反应详情

To a solution of 2-hydroxy-2,3-dihydro-3,3-dimethylbenzofuran-5-yl methanesulphonate (12 parts) in ether (46 parts) was added methyl isocyanate (4.5 parts) and triethylamine (0.3 parts). The solution was left at room temperature for 2 hours and the solvent evaporated off. The crude product was recrystallised from a mixture of benzene and light petroleum to give 2-methylcarbamoyloxy-2,3-dihydro-3,3-dimethylbenzofuran-5-yl methanesulphonate, melting point 126°-127°C.

1. customthe solvent evaporated off
2. customThe crude product was recrystallised from a mixture of benzene and light petroleum