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An efficient AgOTf-catalyzed (TfO = trifluoromethanesulfonate) cyclopropyl carbinol rearrangement for the synthesis of benzo[ b]oxepines and 2 H-chromenes is reported by starting from 2-[cyclopropyl(hydroxy)methyl]phenols. The reactions proved to be general in scope and furnished a range of the corresponding functionalized oxygen heterocycles. The formation of the benzo-fused six-membered adduct is proposed to result from the ring-contraction of the benzo[ b]oxepine derivative. Control of the product selectivity is achievable by fine-tuning the reaction time. The catalytic synergy between the silver(I) cation and the triflate anion was essential for optimal product yields. [ABSTRACT FROM AUTHOR]

Abstract: An efficient synthetic method to prepare highly substituted indenes in moderate to excellent yields that relies on Brønsted acid catalyzed Friedel–Crafts reaction of homoallylic alcohols under mild conditions is described. [Copyright &y& Elsevier]

A synthetic method to prepare o-phenolic estersefficiently by gold(I)-catalyzed benzannulation of 5-hydroxy-3-oxoalk-6-ynoateesters under mild conditions that did not require the exclusion ofair or moisture is described. [ABSTRACT FROM AUTHOR]

A wide range of functionalized oxygen heterocycles are obtained by a general method starting from 2-[cyclopropyl(hydroxy)methyl]phenols. [ABSTRACT FROM AUTHOR]

An advantage of the reported method consists in the mild reaction conditions which do not require the exclusion of air or moisture. [ABSTRACT FROM AUTHOR]

The article presents chemical equations related to the synthesis of domino aminocyclization/1,3-sulfonyl migration of N-substituted N-sulfonyl-aminobut-3-yn-2-ols to 1-substituted 3-sulfonyl-1H-pyrroles catalyzed by gold catalyst published in the "Journal of Organic Chemistry" in 2013.