Tetrahedron p. 3117 - 3134 (1996)
Update date:2022-07-30
Topics:
White, Lindsay A.
Storr, Richard C.
3-Methoxycarbonyl-4-keto-2,5-dihydrothiophene is a convenient starting point for synthesis of a range of 3,4- and 2,3-quinoline and quinolone and coumarin fused dihydrothiophene dioxides. With the exception of the 2,3-quinoline derivatives these all lose sulfur dioxide on thermolysis to give the corresponding o-quinodimethanes which can be intercepted in Diels-Alder reactions.
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