Reaction of N-Haloamide. XX. Bromo-formyloxylation of α, β-Unsaturated Esters with N, N-Dibromobenzenesulfonamide and Formic Acid

α, β-Unsaturated esters were made to react with N, N-dibromobenzenesulfonamide and formic acid in chloroform to give bromo-formyloxyesters. Methyl acrylate (1a), ethyl crotonate (2a), ethyl trans-cinnamate (3a), methyl tiglate (4a), methyl methacrylate (5a), and methyl phenylacrylate (6a) gave methy...

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Veröffentlicht in:Chemical & pharmaceutical bulletin 1974/07/25, Vol.22(7), pp.1646-1651
Hauptverfasser: UENO, YOSHIO, YAMASAKI, AKEMI, TERAUCHI, HIROMI, TAKEMURA, SHOJI
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Sprache:eng
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Zusammenfassung:α, β-Unsaturated esters were made to react with N, N-dibromobenzenesulfonamide and formic acid in chloroform to give bromo-formyloxyesters. Methyl acrylate (1a), ethyl crotonate (2a), ethyl trans-cinnamate (3a), methyl tiglate (4a), methyl methacrylate (5a), and methyl phenylacrylate (6a) gave methyl 2-bromo-3-formyloxypropionate (1b), ethyl erythro-2-bromo-3-formyloxybutyrate (2b), ethyl erythro-2-bromo-3-formyloxy-3-phenylpropionate (3b), methyl erythro-2-bromo-3-formyloxy-2-methylbutyrate (4b), a mixture of methyl 3-bromo-2-formyloxy-2-methylpropionate (5b) and methyl 2-bromo-3-formyloxy-2-methylpropionate (5c), and methyl 3-bromo-2-formyloxy-2-phenylpropionate (6b) respectively in good yields.
ISSN:0009-2363
1347-5223
DOI:10.1248/cpb.22.1646