Modified Hydroborate Agent: (2,2′-Bipyridyl)(tetrahydroborato)zinc Complex, [Zn(BH<sub>4</sub>)<sub>2</sub>(bpy)], as a New, Stable, Efficient Ligand-Metal Hydroborate and Chemoselective Reducing Agent
作者:Behzad Zeynizadeh
DOI:10.1246/bcsj.76.317
日期:2003.2
rato)zinc complex, [Zn(BH4)2(bpy)], is a new white stable compound which has been used for efficient reduction of variety of carbonyl compounds such as aldehydes, ketones, acyloins, α-diketones and α,β-unsaturated carbonyl compounds (1,2-reduction) to their corresponding alcohols in acetonitrile at room temperature. Excellent chemoselectivity was also observed for the reduction of aldehydes over ketones
MODIFIED BOROHYDRIDE AGENTS, BIS (TRIPHENYLPHOSPHINE) (TETRA-HYDROBORATO)ZINC COMPLEX [Zn(BH<sub>4</sub> <sub>2</sub>(PPh<sub>3</sub>)<sub>2</sub>] AND (TRIPHENYLPHOSPHINE) (TETRAHYDROBORATO)ZINC COMPLEX [Zn(BH<sub>4</sub>)<sub>2</sub>(PPh<sub>3</sub>)]. NEW LIGAND METAL BOROHYDRIDES AS STABLE, EFFICIENT, AND VERSATILE REDUCING AGENTS
作者:Habib Firouzabadi、Mina Adibi、Mahboobeh Ghadami
DOI:10.1080/10426509808029675
日期:1998.11.1
corresponding mines and amides are described. Bis(triphenylphosphine)(tetrahydroboratro)zinc complex shows promising shelf stability and is much more stable than its mono triphenylphosphine analogue. The reducing ability of the two complexes is more or less the same.
Chemoselective Luche-Type Reduction of α,β-Unsaturated Ketones by Magnesium Catalysis
作者:Yoon Kyung Jang、Marc Magre、Magnus Rueping
DOI:10.1021/acs.orglett.9b03131
日期:2019.10.18
The chemoselective reduction of α,β-unsaturatedketones by use of an economic and readily available Mg catalyst has been developed. Excellent yields for a wide range of ketones have been achieved under mild reaction conditions, short times, and low catalyst loadings (0.2-0.5 mol %).
Pheromone synthesis. Part 262: Determination of the absolute configuration of the female sex pheromone [(1 S ,2 S )-(−)-(1,2-dimethyl-3-methylenecyclopentyl) acetaldehyde] of the pineapple mealybug ( Dysmicoccus brevipes ) by synthesis coupled with X-ray analysis
作者:Kenji Mori、Jun Tabata
DOI:10.1016/j.tet.2017.09.046
日期:2017.11
synthesized. Chirality was introduced by means of lipase-catalyzed asymmetric acetylation of (±)-2,3-dimethyl-2-cyclopenten-l-ol. X-rayanalysis of (−)-camphanate ester of (1S,2S)-(−)-2-(1,2-dimethyl-3-methylenecyclopentyl)ethanol confirmed its (1S,2S)-absolute configuration. The natural pheromone was identified with the (1S,2S)-aldehyde by comparing the specific rotation, enantioselective GC retention
Titanyl Acetylacetonate as an Efficient Catalyst for Regioselective 1,2-Reduction of α,β-Unsaturated Carbonyl Compounds and Conversion of α-Diketones & Acyloins to Vicinal Diols with Sodium Borohydride
作者:Behzad Zeynizadeh
DOI:10.1002/jccs.200500076
日期:2005.6
and ketones were reduced readily and exclusively to their corresponding allylic alcohols with NaBH 4 and catalytic amounts oftitanyl acetylacetonate at room temperature. Reduction reactions were carried out in CH 3 CN or THF. This reducing system was also efficient for the reduction of α-diketones and acyloins to their correspondingvicinaldiols in CH 3 CN.