ChemInform Abstract: Polymer‐Supported Dicyanoketene Acetal as a π‐Acid Catalyst: Monothioacetalization and Carbon—Carbon Bond Formation of Acetalssubstitution reactionsaldehyde derivatives (acyclic compounds)ketone derivatives (acyclic compounds)
ethylene acetals, and THP ethers of alcohols, an aldehyde, and ketones, and silyl ethers of primary and secondary alcohols were investigated using dicyanoketene acetals (DCKA) and a polymer-supported DCKA as a pi -acid promoter in aqueous acetonitrile and a single aqueous medium. In all ...
polymeric dicyanoketene acetalpolymer effectcatalysis in aqueous mediadeacetalizationdesilylationDeprotecting reactions of acetals including acetonides, ethylene acetals, and THP ethers of alcohols, an aldehyde, and ketones, and silyl ethers of primary and secondary alcohols were investigated using dicyano...
We reported that dicyanoketene acetals (DCKA), in which gem-dicyano groups of tetracyanoethylene (TCNE) are displaced with alkoxyl groups, function as pi-acid catalysts, and that a polymer (poly-DCKA-1) derived by copolymerization of a monomer, in which the alkoxyl group at the omega-...
Mannich-type reaction of aldimines and enolsilyl ethers proceeded with excellent aldimine-selectivity in the coexistence of aldehydes by means of dicyanoketene ethylene actetal (DCKEA) and the related polymer-supported dicyanoketene acetal as a recyclable pi-acid catalyst. [References: 11]...
A novel polymer was synthesized by copolymerization of styrene monomer bearing dicyanoketene acetal functionality and ethylene glycol dimethacrylate, and used successfully as a recyclable 蟺-acid catalyst in monothioacetalization of aromatic, aliphatic, acyclic, and cyclic acetals with thiophenol and ...
polymerMannich-type reactionaqueous reactionrecyclingWe reported that dicyanoketene acetals (DCKA), in which gem-dicyano groups of tetracyanoethylene (TCNE) are displaced with alkoxyl groups, function as pi-acid catalysts, and that a polymer (poly-DCKA-1) derived by copolymerization of a monomer...
Mannich-type reaction of aldimines and enolsilyl ethers proceeded with excellent aldimine-selectivity in the coexistence of aldehydes by means of dicyanoketene ethylene acetal (DCKEA) and the related polymer-supported dicyanoketene acetal as a recyclable π-acid catalyst.doi:10.1002/chin.200025099...