13506-99-5Relevant articles and documents
Cobalt-catalyzed intermolecular hydroacylation of olefins through chelation-assisted imidoyl C-H activation
Yang, Junfeng,Seto, Yuan Wah,Yoshikai, Naohiko
, p. 3054 - 3057 (2015/05/20)
A low-valent cobalt catalyst generated from cobalt(II) bromide, a diphosphine ligand, and zinc powder promotes intermolecular hydroacylation of olefins using N-3-picolin-2-yl aldimines as aldehyde equivalents, which affords, upon acidic hydrolysis, ketone products in moderate to good yields with high linear selectivity. The reaction is applicable to styrenes, vinylsilanes, and aliphatic olefins as well as to various aryl and heteroaryl aldimines. The cobalt catalysis features a distinctively lower reaction temperature (60 °C) compared with those required for the same type of transformations catalyzed by rhodium complexes (typically 130-150°C).
One-pot catalytic C-C double bond cleavage of α,β-enones aided by alkyl group-immobilized silica spheres
Lee, Dong Hun,Jo, Eun-Ae,Park, Jung-Woo,Jun, Chul-Ho
experimental part, p. 160 - 163 (2010/03/04)
Catalytic C-C double bond cleavage of α,β-enones with a 1-alkene and H2O was carried out in the presence of a (Ph3P)3RhCl catalyst, 2-amino-3-picoline, cyclohexylamine, benzoic acid, and alkyl group-immobilized silica spheres. Upon completion of the reaction, the corresponding ketones were obtained without needing a further hydrolysis step. In this reaction, alkyl group-immobilized silica spheres act as a water reservoir for hydrolysis of an intermediate ketimine and as a phase divider between the organic solution and H2O.
Rh(I)-catalyzed O-silylation of alcohol with vinylsilane
Park, Jung-Woo,Chang, Hoon-Jo,Jun, Chul-Ho
, p. 771 - 775 (2007/10/03)
Silyl ethers can be produced from alcohols and vinylsilanes under a rhodium(I) catalyst. The reaction is believed to proceed through an O-H bond cleavage of alcohol by rhodium(I) complex and a subsequent hydride insertion into vinylsilane followed by β-silyl elimination of the resulting β-silylethyl rhodium(III) complex. Georg Thieme Verlag Stuttgart.