Journal
TETRAHEDRON
Volume 69, Issue 38, Pages 8169-8173Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2013.07.043
Keywords
Baylis-Hilman adduct acetates; Tandem reaction; Indoline-2-thione; Indole
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Funding
- Research Council of Sharif University of Technology
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Indoline-2-thiones (5) were applied as 1,3-dinucleophiles in a tandem reaction with Baylis-Hillman adduct acetates (4) to give novel tetrahydrothiopyrano[2,3-b]indole skeletons (6). The effect of different solvents, bases, and catalysts on the yields and stereochemical outcome was studied in detail. The results indicated that acetonitrile as solvent and K2CO3 as base, under reflux conditions, were the optimum conditions. Products 6a-6l were obtained in high diastereoselectivity and yield (up to 94%). (C) 2013 Elsevier Ltd. All rights reserved.
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