在本研究中,研究了甲脒配体修饰的催化剂在酮的锌催化氢化硅烷化和二苯乙烯的铁催化环氧化中的能力。在氢化硅烷化的情况下,二乙基锌与易于获得的甲脒配体相结合,可以有效还原各种芳基和烷基酮。通过使用方便的原位催化剂系统,实现了高达 1.000 h -1 以上的高周转频率和广泛的官能团耐受性。此外,甲脒配体以良好的收率和化学选择性成功应用于二苯乙烯与过氧化氢的铁催化环氧化反应。
No base required: The first copper‐catalyzed asymmetric hydrosilylation of carbonyl compounds by using monodentate binaphthophosphepine ligands is presented. After optimization of the reaction parameters, high yields and enantioselectivities (up to 96 % ee) for a broad range of aryl alkyl, cyclic, heterocyclic, and aliphatic ketones are achieved without a base.
Postsynthetic Modification of Half-Sandwich Ruthenium Complexes by Mechanochemical Synthesis
作者:Wei-Guo Jia、Xue-Ting Zhi、Xiao-Dong Li、Jun-Peng Zhou、Rui Zhong、Haibo Yu、Richmond Lee
DOI:10.1021/acs.inorgchem.1c00059
日期:2021.4.5
A mild and environmentally friendly method to synthesize half-sandwichrutheniumcomplexes through the Wittig reaction between an aldehyde-tagged half-sandwichrutheniumcomplex and phosphorus ylide mechanochemically is reported herein. The mechanochemical synthesis of valuable half-sandwichrutheniumcomplexes resulted in a fast reaction, good yield with simple workup, and the avoidance of harsh reaction
In the present study, the zinc‐catalyzedhydrosilylation of various ketones to give their corresponding alcohols has been examined in detail. Diethyl zinc that can be modified by easily accessible phenol ligands allows the efficient reduction of various aryl and alkyl ketones. By using a practical in situ catalyst, excellent turnover frequencies up to 1000 h−1 and a broad functional group tolerance
在本研究中,已详细研究了各种酮的锌催化氢化硅烷化反应以生成相应的醇。可以通过容易获得的苯酚配体改性的二乙基锌可以有效还原各种芳基和烷基酮。通过使用实用的原位催化剂,可获得高达1000 h -1的出色转换频率和宽泛的官能团耐受性。
CARBOHYDRATE-GLYCOLIPID CONJUGATE VACCINES
申请人:Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.
公开号:US20150238597A1
公开(公告)日:2015-08-27
The present invention relates to the field of synthesizing and biologically evaluating of a novel class of carbohydrate-based vaccines. The new vaccines consist of a multi-modular structure which allows applying the vaccine to a whole variety of pathogenes. This method allows preparing vaccines against all pathogens expressing immunogenic carbohydrate antigens. As conjugation of antigenic carbohydrates to proteins is not required the conjugate vaccine is particularly heat stable. No refrigeration is required, a major drawback of protein-based vaccines.