[EN] PYRROLO [2, 3-B] PYRIDINES OR PYRROLO [2, 3-B] PYRAZINES AS HPK1 INHIBITOR AND THE USE THEREOF [FR] PYRROLO [2, 3-B] PYRIDINES OU PYRROLO [2, 3-B] PYRAZINES COMME INHIBITEUR DE HPK1 ET LEUR UTILISATION
Palladium-catalyzed Heck coupling of arylhydrazines via C–NHNH<sub>2</sub>bond activation
作者:Jin-Biao Liu、Fu-Jiao Chen、Na Liu、Jiang Hu
DOI:10.1039/c5ra05131b
日期:——
A novel palladium-catalyzed Heck coupling reaction of arylhydrazines with olefins is described, which affords various styrenes with high efficiency. This transformation proceeds through a C–NHNH2bond activation under mild conditions.
Multifunctional and robust covalent organic framework–nanoparticle hybrids
作者:Pradip Pachfule、Manas K. Panda、Sharath Kandambeth、S. M. Shivaprasad、David Díaz Díaz、Rahul Banerjee
DOI:10.1039/c4ta00284a
日期:——
into a stable, crystalline and porous covalent organic framework (COF), TpPa-1, by a solution infiltration method using NABH4 as a reducing agent. High resolution and dark field TEM images confirmed the uniform loading of the Pd(0) nanoparticles into the TpPa-1 matrix without aggregation. This hybridmaterial exhibited excellent catalytic activity towards the Cu free Sonogashira, Heck and sequential
Phosphine-free palladium-catalyzed MizorokiâHeck reaction was performed using ball-milling in polyethylene glycol under mild conditions. Good to excellent yields of coupling products were obtained. This activation technique also allowed the concomitant formation of round shaped PdâPEG nanoparticles that were characterized by TEM analysis.
Asymmetric synthesis of syn- and anti-α-deuterio-β3-phenylalanine derivatives
作者:Stephen G. Davies、Emma M. Foster、Catherine R. McIntosh、Paul M. Roberts、Timothy E. Rosser、Andrew D. Smith、James E. Thomson
DOI:10.1016/j.tetasy.2011.06.008
日期:2011.5
The conjugate addition of lithium (S)-N-benzyl-N-(alpha-methylbenzyl)amide to a range of aryl substituted tert-butyl cinnamate esters followed by reaction of the resultant lithium beta-amino enolates with D2O provides access to anti configured alpha-deuterio-beta-aminocinnamate esters in high dr. The corresponding syn configured diastereoisomers were also obtained with high diastereoselectivity via the conjugate addition of lithium (5)-N-benzyl-N-(alpha-methylbenzyl)amide to a range of tert-butyl alpha-deuteriocinnamate esters followed by reaction of the resultant lithium beta-amino enolates with 2-pyridone. After deprotection both the syn- and anti-diastereoisomers of the corresponding alpha-deuterio-beta(3)-amino acids can be isolated in high dr. (C) 2011 Elsevier Ltd. All rights reserved.