反应详情

To a cooled solution of 2-hydroxy-2,3-dihydro-3,3-dimethylbenzofuran-5-yl methanesulphonate (8.0 parts) in dry pyridine (42 parts) was added benzoyl chloride (4.75 parts) at such a rate that the temperature did not exceed 10° C. After one hour the mixture was poured into a slight excess of dilute hydrochloric acid. The product was extracted with ether and the ethereal solution washed, dried with sodium sulphate and evaporated to give an oil which solidified on scratching. The solid was recrystallised from a mixture of benzene and light petroleum to give 2-benzoyloxy-2,3-dihydro-3, 3-dimethylbenzofuran-5-yl methanesulphonate (5.1 parts), melting point 102°-104° C.

1. customdid not exceed 10° C
2. extractionThe product was extracted with ether
3. washthe ethereal solution washed
4. dry with materialdried with sodium sulphate
5. customevaporated
6. customto give an oil which
7. customThe solid was recrystallised from a mixture of benzene and light petroleum