Pd(OH)<sub>2</sub>/C-Mediated Selective Oxidation of Silyl Enol Ethers by <i>tert</i>-Butylhydroperoxide, a Useful Method for the Conversion of Ketones to α,β-Enones or β-Silyloxy-α,β-enones
作者:Jin-Quan Yu、Hai-Chen Wu、E. J. Corey
DOI:10.1021/ol050284y
日期:2005.3.1
[reaction: see text] Pd(OH)2-catalyzed oxidation of silyl enol ethers by t-BuOOH gives either beta-silyloxy-alpha,beta-enones or alpha,beta-enones in good yields depending on the base used.
Concurrent resolution and oxidation of an allylic acetate and its utilization in the diastereocontrolled synthesis of some cyclopentanoid monoterpenes
作者:Hiroshi Nagata、Kunio Ogasawara
DOI:10.1016/s0040-4039(99)01321-0
日期:1999.9
Racemic endo-4-acetoxybicyclo[3.2.1]oct-2-ene furnishes enantiopure (+)-bicyclo[3.2.1]oct-3-en-2-one and its dihydro derivative leaving enantiopure (+)-endo-4-acetoxybicyclo[3.2.1]oct-2-ene in a phosphate buffer solution in the presence of a lipase (Candida antarctica) and palladium(II) chloride. Utilizing the products, a diastereocontrolled route to some cyclopentanoid monoterpenes has been established
Enantioselective intramolecular cyclizations of prochiral cyclohexanones using chiral lithium amide bases
作者:Jeffrey E. Kropf、Steven M. Weinreb
DOI:10.1039/a807052k
日期:——
The first examples of intramolecular cyclizations of prochiral cyclohexanones with chiral lithium amide bases have been effected in good yields and enantiomeric ratios.
手性环己酮与手性锂酰胺碱分子内环化反应的首批实例已经实现,且收率和对映体比率良好。
Hayes, Christopher J.; Simpkins, Nigel S.; Kirk, Douglas T., Journal of the American Chemical Society, 2009, vol. 131, p. 8196 - 8210
作者:Hayes, Christopher J.、Simpkins, Nigel S.、Kirk, Douglas T.、Mitchell, Lee、Baudoux, Jerome、et al.
DOI:——
日期:——
Diplogelasinospora grovesii IMI 171018, a new whole cell biocatalyst for the stereoselective reduction of ketones
作者:José D. Carballeira、Emilio Álvarez、Mercedes Campillo、Leonardo Pardo、José V. Sinisterra
DOI:10.1016/j.tetasy.2004.01.034
日期:2004.3
and showed very high activity and stereoselectivity in the reduction of cyclicketones. The fungus was selected due to its selectivity towards monocyclic and bicyclicketones and its easy culture conditions, which allow an easy scale-up. D. grovesii is more active in the reduction of conventional ketones than S. cerevisiae type II (from Sigma) and can work in the presence of highketone concentrations