Volume 58, Issue 7 pp. 2088-2092
Communication

Donor Rhodium Carbenes by Retro-Buchner Reaction

Mauro Mato

Mauro Mato

Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain

Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, C/ Marcel⋅li Domingo s/n, 43007 Tarragona, Spain

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Prof. Antonio M. Echavarren

Corresponding Author

Prof. Antonio M. Echavarren

Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain

Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, C/ Marcel⋅li Domingo s/n, 43007 Tarragona, Spain

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First published: 18 December 2018
Citations: 43

Graphical Abstract

Successful iteration: Donor rhodium(II) carbenes are generated by retro-Buchner reaction (decarbenation) of 7-substituted 1,3,5-cycloheptatrienes, leading to broad-scope synthesis of allylsilanes by Si−H insertion and a new method for the iterative vinylogation of aldehydes.

Abstract

Rhodium carbenes are key intermediates in a range of cycloadditions and insertion reactions. Herein, we report the first generation of donor RhII carbenes by decarbenation of 7-substituted 1,3,5-cycloheptatrienes. This discovery unlocks an improved retro-Buchner-cyclopropanation sequence, a Si−H insertion reaction for a broad-scope synthesis of allylsilanes, and a new method for the vinylogation of aldehydes. The last strategy led to the development of an iterative synthesis of E-polyenes, and to the total synthesis of navenones B and C.

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