作者:L. Yu. Ukhin、E. N. Shepelenko、L. V. Belousova、Zh. I. Orlova、G. S. Borodkin、K. Yu. Suponitsky
DOI:10.1007/s11172-011-0057-3
日期:2011.2
New aminophthalides were synthesized from o-formylbenzoic acid and substituted 2-aminothiophenes. Two of these compounds underwent recyclization in boiling Ac2O to give the previously unknown 3-acetoxy-2-(3-cyano-4,5-dimethylthiophen-2-yl)-1,3-dihydroisoindol-1-one and 3-acetoxy-2-(3-cyano-4,5-tetramethylenethiophen-2-yl)-1,3-dihydroisoindol-1-one. The possible reaction mechanism and factors preventing the recyclization, in particular, the formation of intramolecular hydrogen bonds in the starting phthalides, were discussed. Some reactions of the resulting compounds with C-nucleophiles in trifluoroacetic acid were investigated. Two derivatives containing 4-hydroxy-3,5-di-tert-butylphenyl substituents were studied by X-ray diffraction.
新型氨基酞类化合物由邻甲酰基苯甲酸和取代的2-氨基噻吩合成获得。其中两种化合物在沸腾的醋酸酐中发生环化反应,生成先前未知的3-乙酰氧基-2-(3-氰基-4,5-二甲基噻吩-2-基)-1,3-二氢异吲哚-1-酮和3-乙酰氧基-2-(3-氰基-4,5-四亚甲基噻吩-2-基)-1,3-二氢异吲哚-1-酮。讨论了可能的反应机理及阻止环化的因素,特别是起始酞类化合物中分子内氢键的形成。研究了所得化合物与三氟乙酸中的C-亲核试剂的一些反应。通过X射线衍射研究了两种含有4-羟基-3,5-二叔丁基苯基取代基的衍生物。