Ring transformations of heterocyclic compounds.<b>XXV</b>. Phenanthrene aldehyde imines via ring transformation of pyrylium salts with methylenedihydroisoquinolines-A novel access to the phenanthrene skeleton
作者:Thomas Zimmermann、Harald Krautscheid
DOI:10.1002/jhet.5570440509
日期:2007.9
phenanthrene-9-carbaldehyde imines 4 are obtained, the structure of which was confirmed by an X-ray structure determination of the 1-(4-methylphenyl) substituted derivative. Acid catalyzed hydrolysis of the imines 4 gives rise to the parent phenanthrene aldehydes. The transformation 1 + 2(6) → 4 represents a novel access to the phenanthrene skeleton.
据报道,在碱的存在下,由相关的2-甲基异喹啉鎓盐2原位产生的2,4,6-三芳基吡啶盐1与2-亚甲基二氢异喹啉6的环转化。甲醇中的1(2)(6)和甲醇钠的转化可生成2-(2,4,6-三芳基苯基)异喹啉鎓盐,乙醇中的乙醇钠可得到芳基取代的菲-9-甲醛亚胺4,通过1-(4-甲基苯基)取代的衍生物的X射线结构测定来确认其结构。酸催化的亚胺4水解生成母体菲醛。转换1 + 2(6)→ 4表示对菲骨架的新颖访问。