2,3,4,6‐Tetrahydro‐1,6‐dithia[3‐a]azaphenalene (THDTAP) is a heteropolycycle possessing two active sites for acylation. The regioselective acylation of THDTAP was conducted at the para and meta positions with respect to the nitrogen atom, resulting in a series of para‐ and meta‐substituted benzophenones having a donor–acceptor‐type structure. The benzophenone derivatives are distinct in chemical reactivity and photophysical properties. para‐Substituted benzophenones show reversible OFF/ON fluorescence upon acidification and neutralization. More information can be found in the Full Paper by Xiangfeng Shao et al. on page 579 in Issue 3, 2018 (DOI: 10.1002/ajoc.201700624).

中文翻译：

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掩盖特征：2,3,4,6-四氢-1,6-二硫[3-a]氮杂苯二酚对供体-受体型二苯甲酮的区域选择性酰化作用（Asian J. Org。Chem。3/2018）

2,3,4,6-四氢-1,6-二硫杂[3- a ]氮杂萘（THDTAP）是具有两个酰化活性位点的杂多环。THDTAP的区域选​​择性酰化作用是在相对于氮原子的对位和间位进行的，产生了一系列具有供体-受体型结构的对位和间位取代的二苯甲酮。二苯甲酮衍生物在化学反应性和光物理性质上是不同的。对位取代的二苯甲酮在酸化和中和后显示可逆的OFF / ON荧光。可以在邵向峰等人的论文全文中找到更多信息。就在第3期，2018页579（：10.1002 / ajoc.201700624 DOI）。