Heteroannulation through copper catalysis: a novel cyclization leading to a highly regio- and stereoselective synthesis of 2-substituted benzothiazolines |
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| Authors: | Nandi Kundu |
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| Affiliation: | Department of Organic Chemistry, Indian Association for the Cultivation of Science, Calcutta. |
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| Abstract: | [reaction: see text] 3-(2-Aminophenylthio)prop-1-yne 8 reacted with aryl iodides 9-18 under palladium-copper catalysis leading to the disubstituted alkynes 19-28 which after tosylation underwent a novel cyclization under copper catalysis to 2-substituted benzothiazolines 29-38. The expected 3-(arylidine)-2,3-dihydrobenzothiazines were not obtained. |
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