与2,4-二苯基-5,6,7,8-四氢氧化铬三氟甲烷磺酸酯的芳香胺(5)得到相应的吡啶鎓盐(6; R =芳基),然后通过碱将其转化为脱水碱(7)。苯甲酰氯将(7)转化为新的吡啶鎓脱水碱(9)。这些无水碱(9)在150℃下重排成异构的酚烯醇醚(10),它们易于水解得到相应的酚。评估结果的机理和综合意义。
Thermal rearrangement of pyridinium anhydrobases: migration of N-substituents to methine carbon
作者:Alan R. Katritzky、Radi Awartani
DOI:10.1016/0040-4020(82)85086-2
日期:1982.1
N-Benzyl and N-methyl groups migrate to the methinecarbon atom on thermolysis of pyridiniumanhydrobases. Cross-over experiments indicate an intermolecular reaction, probably involving homolysis.