Intramolecular diels-alder reactions of pyrazines with alkynylphenyl moieties as side-chain dienophiles
作者:Norbert Haider、Henk C. van der Plas
DOI:10.1016/s0040-4020(01)81533-7
日期:1990.1
IntramolecularDiels-Alderreactions of (2-alkynylphenyl-X)-pyrazines (X = O, NAc, S) under neutral and acidic conditions are described. The isomer distribution of the resulting tricyclic b- and c-annelated pyridines is discussed.