PROCESS FOR PREPARING HIGH PURITY 1-BROMOETHYL CARBOXYLATE

摘要

PURPOSE: the 1-bromoethyl carboxylates be high-purity which there is high conversion ratio and with good industrialized utilization rate. Vinyl carboxylates (the formula of CONSTITUTION:1 equivalents; R is methyl or tert-butyl) and 0.5- 1.The hydrobromic acid gas of 5 equivalents provides 1-bromoethyl carboxylates (Formulas I) at 50 degrees Celsius of -78-. Therefore, being obtained from PBr3 and H2O for 425 bromination hydrogen adds the vinyl acetate of 431 g at -10 degree Celsius 2, places 2 hours at room temperature. Obtained compound is distilled at 40 degrees Celsius, and decompression provides 836 title compounds.