反应详情

42.5 g (0.2 M) of ethyl 2-oxo-2-(4-chlorophenyl)acetate are placed in 400 ml of CH2Cl2 in a 500 ml reactor. 22.8 g (0.1 M) of 2,2-diphenylpropane-1,3-diol and then 14.2 g (0.1 M) of BF3.Et2O are added. The mixture is left to react with stirring for 72 h at room temperature. The reaction mixture is taken up in NaHCO3 solution. The organic phase is washed with saturated NaCl solution. After drying over Na2SO4 and concentration, a very thick oil is obtained. 150 ml of isopropyl ether are added and a white precipitate forms. After filtration, 30 g of product melting at 156-158° C. are obtained (yield: 71%).

1. waitThe mixture is left
2. customto react
3. washThe organic phase is washed with saturated NaCl solution
4. dry with materialAfter drying over Na2SO4 and concentration
5. customa very thick oil is obtained
6. filtrationAfter filtration, 30 g of product melting at 156-158° C.
7. customare obtained (yield: 71%)