106596-69-4Relevant articles and documents
Enantioselective borohydride reduction catalyzed by optically active cobalt complexes
Yamada, Tohru,Nagata, Takushi,Sugi, Kiyoaki D.,Yorozu, Kiyotaka,Ikeno, Taketo,Ohtsuka, Yuhki,Miyazaki, Daichi,Mukaiyama, Teruaki
, p. 4485 - 4509 (2007/10/03)
The highly enantioselective borohydride reduction of aromatic ketones or imines to the corresponding alcohols was developed in the presence of a catalytic amount of an optically active cobalt(II) complex catalyst. This enantioselective reduction is carried out using a precisely premodified borohydride with alcohols such as tetrahydrofurfuryl alcohol, ethanol and methanol. High optical yields are obtained by choosing the appropriate alcohol as modifiers and a suitable β-ketoiminato ligand of the catalyst. The enantioselective borohydride reduction has been successfully applied to the preparation of optically active 1,3-diols, the stereoselective reduction of diacylferrocenes, and dynamic and/or kinetic resolution of 1,3-dicarbonyl compounds.
Chemistry of ketone α,β-dianions. Acylation reactions of dianion cuprates by acid chlorides
Ryu, Ilhyong,Ikebe, Masanobu,Sonoda, Noboru,Yamato, Shin-Ya,Yamamura, Go-Hei,Komatsu, Mitsuo
, p. 1257 - 1259 (2007/10/03)
The cross-coupling reaction of dianion cuprates, generated from ketone α,β-dianions and copper salts, with acid chlorides, was studied. The reaction gave good to moderate yields of unsymmetrical 1,4-diketones. The consecutive treatment of a dianion cuprate with cyclohexanecarbonyl chloride and methyl iodide or two different acid chlorides gave 2-methyl-substituted 1,4-diketone or triketone, respectively.
Clemmensen Reduction. X. The Synthesis and Acidolysis of Some Aryl Alkyl Substituted Cyclopropane-1,2-diols
Davis, Brian R.,Hinds, Mark G.,Ting, Philip P. C.
, p. 865 - 875 (2007/10/02)
The synthesis of a number of 1-alkyl-2-arylcyclopropane-1,2-diols is reported.Reductive treatment of suitably substituted 1,3-diketones gave a cyclopropanediyl diacetate from which the diol was obtained.Reaction of these diols with acid gave α-hydroxy ketones, in which an alkyl group, rather than an aryl group, was adjacent to the carbonyl function.Clemmensen reduction of the 1,3-diketones gave products of rearrangement, generally similar to those obtained by acidolysis of the cyclopropane-1,2-diols.The relationship of these results to thermochemical studies on the stability of carboxonium ions is discussed.
Preparation and reactions of an alkylzinc enolate
Hansen, Marvin M.,Bartlett, Paul A.,Heathcock, Clayton H.
, p. 2069 - 2074 (2008/10/08)
The preparation, characterization, and reactivity of ethylzinc enolate 3 are reported. Enolate 3 is less reactive than the corresponding lithium enolate but undergoes many of the same reactions. The unprecedented protonation of 3 by secondary amines is reported. The metal exchange reaction used to prepare 3 is not a general method for the preparation of other alkylzinc enolates.