反应详情

In 100 ml of methyl-ethyl-ketone 4.2 g (20 millimoles) of 6,7-dihydroxy-2,2-dimethyl-4-chromanone are dissolved and to the solution thus obtained 4.1 g (30 millimoles) of potassium carbonate, 0.5 g of potassium iodide and 3.3 g (2.6 millimoles, 24 millimoles) of sec. butyl bromide are added under stirring. The reaction mixture is heated to boiling for 12 hours. The reaction mixture is worked up according to Example 17. Thus 4.5 g of the desired compound are obtained, yield 86%, mp.: 114°-116° C.

1. additionare added
2. temperatureThe reaction mixture is heated