反应详情

To a solution of 32.8 g (0.0775 mole) of (Z)-3-ethoxycarbonyl-4-(4-chlorophenyl)-4-(4-methanesulphonylphenyl)but-3-enoic acid, prepared in example 3, in 90 ml of anhydrous tetrahydrofuran are added dropwise 15.5 ml (0.155 mole) of borane/dimethyl sulphide complex. The mixture is stirred at room temperature for 8 hours and 23.5 ml of methanol are added dropwise. The mixture is evaporated to dryness in vacuo and the residue is dissolved in ethyl acetate. After washing with potassium carbonate solution, the organic phase is separated, dried over magnesium sulphate and evaporated in vacuo to give 30.8 g of ethyl (Z)-3-(4-chlorophenyl)-3-(4-methanesulphonylphenyl)-2-(2-hydroxyethyl)prop-2-enoate as crystals with a melting point of 128° C. after recrystallisation from isopropanol.

1. additionare added dropwise 15.5 ml (0.155 mole) of borane/dimethyl sulphide complex
2. customThe mixture is evaporated to dryness in vacuo
3. dissolutionthe residue is dissolved in ethyl acetate
4. washAfter washing with potassium carbonate solution
5. customthe organic phase is separated
6. dry with materialdried over magnesium sulphate
7. customevaporated in vacuo