Fluorination of benzofuran and of N-acylindoles with trifluorofluorooxymethane
Abstract
The reactions of certain heteroaromatic substrates with trifluorofluorooxymethane gave CF3O(F) and F(F) adducts. Subsequent reactions with base regenerated the heteroaromatic system substituted by fluoro or trifluoromethoxy Under these conditions methyl 1-acetylindol-3-ylacetate gave 1-acetyl-2-hydroxy-3-methoxycarbonylmethylene-indoline.