Synthesis and Reactions of a Stable <i>o</i>-Quinoid 10-π-Electron System, Furo[3,4-<i>c</i>]pyridine
作者:Tarun K. Sarkar、Sunil K. Ghosh、Tahsin J. Chow
DOI:10.1021/jo991886w
日期:2000.5.1
4-c]pyridine-1-carboxylate (6), an intermediate in the Hamaguchi-Ibata reaction involving the Rh(II)-catalyzed intramolecularreaction of a diazo group with the carbonyl of an adjacent amido group, has been isolated and characterized. PM3 calculations reveal the heat of formation (DeltaH(f)) of this remarkably stable molecule to be -77.7 kcal/mol. Compound 6 undergoes a facile Diels-Alder cycloaddition with a variety