Solvent, chelation and concentration effects on the benzannulation reaction of chromium carbene complexes and acetylenes

KS Chan, GA Peterson, TA Brandvold, KL Faron…

Index: Chan, Kin Shing; Peterson, Glen A.; Brandvold, Timothy A.; Faron, Katherine L.; Challener, Cynthia, A.; et al. Journal of Organometallic Chemistry, 1987 , vol. 334, p. 9 - 56

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Abstract

Abstract The reactions of a number of chromium carbene complexes (CO) 5 Cr C (OMe) R (R= Ph, o-OMePh, p-OMePh, oO-tBuPh, 1-C 6 H 9, 1-C 5 H 7 O) were examined with a variety of acetylenes (R′ CCR 2, R 1, R 2= H, Me, Et, n-Pr, Ph, SiMe 3) in solvents ranging from low to high coordinating ability. The high selectivity for the benzannulated product from the reactions of simple α, β-unsaturated complexes is not affected by changes in solvent ...

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