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Observations on the enforced orthogonality concept for the synthesis of fully hindered biaryls by a tin-free intramolecular radical ipso substitution

Bonfand, E; Forslund, L; Motherwell, WB; Vazquez, S; (2000) Observations on the enforced orthogonality concept for the synthesis of fully hindered biaryls by a tin-free intramolecular radical ipso substitution. SYNLETT (4) 475 - 478.

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Abstract

Hindered biaryls have been simply prepared using diazonium salt precursors and an intramolecular free radical [1,5] ipso substitution protocol. The introduction of an additional substituent ortho to the diazonium group in the sigma aryl radical donor further enforces the formation of ipso substitution products and hence fully hindered biaryls are the favoured products.

Type:Article
Title:Observations on the enforced orthogonality concept for the synthesis of fully hindered biaryls by a tin-free intramolecular radical ipso substitution
Keywords:radical reactions, biaryls, titanium trichloride, substituent, effects, ipso substitution, CROSS-COUPLING REACTIONS
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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