Tetrahedron Letters p. 6639 - 6642 (1993)
Update date:2022-08-31
Topics:
Tome
Cavaleiro
Storr
Pyrimidine fused dihydrothiophene S,S-dioxides 7 undergo thermal elimination of sulfur dioxide to give the pyrimidine o-quinodimethanes 8 which can be intercepted in Diels-Alder reactions to give substituted 5,6,7,8-tetrahydroquinazolines; these form cyclooctapyrimidines on heating with more dienophile.
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