Synthetic Communications p. 16 - 25 (2013)
Update date:2022-08-03
Topics:
Tyagi, Ruchi
Kaur, Navjeet
Singh, Bhawani
Kishore
Application of a very mild protocol to the Beckmann rearrangement of ketoximes of pyrazolo annulated oxocarbazole 5a and oxoazacarbazole 5b with the organocatalyst derived from 2,4,6-trichloro[1,3,5]triazine (TCT) and dimethylformamide (DMF) has been explored to provide a regioselective formation of the corresponding azepine 6a and 1,4-diazepine 6b respectively in good yield and purity. The mechanistic precedence for the exclusive formation of only one regioisomer has been discussed. Copyright Taylor & Francis Group, LLC.
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