ON THE POSITIONAL REACTIVITY ORDER IN THE SULFONATION OF BIPHENYL AND A SERIES OF OXY DERIVATIVES
Zou, Y. S.
Bakker, B. H.
- 材料学院－已发表论文 
The sulfonation of biphenyl (1) and its 2- and 4-methoxy, 3,3'- and 4,4'-dimethoxy, and 4,4'-dimesyloxy derivatives with sulfur trioxide in dichloromethane as solvent at 22 degrees C has been studied. Sulfonation of biphenyl leads to the subsequent formation of the 4-sulfonic acid (4-S), 4,4'-S-2, 2,4,4'-S-3 and traces of 2,4,2',4'-S-4. The sulfonation of the oxy substituted biphenyls also occurs successively in the one phenyl and then in the other. In case of the asymmetrical 2- and 4-methoxybiphenyl the substitution starts in the anisyl moiety.