Intramolecular hydrogen bonding-assisted cyclocondensation of α-diazoketones with various amines: a strategy for highly efficient Wolff 1,2,3-triazole synthesis
Intramolecular hydrogen bonding-assisted cyclocondensation of α-diazoketones with various amines: a strategy for highly efficient Wolff 1,2,3-triazole synthesis
Straightforward synthetic access to α-acyloxy-1,3-dicarbonyl compounds is described via a novel Cu(ii)-catalyzed and isocyanide-assisted formal O–H insertion reaction of α-diazocarbonyl compounds to carboxylic acids.
A novel Cu(II)-catalyzed cyclization of alpha-diazo-beta-oxoamides with amines has been developed, constituting a straightforward method to construct pyrrol-3(2H)-one rings. The intramolecular hydrogen bonding effect in alpha-diazo-beta-oxoamides plays an essential role in this reaction. A plausible reaction mechanism involving divergent generation and subsequent [2 + 3] cyclization of ketene and alpha-diazoimine