反应详情

To a round bottom flask of 100 ml was placed 1.5 g of 4'-octylbiphenyl-4-carboxylic acid, added 3 g of thionyl chloride, and further added a small amount of N,N-dimethyl formamide, and then the contents in the flask were subjected to reflux for 4 hours. An excess amount of thionyl chloride was distilled off to obtain 1.6 g of 4'-octylbiphenyl-4-carboxylic acid chloride. To this acid chloride was added a solution prepared by dissolving 0.6 g of optically active 4-hydroxy benzoic acid 2-octyl ester having an optical purity of 98% e.e., 0.4 g of triethylamine, and 0.15 g of dimethylamino pyridine in 50 ml of methylene chloride, and then the contents in the flask were stirred a whole day and night. After finishing the reaction, white insoluble matters produced were filtered off. After methylene chloride layer formed was washed sufficiently with a diluted hydrochloric acid and water, and dried, the organic solvent was separated under a reduced pressure. Crude products thus obtained were purified by column chromatography and recrystallization to obtain an objective compound having an optical purity of 98% e.e.

1. customTo a round bottom flask of 100 ml was placed
2. temperatureto reflux for 4 hours
3. distillationAn excess amount of thionyl chloride was distilled off