A highly efficient, chemo-, and regioselective approach has been developed for the switchable synthesis of tetrasubstituted alkenyl sulfones and naphthyl sulfones from homopropargylic alcohols via sulfonylation/1,4-aryl migration and sulfonylation/cyclization. The present switchable processes are characterized by mild and metal-free conditions, high selectivities, good functionalgroup tolerance, the
A remote activation and metal-free transformation from alkynes to carbonyl compounds is developed. Just in the solvent of HOAc and EtOH, this reaction artfully converts alkynes to valuable ketones by...
Synthesis of Polysubstituted Furans through Electrochemical Selenocyclization of Homopropargylic Alcohols
作者:Debabrata Maiti、Atreyee Halder、Aswathy Sasidharan Pillai、Suman De Sarkar
DOI:10.1021/acs.joc.1c01688
日期:2021.11.19
The current method represents an electrochemically driven synthetic route to access polysubstituted selenofuran derivatives through the diselenide-promoted cyclization of homopropargyl alcohols. The tandem electro-oxidative transformation operates at ambient temperature and in the absence of an external oxidant. This mild and efficient methodology exhibits good functional group compatibility, providing
Electro-oxidative Synthesis of Unsymmetrical Alkyne-1,4-diones via Sequential Ring Formation and Cleavage
作者:Atreyee Halder、Debabrata Maiti、Jhilik Dutta、Suman De Sarkar
DOI:10.1021/acs.orglett.3c03045
日期:2023.10.20
Synthesis of unsymmetrical but-2-yne-1,4-diones is reported through oxidative alkyne translocation of readily accessible homopropargylic alcohols. The developed method consists of an unprecedented one-pot sequential electro-oxidative annulation–fragmentation–chemical selenoxide elimination process. Excellent functional group compatibility was observed, and an array of yne-1,4-diones were synthesized