71897-59-1Relevant academic research and scientific papers
Thioglycerol-Stabilized Rhodium Nanoparticles in Biphasic Medium as Catalysts in Multistep Reactions
Guerrero-Ríos, Itzel,Portales-Martínez, Benjamín,Reina, Antonio,Serrano-Maldonado, Alejandro
supporting information, (2020/07/04)
Small rhodium nanoparticles (ca. 3.5 nm) were prepared by the decomposition of an organometallic precursor under hydrogen pressure in glycerol using 1-thioglycerol as stabilizer. Full characterization in the solid state [HR-TEM, EDX, XPS] showed a fcc structure for the Rh0/RhI nanoparticles capped with thiolate ligand. Reduction of different functionalities, including nitro groups and imines, was applied to tandem reductive amination of aldehydes with primary and secondary amines, and to the synthesis of N-substituted anilines from nitrobenzene. In addition, thiolate-capped RhNPs could be recovered and reused up to 5 runs without loss of activity nor selectivity.
A practical catalytic reductive amination of carboxylic acids
Andrews, Keith G.,Denton, Ross M.,Hirst, David J.,Stoll, Emma L.,Tongue, Thomas,Valette, Damien
, p. 9494 - 9500 (2020/10/02)
We report reductive alkylation reactions of amines using carboxylic acids as nominal electrophiles. The two-step reaction exploits the dual reactivity of phenylsilane and involves a silane-mediated amidation followed by a Zn(OAc)2-catalyzed amide reduction. The reaction is applicable to a wide range of amines and carboxylic acids and has been demonstrated on a large scale (305 mmol of amine). The rate differential between the reduction of tertiary and secondary amide intermediates is exemplified in a convergent synthesis of the antiretroviral medicine maraviroc. Mechanistic studies demonstrate that a residual 0.5 equivalents of carboxylic acid from the amidation step is responsible for the generation of silane reductants with augmented reactivity, which allow secondary amides, previously unreactive in zinc/phenylsilane systems, to be reduced.
Palladium-Catalyzed Benzylic C-H Arylation of Azaarylmethylamines
Kim, Byeong-Seon,Jiménez, Jacqueline,Gao, Feng,Walsh, Patrick J.
supporting information, p. 5788 - 5791 (2015/12/11)
A direct C-H functionalization approach to produce aryl(azaaryl)methylamines from azaarylmethylamines without directing groups is described. Under conditions where the azaarylmethylamines' C-H is reversibly deprotonated, a Pd(OAc)2/NIXANTPHOS-b
SYNTHESIS OF 2-AMINOMETHYLPYRIDINES FROM AMINONITRILES AND ACETYLENE
Ivanov, A. P.,Levin, D. Z.,Mortikov, E. S.,Promonenkov, V. K.
, p. 566 - 570 (2007/10/02)
2-Aminomethylpyridines were synthesized from α-aminonitriles containing various substitutents at the α-carbon atom and acetylene at elevated pressures and temperatures in the presence of η5-dicyclopentadienylcobalt (cobaltocene) as catalyst.The
Anti-asthmatic, anti-allergic, anti-cholinergic, bronchodilator and anti-inflammatory 1-[(benzoylphenyl)-lower-alkyl]piperidines and analogs thereof
-
, (2008/06/13)
1-[(3- or 4-Benzoylphenyl)-lower-alkyl]-[(CH2)n --N=B]-substituted-piperidines, useful as anti-asthmatic, anti-allergic, anti-cholinergic, bronchodilator and anti-inflammatory agents, are prepared by alkylation of an appropriate subs
Benzoylphenyl lower alkanoyl piperidines
-
, (2008/06/13)
1-[(3- or 4-Benzoylphenyl)-lower-alkyl]-[(CH2)n -N=B]-substituted-piperidines, useful as anti-asthmatic, anti-allergic, anti-cholinergic, bronchodilator and anti-inflammatory agents, are prepared by alkylation of an appropriate subst
