反应详情

Dissolve 22.1 g 4-cyanobenzoic acid and 28.2 ml t-butanol in 500 ml DMF. Add 9.15 g 4-(dimethylamino) pyridine and 31.5 g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride. Stir the mixture overnight at RT. Remove the DMF in vacuo, and partition the resultant residue between ethyl acetate and water. Wash the organic layer successively with cold 0.5 N aqueous HCl, water, 5% aqueous NaHC03 and brine. Dry the organic layer over MgSO4 and evaporate the solvent to obtain the title compound. m.p. 75°-78° C. Rf (silica gel; 5% EtOAc in hexane)=0.3; IR 2240 cm-1 ; 1730 cm-1.

1. customRemove the DMF in vacuo
2. custompartition the resultant residue between ethyl acetate and water
3. washWash the organic layer successively with cold 0.5 N aqueous HCl, water, 5% aqueous NaHC03 and brine
4. dry with materialDry the organic layer over MgSO4
5. customevaporate the solvent