There are lots of approaches to assemble benzofuran rings. The most typical approaches are dehydration of phenoxyalkanone less than acidic condition,104 dehydration of o-hydroxybenzophenone below acidic issue,one hundred and five decarboxylation of o-acetylphenoxyacetic acid or ester less than alkaline issue,106 and cyclization of o-hydroxybenzophe… Read More