Diels-Alder cycloadditions of 2(1H)-quinolones having an electron-withdrawing group at the 3-position acting as dienophiles with dienes
- PMID: 11456098
- DOI: 10.1248/cpb.49.893
Diels-Alder cycloadditions of 2(1H)-quinolones having an electron-withdrawing group at the 3-position acting as dienophiles with dienes
Abstract
Diels-Alder cycloadditions of 2(1H)-quinolones having an electron-withdrawing group at the 3-position with alkyl- and silyloxy-1,3-butadienes (2a,b) were carried out to give phenanthridones richly functionalized regio- or stereoselectively under conditions of atmospheric and high pressure. Furthermore, regioselectivity and chemoselectivity of 3-substituted 2(1H)-quinolones to 2a, b were examined using MO calculation.
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