反应详情

15.6 g (0.05 mol) of 1-[p-(2-acetylamino-2-carbomethoxyvinyl)-phenoxy]-2,3-epoxy-propane are dissolved in 50 ml of absolute tetrahydrofurane, 4.25 ml (0.05 mol) of isopropylamine are added and thereafter the mixture is heated for 18 hours to the boil under a reflux condenser. It is then evaporated in vacuo and the resulting crude base is dissolved in ethyl acetate. The solution is extracted three times with 20 ml of 1 N hydrochloric acid at a time. The hydrochloric acid extracts are brought to pH 8 with sodium carbonate solution and the crude base which hereupon has separated out is extracted with ethyl acetate. The extract is washed with water, dried over sodium sulphate and evaporated in vacuo. 17 g of crude base are obtained as a brownish oil. This is dissolved in 20 ml of acetone and mixed with a solution of 9 g of N-cyclo-hexylsulphamic acid in 70 ml of acetone. After addition of ether, the N-cyclohexylsulphamate of 1-[p-(2-acetylamino-2-carbomethoxy-vinyl)-phenoxy]-2-hydroxy-3-isoproylamino-propane, melting point 121°-125°C, is obtained.

1. temperaturethe mixture is heated for 18 hours to the boil under a reflux condenser
2. customIt is then evaporated in vacuo
3. dissolutionthe resulting crude base is dissolved in ethyl acetate
4. extractionThe solution is extracted three times with 20 ml of 1 N hydrochloric acid at a time
5. customthe crude base which hereupon has separated out
6. extractionis extracted with ethyl acetate
7. washThe extract is washed with water
8. dry with materialdried over sodium sulphate
9. customevaporated in vacuo
10. custom17 g of crude base are obtained as a brownish oil