Acetic Acid → 7-Nitro-3-(propan-2-yl)-2,3,4,5-tetrahydro-1H-3-benzazepine

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Reaction Steps

0.96 g (5.00 mmol) 7-nitro-2,3,4,5-tetrahydro-1H-benzo[d]azepine and 0.404 ml (5.50 mmol) acetone are dissolved in 20 ml THF, then 0.414 ml (7.50 mmol) acetic acid and 0.10 g p-toluenesulphonic acid are added and the mixture is stirred for 30 min at room temperature. At room temperature 1.378 g (6.50 mmol) sodium triacetoxyborohydride are added and stirred for 23 h. Then the mixture is made alkaline with sat. Sodium hydrogen carbonate solution and extracted with ethyl acetate, then the organic phase is dried with sodium sulphate and concentrated by evaporation i.vac.

Provenance & Evidence