反应详情

Magnesium turnings for Grignard (0.12 g, 4.71 mmoles) in ethyl ether (8 ml) were put under N2 and stirring at room temperature. Ethyl bromide (2 drops) and then, slowly, bromobenzene (0.52 ml, 4.93 mmoles) in ethyl ether (10 ml) and 1,2-dibromoethane (2 drops) were added. The temperature arose to reflux and was kept as such for 1 hour. The mixture was treated with 2-(4,4-dimethyl-4,5-dihydro-oxazol-2-yl)-5-methoxy-benzaldehyde (1 g, 4.29 mmoles), prepared as described in example 2, and kept at reflux for a further hour, then cooled, poured into water/ice and extracted more times with ethyl acetate. The organic phases were washed with water, anhydrified and brought to dryness to give 1.44 g of the title compound (yield: 98%).

1. temperatureto reflux
2. customsuch for 1 hour
3. customprepared
4. temperatureat reflux for a further hour
5. temperaturecooled
6. extractionextracted more times with ethyl acetate
7. washThe organic phases were washed with water