反应详情

To a 10° C. solution of 25 g (0.142 mol) of 7-methoxy-3,4-dihydro-1(2 H)-naphthalenone in 1 liter ether was added dropwise (maintaining reaction temperature at about 10° C.) 37.9 g (0.237 mol) of bromine. The reaction solution was concentrated on a rotating evaporator and the residue crystallized from ether to give 31.6 g (81%) of present title compound, m.p. 79-80° C.

1. concentrationThe reaction solution was concentrated on a rotating evaporator
2. customthe residue crystallized from ether