Untersuchungen zur Synthese von Thiazolo2,3-c1,4benzoxazinen. 17. Mitteilung über Studien zur Chemie der 1,4-Oxazine

摘要

Reaction of C2 unsubstituted benzoxazine derivative2bwith α-bromo compounds only yields the substitution products4a,band7, whereas from the 2-benzoxazine carboxylate9bthe tricyclic heterocycle12is obtained