开发了一种水溶性高效铱催化剂,用于将水中的醛化学选择性还原为醇。还原使用甲酸作为无痕还原剂,并使用水作为溶剂。它可以在空气中进行,而无需惰性气体保护。可以通过简单的萃取来纯化产物,而无需任何柱色谱法。催化剂负载量可以低至0.005mol%,并且转换频率(TOF)高至73800mol mol -1 h -1。各种各样的官能团,例如富电子或不足的(杂)芳烃和烯烃,烷氧基,卤素,酚,酮,酯,羧酸,氰基和硝基,都具有良好的耐受性,这表明其具有出色的化学选择性。
A water-soluble highly efficient iridium catalyst is developed for the chemoselective reduction of aldehydes to alcohols in water. The reductionuses formic acid as the traceless reducing agent and water as a solvent. It can be carried out in air without the need for inert atmosphere protection. The products can be purified by simple extraction without any column chromatography. The catalyst loading
开发了一种水溶性高效铱催化剂,用于将水中的醛化学选择性还原为醇。还原使用甲酸作为无痕还原剂,并使用水作为溶剂。它可以在空气中进行,而无需惰性气体保护。可以通过简单的萃取来纯化产物,而无需任何柱色谱法。催化剂负载量可以低至0.005mol%,并且转换频率(TOF)高至73800mol mol -1 h -1。各种各样的官能团,例如富电子或不足的(杂)芳烃和烯烃,烷氧基,卤素,酚,酮,酯,羧酸,氰基和硝基,都具有良好的耐受性,这表明其具有出色的化学选择性。
[EN] IRIDIUM-BASED CATALYSTS FOR HIGHLY EFFICIENT DEHYDROGENATION AND HYDROGENATION REACTIONS IN AQUEOUS SOLUTION AND APPLICATIONS THEREOF<br/>[FR] CATALYSEURS À BASE D'IRIDIUM DESTINÉS À DES RÉACTIONS HAUTEMENT EFFICACES DE DÉSHYDROGÉNATION ET D'HYDROGÉNATION EN SOLUTION AQUEUSE, ET APPLICATIONS ASSOCIÉS
申请人:TIGER INSTR LLC
公开号:WO2018194537A1
公开(公告)日:2018-10-25
A series of iridium-based catalysts for dehydrogenation of formic acid, and hydrogenation using formic acid as the hydrogen source, and the process using the catalyst(s) to produce hydrogen gas from formic acid solution, or to reduce aldehydes using formic acid, are disclosed and claimed. More specifically, the present invention relates to a group of pentamethylcyclopentadienyl (Cp*) iridium complexes with different Ν,Ν-bidentate ligands that catalyze dehydrogenation from formic acid, and chemo-selective hydrogenation of aldehydes, in the aqueous solution system in a highly efficient, and long life-time manner.
Phenethylamide derivatives with kinase inhibitory activity
申请人:Gould E. Alexandra
公开号:US20080064729A1
公开(公告)日:2008-03-13
The present invention provides novel phenethylamide compounds useful as inhibitors of protein kinases. The invention also provides pharmaceutical compositions comprising the compounds of the invention and methods of using the compositions in the treatment of various diseases.
Efficient Synthesis of Biomass-Derived N-Substituted 2-Hydroxymethyl-5-Methyl-Pyrroles in Two Steps from 5-Hydroxymethylfurfural
作者:Bartosz Wozniak、Yuehui Li、Sandra Hinze、Sergey Tin、Johannes G. de Vries
DOI:10.1002/ejoc.201800171
日期:2018.5.8
Renewable 5‐hydroxymethylfurfural (HMF) was hydrogenated in water by using a homogeneous iridium catalyst to give 1‐hydroxy‐2,5‐hexanedione (HHD) in 71 % yield of isolated product. The reaction of HHD with alkyl‐ or arylalkylamines in EtOH at room temperature gave the pyrroles in quantitative yields. This transformation could potentially be used as a click reaction.
A chemoselective iridium-catalyzed transfer hydrogenation of α, β-unsaturatedketones was realized in water. The CC double bonds of 2-benzylidene indanones and analogues were hydrogenated exclusively catalyzed by an iridium complex (0.1 mol%) bearing a pyridine-imidazoline ligand, using a mixture of formic acid/triethyl amine (molar ratio: 5/2) as a hydrogen source in water. A series of 2-benzyl indanones