The 2-hydroxy-cycloheptindolones 2a-c react with bis(dimethylamino)methane to yield the phenol Mannich bases 3a-c.The 1,3-benzoxazine derivatives 5a-c are synthesized from 2a,b,d and hexahydrotriethyl-1,3,5-triazine 4.Reaction of 6-hydroxyindole 6 with triazine 4 yields benzoxazine 7.
Kucklaender, Uwe,Toeberich, Hildegard
p. 737 - 740
(2007/10/02)
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