Radical Aryl Migration from Boron to Carbon
نویسندگان
چکیده
منابع مشابه
Raman scattering from boron-substituted carbon films.
Raman scattering studies of B xC12x films have been carried out for boron concentrations in the range 0<x<0.17. The spectra exhibit two broad bands, a graphitic mode (G) centered between 1535 and 1590 cm and a disorder-induced mode ~D! centered between 1345 and 1370 cm. The G mode is observed to soften as a result of boron substitution, and this behavior has been explained using a simple two-di...
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A novel radical phosphinylation of α,α-diaryl allylic alcohols with arylphosphine oxides was described for the direct preparation of α-aryl-β-phosphinylated carbonyl ketones in medium to good yields via 1,2-aryl migration. In this reaction, formation of new C(Ar)-C(sp(3)) and C(sp(3))-P bonds was observed.
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A copper-catalyzed radical 1,2-aryl migration in α,α-diaryl allylic alcohols is developed, leading to β-silyl carbonyl compounds in moderate to good yields. The migration of aryls with lower aromaticity is favored. This procedure features the employment of silanes as commercially available materials.
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Medium-sized and medium-bridged rings are attractive structural motifs in natural products and therapeutic agents. Due to the unfavourable entropic and/or enthalpic factors with these ring systems, their efficient construction remains a formidable challenge. To address this problem, we herein disclose a radical-based approach for diversity-oriented synthesis of various benzannulated carbon- and...
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(E)-3-Ylideneoxindoles are prepared in methanol in reasonable to good yields, as adducts of photochemical 5-exo-trig of aryl radicals, in contrast to previously reported analogous radical cyclizations initiated by tris(trimethylsilyl)silane and azo-initiators that gave reduced oxindole adducts.
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ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 2021
ISSN: 0002-7863,1520-5126
DOI: 10.1021/jacs.1c04217