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Then, 2.02 g (12.8 mmol) of the above (+)-2-methyl octanoic acid, 2.02 g (11.9 mmol) of 4-hydroxy biphenyl and 10 ml of toluene were charged into a flask, and further 1.0 ml (13.7 mmol) of thionyl chloride was added with stirring, which were then reacted for 9 hours while maintaining at a temperature of 70°~80° C. After the completion of the reaction, the reaction mixture was cooled to room temperature, added with water to decompose excess thionyl chloride, washed with water and then dried on anhydrous magnesium sulfate. After the solvent was distilled off, the residue was purified through a column chromatography of silica gel to obtain 3.43 g of an oily (+)-biphenyl-2-methyloctanoate having a specific rotary power [α]25D =+16.3° (2.6% by weight, in chloroform).

1. customwhich were then reacted for 9 hours
2. temperaturewhile maintaining at a temperature of 70°~80° C
3. customAfter the completion of the reaction
4. washwashed with water
5. dry with materialdried on anhydrous magnesium sulfate
6. distillationAfter the solvent was distilled off
7. customthe residue was purified through a column chromatography of silica gel