The -NH-(C=)-Br Functionality of Heteroaromatic Compounds as a Synthon for Fused Dihydrooxazoles

[摘要]：Fused dihydrooxazoles are produced by the reaction of 8-bromoteophylline (1), 6-bromo-2-pyridone (7), or 2-bromobenzimidazole (11) with an N-substituted N-(2,3-epoxypropyl)amine. The product derived from 1 undergoes rearrangement to a fused dihydrooxazine while the fused dihydrooxazoles derived from 7 and 11 are stable.

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