Citation: Wen Tao GAO, Shu Fen ZHANG, Jin Zong YANG. Oxidative Cyclization of Azo-coupling Products of 3-Isopropenyltropolone and 3-Cinnamoyltropolone with Bromine[J]. Chinese Chemical Letters, ;1999, 10(1): 1-4.
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A new method to synthesize heterocycle-fused troponoid compounds by oxidizing azocoupling products of 3-isopropenyltropolone and 3-cinnamoyItropolone with bromine in the presence of pyridine was reported for the first time. Reaction of azo-couping products of 3-isopropenyl tropolone la~f and 3-cinnamoyltropoIone 3a-d with excess bromine afforded heterocycle-fused troponoid compounds 2a-f, 4a-d, respectively.
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Keywords:
- 3-isopropenyltropolone,
- 3-cinnamoyltropolone,
- oxidation,
- cyclization,
- bromine
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