Intramolecular cyclization using methyl(bismethylthio)sulphonium salts. Part 1. 2,3-Dihydrobenzofurans
作者:Giuseppe Capozzi、Vittorio Lucchini、Franco Marcuzzi、Giorgio Modena
DOI:10.1039/p19810003106
日期:——
Methyl(bismethylthio)sulphonium hexachloroantimonate (1a) reacts under mild conditions with 2-allylphenol (3a) to give 2-(methylthiomethyl)-2,3-dihydrobenzofuran (4a). Methylthiolation at position 5 in the heterocycle may also occur. With 4-substituted 2-allylphenols (3b–d)(substituents: methyl,chloro,nitro) only the corresponding 5-substituted 2-(methylthiomethyl)-2,3-dihydrobenzofurans (4b–d) are
六氯锑酸甲基(双甲硫基)磺酸ium(1a)与2-烯丙基苯酚(3a)在温和条件下反应,生成2-(甲硫基甲基)-2,3-二氢苯并呋喃(4a)。杂环中第5位的甲硫醇也可能发生。用4-取代的2-烯丙基苯酚(3b-d)(取代基:甲基,氯,硝基)只能得到相应的5-取代的2-(甲硫基甲基)-2,3-二氢苯并呋喃(4b-d)。