Aromatic nucleophilic substitution. Part 3. Preparation of novel 9-oxo-9H-thioxanthene- and 9-oxo-9H-xanthenedicarboximides and -dicarboxylates
作者:Walter Fischer
DOI:10.1002/hlca.19910740521
日期:1991.8.7
By aromatic nucleophilic substitution followed by intramolecular acylation, 9-oxo-9H-thioxanthene- and 9-oxo-9H-xanthene-dicarboximides were prepared from nitro- or chlorophthalimides and the dianions of thiosalicylic and salicylic acids (Scheme). The 9-oxo-9H-thioxanthene-3,4-dicarboximides were converted to 9-oxo-9H-thioxanthene-3,4-dicarboxylic-acid derivatives such as anhydride, esters, and further
通过芳香亲核取代,接着通过分子内酰化,9-氧代-9- ħ -thioxanthene-和9-氧代-9- ħ呫吨二甲酰亚胺从硝基或chlorophthalimides和硫代水杨酸和水杨酸的二价阴离子(其制备方案)。将9-氧代-9 H-硫代氧杂蒽-3,4-二甲酰亚胺转化为9-氧代-9 H-硫代氧杂蒽-3,4-二羧酸衍生物,例如酸酐,酯和其他酰亚胺。这些衍生物中的一些被证明是具有特殊性质的优异光敏剂,例如液体聚集形式,H 2 O溶解度,在亲脂性有机溶剂和聚合物中的溶解度或吸收波长的红移。