تفاعل #2329

معادلة التفاعل

Bromine

product

methyl 4-(2,2-dimethylacetyl)-phenoxyacetate

→

methyl 4-(2-bromo-2,2-dimethylacetyl)phenoxyacetate

المذيبات

carbon tetrachloride

ظروف التفاعل

المعالجة

1. 1
   أخرىthe solvent was evaporated in vacuo
2. 2
   أخرىto give an orange oil
3. 3
   ترشيحA solution of this oil, in a small volume of dichloromethane, was filtered through silica
4. 4
   أخرىthe clear filtrate, on evaporation

الإجراء التجريبي

Bromine (2.09 ml) was added dropwise over ten minutes to a stirred solution of the product of step (i) above (9.44 g) in carbon tetrachloride (200 ml). The solution was stirred for 16 hours, then the solvent was evaporated in vacuo to give an orange oil. A solution of this oil, in a small volume of dichloromethane, was filtered through silica and the clear filtrate, on evaporation, gave methyl 4-(2-bromo-2,2-dimethylacetyl)phenoxyacetate, 11.3 g, as a white crystalline solid: m.p. 46°-50° C.; NMR (d6DMSO) δ 8.09 (2H, d), 7.05 (2H, d), 4.92 (2H, s), 3.72 (3H, s), 2.0(6H, s).

المصدر