The Diels−Alder Reactions of Quinone Imine Ketals: A Versatile Synthesis of Highly Substituted 5-Methoxyindoles
作者:Scott C. Banfield、Dylan B. England、Michael A. Kerr
DOI:10.1021/ol016562k
日期:2001.10.1
[reaction: see text]. N-benzoylated quinone imine ketals undergo smooth cycloadditions in a [4 + 2] sense to yield the expected cycloadducts. The crude cycloadducts, when subjected to a short series of simple transformations, produce synthetically useful quantities of 5-methoxyindoles in excellent overall yields.