An Improved Synthesis of CarbazolesviaDomino Reaction ofN-Protected-2-methylindoles with DMF-DMA/DMA-DMA
摘要:
An efficient synthesis of carbazole analogs has been achieved via interaction of N‐protected‐2‐methylindoles with N,N‐dimethylformamide dimethylacetal as well as N,N‐dimethylacetamide dimethylacetal in the presence of pyrrolidine or 1,4‐diazabicyclo(2.2.2)octane (DABCO).
Synthesis of substituted carbazoles via electrocyclization of in situ generated enamines from 1-phenylsulfonyl-2/(3)-methyl-3/(2)-vinylindoles and DMF·DMA/DMA·DMA
作者:Radhakrishnan Sureshbabu、Ramalingam Balamurugan、Arasambattu K. Mohanakrishnan
DOI:10.1016/j.tet.2009.03.010
日期:2009.5
Interaction of 2/(3)-methyl-3/(2)-vinylindoles and DMF center dot DMA/DMA center dot DMA at 110 degrees C led to the in situ generation of enamines, which on concurrent electrocyclization followed by subsequent aromatization afforded substituted carbazoles. (C) 2009 Elsevier Ltd. All rights reserved.