Journal
ORGANIC LETTERS
Volume 25, Issue 16, Pages 2793-2797Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.3c00691
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A unique, facile, and straightforward electrochemical oxidative annulation of inactivated propargyl aryl ethers with sulfonyl hydrazides leading to 3-sulfonated 2H-chromenes has been achieved. This green protocol works under mild reaction conditions using a constant current in an undivided cell and is devoid of oxidants and catalysts. The process exhibited a broad scope and functional group tolerance, providing an alternative and sustainable strategy for conventional chromene synthesis.
A unique, facile, and straightforward electrochemical oxidative annulation of inactivated propargyl aryl ethers with sulfonyl hydrazides leading to 3-sulfonated 2H-chromenes has been achieved. Significantly, this protocol involves a green approach that works under mild reaction conditions using a constant current in an undivided cell and is devoid of oxidants and catalysts. Notably, the process exhibited a broad scope and functional group tolerance to deliver 2H-chromenes and would represent an alternative and sustainable strategy versus conventional chromene synthesis.
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