Continuous Flow α‑Arylation of N,N‑Dialkylhydrazones under Visible-Light Photoredox Catalysis
Organic Letters(2017)
Abstract
The first direct α-arylation of aldehyde-derived N,N-dialkylhydrazones with electron deficient aryl and heteroaryl cyanides under visible-light photoredox catalysis has been developed. Structurally complex α,α′-diaryl-N,N-cycloalkylhydrazones were obtained in moderate yields by repetition of the direct arylation protocol. A continuous-flow procedure for the preparation of α-aryl-N,N-dialkylhydrazones on a multigram scale has also been established.
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visible-light
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