-Substituted Cycloheptatrienes
作者:David Spring、Emma Wyatt、Warren Galloway
DOI:10.1055/s-0030-1260562
日期:2011.6
The results of Buchner-type reactions of various substi- tuted aryl halide derivatives with ethyl diazoacetate are presented, together with a discussion of factors affecting the regioselectivity of these processes.