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This article describes a copper‐catalyzed aza‐Henry reaction. Copper complexes of camphor‐derived aminopyridines catalyze the addition of nitromethane to N‐(2‐pyridyl)sulfonyl aldimines to give the corresponding β‐nitrosulfonamides with good yields and variable enantiomeric excesses (up to 83%). An example of transformation of these compounds into N‐(2‐pyridyl)sulfonyl‐α‐amino acids and deprotection...
The enantioselective Henry reaction between alkyl‐ and arylglyoxal hydrates and nitromethane catalyzed by CuII–iminopyridine complexes takes place regioselectively on the ketone carbonyl group to give chiral tertiary nitroaldols with high functional group density and enantiomeric excesses of up to 96 %. Both aromatic and aliphatic glyoxals are suitable substrates for this reaction.
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