KATRITZKY A. R.; CUTLER A. T.; DENNIS N.; SABONGI G. J.; RAHIMI-RASTGOO S+, J- CHEM. SOC. PERKIN TRANS., PART 1, 1980, NO 5, 1176-1184
作者:KATRITZKY A. R.、 CUTLER A. T.、 DENNIS N.、 SABONGI G. J.、 RAHIMI-RASTGOO S+
DOI:——
日期:——
1,3-Dipolar character of six-membered aromatic rings. Part 52. 2π+ 8π Cycloaddition reactions of 1-substituted 3-oxidopyridinium betaines
作者:Alan R. Katritzky、Alan T. Cutler、Nicholas Dennis、Gebran J. Sabongi、Soheila Rahimi-Rastgoo、Gerhard W. Fischer、Ian J. Fletcher
DOI:10.1039/p19800001176
日期:——
Dichloroketen and a series of aryl(bromo)ketens react with various 1-substituted 3-oxidopyridiniums to give novel bicyclic compounds by addition across the C(4)–O and the C(2)–O positions. Frontier-MO theory is used to rationalise the orientation of these cycloadditions. Acid-catalysed hydrolysis of the C(2)–O adducts (9) yielded 3-hydroxy-2-benzylpyridines.