反应详情

温度

70 °C

To a solution of 4-methylcarbonyloxy-4'-hydroxybiphenyl (2.3 g) and triethylamine (1.1 g) in methylene chloride (50 ml) was gradually added dropwise undecanoyl chloride (n-C10H21COCl) (2.1 g). Dimethylaminopyridine (0.3 g) was further added thereto and the mixture was stirred for 24 hours. After the solvent was distilled off, the residue was added to tetrahydrofuran containing tert-butylamine and the mixture was refluxed at 70° C. for 2 hours and hydrolyzed. After the solvent was distilled off, dilute hydrochloric acid was added to the residue to render the solution neutral and the solution was extracted with diethyl ether. After the solvent was distilled off, the residue was washed with hexane and recrystallized from water/ethanol (1/9) solution to obtain the titled compound (about 1.4 g).

1. distillationAfter the solvent was distilled off
2. additionthe residue was added to tetrahydrofuran
3. additioncontaining tert-butylamine
4. distillationAfter the solvent was distilled off
5. additiondilute hydrochloric acid was added to the residue
6. extractionthe solution was extracted with diethyl ether
7. distillationAfter the solvent was distilled off
8. washthe residue was washed with hexane
9. customrecrystallized from water/ethanol (1/9) solution