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Updated: Jun 14, 2026

Efficient Synthesis of Polyfunctionalized Benzenes in Water via Persulfate-promoted Benzannulation of α,β-Unsaturated Compounds and Alkynes
Published on: December 16, 2019
Gold-catalyzed benzannulation of 3-alkoxy-1,5-enynes: access to functionalized benzenes
1State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People's Republic of China.
Abstract:
A cationic Au(I) complex catalyzed benzannulation of 3-alkoxy-1,5-enynes bridged by a cyclopropyl ring with a variety of nucleophiles is described. The reaction occurs selectively through a 6-endo-dig pathway to provide tri- and tetrasubstituted benzenes efficiently under mild reaction conditions.
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Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.

