72930-73-5Relevant articles and documents
Reductive coupling of carbonyl compounds promoted by cobalt or titanium nanoparticles
Nador, Fabiana,Mascaro, Evangelina,Castro, Melisa,Vitale, Cristian,Radivoy, Gabriel
, p. 312 - 326 (2011/06/17)
The reaction of a series of aldehydes and ketones with readily prepared cobalt or titanium nanoparticles, under mild reaction conditions, led to the obtention of different reductive dimerization products depending on the nature of the transition metal used. Cobalt nanoparticles (CoNPs) allowed the selective transformation of the starting carbonyl compounds into vicinal diols, whereas the reaction promoted by titanium nanoparticles (TiNPs) led to the formation of the corresponding alkenes. In this last case, the use of trimethylsilyl chloride (TMSCl) as additive, at 0 °C, also allowed the obtention of vicinal diols after acidic aqueous work-up. ARKAT-USA, Inc.
Oxidative Cleavage of vic-Diols Using Copper(II) Bromide-Lithium t-Butoxide: A New Route to Unsymmetrical 1,5- and 1,6-Diketones
Fujiwara, Tooru,Tsuruta, Yumiko,Arizono, Ko-Ichi,Takeda, Takeshi
, p. 962 - 964 (2007/10/03)
Unsymmetrical 1,6-diketones were obtained by the copper(II) bromide-lithium t-butoxide oxidation of 1,2-disubstituted 1,2-cyclohexanediols. The diols were easily prepared by the addition of Grignard reagents to 2-trimethylsiloxy-2-cyelohexenone followed by the hydrolysis and treatment of the resulting 2-hydroxycyclohexanones with the second Grignard reagents. Similarly, 1,5-Diketones were obtained using 2-trimethylsiloxy-2-cyclopentenone as a starting material.
Synthesis and Enantiomer Recognition of Crown Ethers containing Cyclohexane-1,2-diol Derivatives as the Chiral Centre and Enzymatic Resolution of the Chiral Subunits
Naemura, Koichiro,Miyabe, Hajime,Shingai, Yasuhiro
, p. 957 - 959 (2007/10/02)
The cyclohexane-1,2-diol derivatives 1 and 4 of high optical purity have been prepared by enantioselective hydrolysis of their acetates (+/-)-2 and (+/-)-5 using pig liver esterase.The enantiomer recognition behaviour of the chiral crown ethers 11, 14, 15