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2004
Triazine derivatives
R 0655
Cyclocondensation Reaction of Heterocyclic Carbonyl Compounds. Part 10. The
of Competitive Cyclocondensation Between Carbonyl Groups of 6-Aza52- 141 Direction
uracile and 1,2-Dihydro-quinoxalin-2-one Cycles. — Intramolecular cyclocondensation of 2,6-disubstituted aniline (VII) occurs exclusively between the amino group
and the carbonyl group of the azauracil moiety to furnish compound (VIII) in excellent
yield. The theoretically possible regioisomeric reaction product (XI) is synthesized
unambiguously by condensation of isatine (IX) with o-phenylenediamine. —
(BUCHTIK, R.; HLAVAC*, J.; SLOUKA, J.; FRYCAK, P.; J. Heterocycl. Chem. 41
(2004) 4, 597-599; Dep. Org. Chem., Palacky Univ., CZ-771 46 Olomouc, Czech
Republic; Eng.) — H. Toeppel
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