反应详情

A solution of dry methyl methylthiomethyl sulphoxide (7.0 g., 0.056 mole) in dry tetrahydrofuran (25 ml.) was added dropwise to a stirred suspension of 50% sodium hydride in oil dispersion (3.0 g., 0.62 mole) in dry tetrahydrofuran (50 ml.) under nitrogen at ambient temperature. This mixture was stirred for 0.5 hours and a solution of 5-cyanobenzo(b)furan (8.0 g., 0.056 mole) in dry tetrahydrofuran (25 ml.) added dropwise. The now reddish suspension was stirred at 50°-60° C. overnight, and the resulting thick suspension cooled and treated dropwise with water (5 ml.). Methylene chloride (100 ml.) was next added, followed by magnesium sulphate, and the mixture filtered. Evaporation of the filtrate in vacuo furnished a brown solid (15 g.), which was triturated with ethyl acetate, collected, washed with ethyl acetate and then hexane and dried, in vacuo, to give 1-amino-1[5-benzo(b)furanyl]-2-methylsulphinyl-2-methylthio-ethylene (12.7 g.) as a cream solid, m.p. 157°- 159° C. (decomp.).

1. stirringThe now reddish suspension was stirred at 50°-60° C. overnight
2. temperaturethe resulting thick suspension cooled
3. filtrationthe mixture filtered
4. customEvaporation of the filtrate in vacuo
5. customfurnished a brown solid (15 g.), which
6. customwas triturated with ethyl acetate
7. customcollected
8. washwashed with ethyl acetate
9. dry with materialhexane and dried, in vacuo