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Synthesis of Carbenes Through Substitution Reactions at a Carbene Center

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Science  29 Aug 2003:
Vol. 301, Issue 5637, pp. 1223-1225
DOI: 10.1126/science.1086860

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Abstract

An (amino)(phosphino) carbene can be transformed into (amino)(phosphonio) carbenes, which undergo nucleophilic intermolecular as well as intramolecular substitution reactions at the carbene center. A variety of carbenes can be synthesized starting from a single carbene precursor. The resulting gamut of electronic and steric effects possible should open the way not only to a detailed study of the mechanism, but also to the subsequent improvement of catalytic reactions that involve carbene-transition metal complexes.

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