Diels-Alder reactions of 1-dimethylamino-1-aza-1,3-dienes with benzo[<i>b</i>]thiophene-4,7-quinones
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Date
2003
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Abstract
The cycloaddition reactions of 1-dimethylamino-1-azabuta-1,3-dienes with benzo[b]thiophene-4,7-quinones substituted at 2- and 2,3-positions have been investigated. The reactions afforded thienoquinolinequinones or mixture of regioisomeric thienoquinolinequinones depending upon the substituents of the partners. The regiochemistry of the cycloadditions are in accord with the HOMOdiene/LUMOdienophile interactions.