TEMPO promoted direct multi-functionalization of terminal alkynes with 2-oxindoles/benzofuran-2(3H)-one.

Org Biomol Chem

Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Published: July 2018

Highly selective and catalyst-free tandem multi-functionalization of terminal alkynes was developed with 2-oxindoles and benzo-furan-2(3H)-one using TEMPO both as a radical promoter and a trapping reagent. This work expands the scope of the radical-cascade addition/trapping process of alkynes for the effective construction of various β-oxyl carbonyls in moderate to good yields.

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Source
http://dx.doi.org/10.1039/c8ob01380bDOI Listing

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