synthesis of aryl alkyl ethers has been described. DMSO is employed as the mild terminal oxidant. This novel methodology offers a metal‐free reaction condition, operational simplicity and broad substrate scope to afford valuable products from inexpensive reagents. Various meta‐substituted aromatic ethers which are hardly synthesized from the reported methods requiring meta‐substituted phenols, are efficiently
Asymmetric Hydrogenation of α,α′-Disubstituted Cycloketones through Dynamic Kinetic Resolution: An Efficient Construction of Chiral Diols with Three Contiguous Stereocenters
Chiral diols with threecontiguousstereocenters were synthesized by a highly enantioselective ruthenium‐catalyzedasymmetric hydrogenation of racemic α,α′‐disubstituted cycloketones involving dynamic kineticresolution. This new catalytic asymmetric method provides a concise route to the alkaloid (+)‐γ‐lycorane.
[EN] CHEMICAL PROCESSES AND COMPOUNDS DERIVED THEREFROM<br/>[FR] PROCÉDÉS CHIMIQUES ET COMPOSÉS DÉRIVÉS DE CEUX-CI
申请人:UNIV MONASH
公开号:WO2006012683A1
公开(公告)日:2006-02-09
The present invention relates to N-substituted anilines and derivatives thereof and in particular to chemical processes for the preparation of N-substituted anilines and derivatives thereof.
本发明涉及N-取代苯胺及其衍生物,特别是用于制备N-取代苯胺及其衍生物的化学过程。
Aqueous chemoenzymatic one-pot enantioselective synthesis of tertiary α-aryl cycloketones <i>via</i> Pd-catalyzed C–C formation and enzymatic CC asymmetric hydrogenation
An aqueous chemoenzymatic cascade reaction combining Pd-catalyzed C–C formation and enzymatic CC asymmetric hydrogenation (AH) was developed for enantioselective synthesis of tertiary α-aryl cycloketones in good yields and excellent enantioselectivities. The stereopreference of the enzyme in AH of α-aryl cyclohexenones was studied. An enantiocomplementary enzyme was obtained by site-directed mutation
Versatile Cu<sup>I</sup>/Pd<sup>0</sup>Dual Catalysis for the Synthesis of Quaternary α-Allylated Carbonyl Compounds: Development, Mechanistic Investigations and Scope
We report herein a versatile cooperative dual catalysis reaction based on a CuI/Pd0 system. Mechanisticinvestigation shows that every component plays a crucial role in determining the reaction outcome. The reaction is successfully extended to various substrates; such as α,β‐unsaturated ketones, malonates and coumarins. The strategy tolerates different substitution patterns and affords good yields
我们在此报告了一种基于Cu I / Pd 0系统的通用协同双重催化反应。机理研究表明,每个组分在确定反应结果中都起着至关重要的作用。反应成功地扩展到了各种底物上。例如α,β-不饱和酮,丙二酸酯和香豆素。该策略容许不同的取代模式,并为每个底物家族提供良好的产率。