反应详情

A mixture of dibromohydantoin (70 g, 0.24 mol) and AIBN (5 g) was added in portions, at 150° C., to 2,6-dichloro-3-nitrotoluene (100 g, 0.48 mol) in chlorobenzene (400 ml). A mixture of dibromohydantoin (35 g, 0.12 mol) and AIBN (2.5 g) was added once again after 1 h. After a further 1.5 h, the mixture was allowed to cool down and ethyl acetate (500 ml) was added. This mixture was washed once, in each case, with saturated Na2SO3, Na2CO3 and NaCl solution, dried (MgSO4) and concentrated, when the title compound resulted as an amorphous powder. ##EQU1## b) 4-(2,6-Dichloro-3-nitrobenzyloxy)benzothiazole

1. additionwas added once again after 1 h
2. temperatureto cool down
3. washThis mixture was washed once, in each case, with saturated Na2SO3, Na2CO3 and NaCl solution
4. dry with materialdried (MgSO4)
5. concentrationconcentrated