2009
DOI: 10.1002/chin.200951039
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ChemInform Abstract: Solvent‐Free Friedel—Crafts Cyclization with Trichloroacetic Anhydride.

Abstract: Ring closure reactions O 0130Solvent-Free Friedel-Crafts Cyclization with Trichloroacetic Anhydride. -The scope of the title reaction is explored with the synthesis of tetralones (II), benzothiopyrans (IV), benzoxepins and benzothiepines (VIII) as well as dibenzoxepins and dibenzothiepins (VI). Phenoxy-or phenylthiopropanoic acids do not react to the corresponding benzofuran or benzothiophene derivatives and the formation of eight-membered heterocycles such as (VIIIc) also fails. -(ANDREWS, B.; BULLOCK, K.; CO… Show more

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