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Titanium Reagents for the Synthesis of 2-Substituted Benzo[ b ]thiophenes on the Solid Phase

✍ Scribed by Roberts, Christine F.; Hartley, Richard C.

Book ID: 118039506
Publisher: American Chemical Society
Year: 2004
Tongue: English
Weight: 316 KB
Volume: 69
Category: Article
ISSN: 0022-3263
DOI: 10.1021/jo049344o

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## Abstract A convenient and general approach to the synthesis of 2‐substituted 3‐bromobenzofurans and ‐benzothiophenes was developed. The procedure is based on the cyclization of __ortho__‐substituted arylalkynes in the presence of __N__‐methylpyrrolidin‐2‐one hydrotribromide (MPHT) as a soft and