m-Chloroperbenzoic acid → 1-methanesulphonyl-hexahydro-4,5-epoxy-1H-azepine

関与物質

反応手順

11.7 g (0.067 mol) of 1-methanesulphonyl-2,3,6,7-tetrahydro-1H-azepine are dissolved in 230 ml of methylene chloride and the solution is treated with 23 g (0.13 mol) of m-chloro-perbenzoic acid in portions. A white suspension soon forms and this is stirred for a further 24 hours at room temperature. The m-chlorobenzoic acid which has precipitated is filtered off and the filtrate is washed with a saturated aqueous solution of sodium carbonate, then with aqueous iron-II sulphate solution, then with 0.1 N sodium hydroxide solution and finally with water and dried over sodium sulphate. On concentrating the solution under a water pump vacuum, while crystals of 1-methanesulphonyl-hexahydro-4,5-epoxy-1H-azepine are obtained and these are isolated by filtration; melting point 133°-134°.

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