Acid catalysis of the Claisen rearrangement. 2. Formation of the benzofurobenzopyran and benzofuro[3,2-b]benzofuran skeletons from 1,4-bis(aryloxy)-2-butynes

A novel photochemical ring contraction of 11a-methylpterocarpans

The synthesis of complex cyclic compounds is extremely challenging for organic chemists. Many transition-metal-salt-mediated cyclizations are reported in literature. Hg(II) salts have been successfully employed in cyclizations to form complex heterocyclic and carbocyclic structures that are impossible to synthesize with other transition metal salts. In this review, we have summarized cyclization reactions that are performed with Hg(II) salts. These salts are also successfully applied in stoichiometric or catalytic amounts to form complex cyclic structures and natural products.

https://www.beilstein-journals.org/bjoc/content/pdf/1860-5397-17-153.pdf

Acid catalysis of the Claisen rearrangement. 2. Formation of the benzofurobenzopyran and benzofuro[3,2-b]benzofuran skeletons from 1,4-bis(aryloxy)-2-butynes

Citations

A novel photochemical ring contraction of 11a-methylpterocarpans

Advances in mercury(II)-salt-mediated cyclization reactions of unsaturated bonds.

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