Electrogenerated Acid-Catalyzed Reactions of Acetals, Aldehydes, and Ketones with Organosilicon Compounds, Leading to Aldol Reactions, Allylations, Cyanations, and Hydride Additions
electrogenerated acid (EG acid) in the silicon-mediated acid-catalyzed reactions; e.g., aldol reactions, allylations, cyanations, and hydride additions is described. The aldol reaction of acetals 1 with enol trimethylsilyl ethers 3 and 1,2-bis(trimethylsiloxy)alkenes 4 gives the corresponding adducts 5 and 6, respectively. The reaction proceeds smoothly with EG acid derived from perchlorate salts such
ELECTROGENERATED ACID AS AN EFFICIENT CATALYST FOR CYANATION OF ACETALS WITH TRIMETHYLSILYL CYANIDE
作者:Sigeru Torii、Tsutomu Inokuchi、Tohru Kobayashi
DOI:10.1246/cl.1984.897
日期:1984.6.5
A facile cyanation of acetals with trimethylsilyl cyanide, giving the corresponding α-alkoxyalkanenitriles, is achieved by using an electrogenerated acid as an acid-catalyst.
Polymer-Supported Dicyanoketene Acetal as a .PI.-Acid Catalyst. Monothioacetalization and Carbon-Carbon Bond Formation of Acetals.
作者:Nobuyuki TANAKA、Tsuyoshi MIURA、Yukio MASAKI
DOI:10.1248/cpb.48.1010
日期:——
Polymeric dicyanoketeneacetals (DCKA) were synthesized by copolymerization of styrene and divinylbenzene or ethylene glycol dimethacrylate. These novel polymers could be used successfully as recyclable pi-acid catalysts in monothioacetalization or carbon-carbon bond forming reaction of acetals.