反应详情

Next, S(+)-2-octanol (50 g, 0.38 mol) was dissolved in dry pyridine (150 ml), and to the solution was dropwise added under cooling, a solution of 4'-benzyloxybiphenyl-4-carboxylic chloride (112 g, 0.35 mol) dissolved in dry toluene (150 ml), followed by agitating the mixture at about 50°-60° C. for 2 hours, thereafter adding water (300 ml) and toluene (300 ml), agitating the mixture, washing the separated toluene layer with 6N-HCl, then with 2N-NaOH aqueous solution and further with water until the washing water became neutral, drying the toluene layer with anhydrous sodium sulfate and distilling off toluene to obtain 4'-benzyloxybiphenyl-4-carboxylic acid 1-methylheptyl ester (53 g), dissolving this ester (53 g, 0.13 mol) in ethanol (500 ml) and reducing it in the presence of palladium/carbon (Pd/C) 5 g) to obtain 4'-hydroxy-4-(1-methyl-heptyloxycarbonyl)biphenyl (34 g). (ii) Preparation of 4-octyloxycarbonyloxybenzoic chloride

1. additionto the solution was dropwise added
2. temperatureunder cooling
3. washwashing the separated toluene layer with 6N-HCl
4. dry with materialdrying the toluene layer with anhydrous sodium sulfate
5. distillationdistilling off toluene