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Reactivity of carbanions of Fischer-type carbene complexes with pyrylium salts. Synthesis and characterization of new gamma-methylenepyran carbene complexes via an addition-oxidation-deprotonation process

Abstract : The condensation reaction between gamma-unsubstituted pyrylium salts and carbanions of Fischer-type carbene complexes allowed the synthesis of new gamma-methylenepyran carbene complexes. NMR data, single crystal X-ray analysis, and DFT calculations suggest that these complexes have a partial pyrylium character due to the pi electron-accepting ability of the carbenic fragment and to the electron-releasing properties of the methylenepyran part. (C) 2002 Elsevier Science Ltd. All rights reserved.
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https://hal.univ-brest.fr/hal-01175779
Contributor : Nicolas Le Poul <>
Submitted on : Sunday, July 12, 2015 - 9:17:02 PM
Last modification on : Tuesday, November 5, 2019 - 3:44:01 PM

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B. Caro, P. Le Poul, F. Robin-Le Guen, J. Y. Saillard, S. Kahlal, et al.. Reactivity of carbanions of Fischer-type carbene complexes with pyrylium salts. Synthesis and characterization of new gamma-methylenepyran carbene complexes via an addition-oxidation-deprotonation process. Tetrahedron, Elsevier, 2002, 58 (37), pp.PII S0040-4020(02)00800-1. ⟨10.1016/S0040-4020(02)00800-1⟩. ⟨hal-01175779⟩

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