Efficient Base-Free Hydrogenation of Amides to Alcohols and Amines Catalyzed by Well-Defined Pincer Imidazolyl–Ruthenium Complexes
摘要:
Novel homogeneous ruthenium catalysts bearing an imidazolylaminophosphino pincer ligand have been synthesized. The active catalyst allows for the hydrogenation of a range of amides under base-free conditions to afford the corresponding alcohols and amines in high yields.
seven novel NImNHP‐type pincer imidazolylphosphineruthenium complexes has been synthesized and fully characterized. The use of hydrogenation of benzonitrile as a benchmark test identified [RuHCl(CO)(NImNHPtBu)] as the most active catalyst. With its stable Ru−BH4 analogue, in which chloride is replaced by BH4, a broad range of (hetero)aromatic and aliphaticnitriles, including industrially interesting
已合成并充分表征了一系列七个新型的N Im N H P型钳型咪唑基膦膦钌配合物。使用苯甲腈加氢作为基准测试,确定了[RuHCl(CO)(N Im N H P t Bu)]是最具活性的催化剂。凭借其稳定的Ru-BH 4类似物(其中氯化物被BH 4替代),已在温和且无碱的条件下氢化了多种(杂)芳族和脂肪族腈,包括工业上有用的己二腈。
Cobalt-Catalyzed Regioselective Olefin Isomerization Under Kinetic Control
作者:Xufang Liu、Wei Zhang、Yujie Wang、Ze-Xin Zhang、Lei Jiao、Qiang Liu
DOI:10.1021/jacs.8b01815
日期:2018.6.6
Olefin isomerization is a significant transformation in organic synthesis, which provides a convenient synthetic route for internal olefins and remote functionalization processes. The selectivity of an olefin isomerization process is often thermodynamically controlled. Thus, to achieve selectivity under kinetic control is very challenging. Herein, we report a novel cobalt-catalyzed regioselective olefin
Carbonyl and ester C–O bond hydrosilylation using κ<sup>4</sup>-diimine nickel catalysts
作者:Christopher L. Rock、Thomas L. Groy、Ryan J. Trovitch
DOI:10.1039/c8dt01857j
日期:——
complete ester C–O bond hydrosilylation was observed within 30 min at 25 °C to generate propylene and PhSi(OAc)3. The scope of this reaction was expanded to include six additional allyl esters, and under neat conditions, turnover frequencies of up to 990 h−1 were achieved. This activity is believed to be the highest reported for transition metal-catalyzed ester C–O bond hydrosilylation. Proposed mechanisms
[EN] METHOD FOR PRODUCING AMIDINE DERIVATIVES<br/>[FR] PROCÉDÉ DE PRODUCTION DE DÉRIVÉS D'AMIDINE
申请人:BIOCRYST PHARM INC
公开号:WO2016029216A2
公开(公告)日:2016-02-25
The invention provides methods and intermediates useful in the synthesis of a compound of formula (I): or a pharmaceutically acceptable salt, solvate, ester or prodrug thereof; wherein the variables are as defined herein.
Several NImNHP-Mn(I) pincercomplexes were synthesised and studied by a combination of experimental and theoretical investigations. Their interesting catalytic activities were shown in several hydrogenation reactions of N-heterocycles with good to excellent performance under very mild conditions.
通过实验和理论研究相结合,合成并研究了几种 N Im N H P-Mn(I) 钳配合物。它们在几个 N-杂环加氢反应中表现出有趣的催化活性,在非常温和的条件下具有良好至优异的性能。