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。
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。
KATRITZKY, A. R.;LANGTHORNE, R. T.;MUATHIN, H. A.;PATEL, R. C., J. CHEM. SOC. PERKIN TRANS., 1983, N 11, 2601-2604
作者:KATRITZKY, A. R.、LANGTHORNE, R. T.、MUATHIN, H. A.、PATEL, R. C.
DOI:——
日期:——
Nucleophilic displacements of N-aryl and heteroaryl groups. Part 1. Pyrylium-mediated transformation of anilines into phenols
作者:Alan R. Katritzky、Roland T. Langthorne、Hussni A. Muathin、Ranjan C. Patel
DOI:10.1039/p19830002601
日期:——
4-diphenyl-5,6,7,8-tetrahydrochromenylium trifluoromethanesulphonate (5) gave the corresponding pyridinium salts (6;R = aryl) which were converted by base into the anhydrobases (7). Benzoyl chloride converted (7) into the new pyridinium anhydrobases (9). These anhydrobases (9) rearranged at 150 °C into the isomeric phenol enol ethers (10) which were readily hydrolysed to yield the corresponding phenols
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。