Add time:08/28/2019         Source:sciencedirect.com

A variety of 2-hydroxybenzophenones on reaction with Corey–Chaykovsky reagent underwent unprecedented rearrangements leading to 3-substituted benzofurans 8 and one-carbon homologated compounds 9 and 12. Compounds 9 could further be quantitatively transformed to 2-substituted benzofuran derivatives 10.

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