The photochemistry of para-substituted phenylsulphamates—photo-Fries rearrangements
作者:John M. Lally、William J. Spillane
DOI:10.1039/p29910000803
日期:——
XC6H4NHSO3Na [XH (1a), CH3(1b), F (1c), Cl (1d), Br (1e) and NO2(1f)] in degassed methanolic solutions has been examined. For 1a and 1b photo-Fries type rearrangements to sulphonic acids and photodegradation to anilines have been observed. The halogenosulphamates 1c–1e do not rearrange but degrade to anilines and are photosolvolysed to p-methoxyphenylsulphamic acid. No notable spectral changes took place during
一系列对位取代的苯磺酸盐,XC 6 H 4 NHSO 3 Na [X H(1a),CH 3(1b),F(1c),Cl(1d),Br(1e)和已检查了脱气甲醇溶液中的NO 2(1f)]。对于1a和1b,已经观察到光爆型重排成磺酸和被光降解成苯胺。卤代硫酸盐1c – 1e不会重新排列,但会降解为苯胺,并被光解为苯胺。对甲氧基苯基硫酸。在1f的辐射中,在相对较长的时间内没有发生明显的光谱变化。对1b的底物浓度研究,自由基清除,敏化和淬灭实验表明,如先前对1a的发现,其光解涉及分子内自由基机理,并涉及两个三重态。