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Reaction of 3/2-Formylindoles with TOSMIC: Formation of Indolyloxazoles and Stable Indolyl Primary Enamines.

✍ Scribed by Manas Chakrabarty; Ramkrishna Basak; Yoshihiro Harigaya; Hiroaki Takayanagi


Publisher
John Wiley and Sons
Year
2005
Weight
31 KB
Volume
36
Category
Article
ISSN
0931-7597

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Easy access to medium rings by entropy/s
✍ James G. Walsh; Declan G. Gilheany πŸ“‚ Article πŸ“… 2002 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 48 KB

## Abstract The reaction of Z,Z‐2,3,4,5‐tetrahalo‐2,4‐dien‐1,6‐dibromides (**3**, R^1^ ‐ R^4^ = Cl, Br) with primary amines in the presence of potassium carbonate leads to both the dihydroazepines **4** and secondary enamines **5**. The formation of enamine is suppressed with toluene sulfonamide as