[EN] 2-(PIPERAZINE-2-YL) ACETONITRILE DERIVATIVE, PREPARATION METHOD FOR, AND USE THEREOF [FR] DÉRIVÉ DE 2-(PIPÉRAZINE-2-YL)ACÉTONITRILE, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION [ZH] 2-(哌嗪-2-基)乙腈类衍生物及其制备方法和应用
Unexpected <i>ortho</i>-Heck Reaction under the Catellani Conditions
作者:Alexander J. Rago、Guangbin Dong
DOI:10.1021/acs.orglett.0c00952
日期:2020.5.15
An unexpected ortho-Heck reaction has been discovered during the study of palladium/norbornene (Pd/NBE) catalysis. Under the Catellani reaction conditions in the presence of lithium salts and olefins, Heck coupling takes place at the ortho position instead of the commonly observed ipso position; meanwhile, a norbornyl group is introduced at the arene ipso position. Systematic deuterium labeling and
The present invention relates to new substituted 4-amino-piperidine opioid receptor modulators, pharmaceutical compositions thereof, and methods of use thereof.
本发明涉及新的取代4-氨基哌啶类阿片受体调节剂,其药物组成物以及使用方法。
Catalytic Enantioselective Hetero-dimerization of Acrylates and 1,3-Dienes
作者:Stanley M. Jing、Vagulejan Balasanthiran、Vinayak Pagar、Judith C. Gallucci、T. V. RajanBabu
DOI:10.1021/jacs.7b10055
日期:2017.12.13
counterion, and solventeffects uncovered during the course of these investigations show a unique role of a possible cationic Co(I) intermediate in these reactions. The rational evolution of a mechanism-based strategy that led to the eventual successful outcome and the attendant support studies may have further implications for the expanding use of low-valent group 9 metal complexes in organic synthesis
Mechanism of Cobalt-Catalyzed Heterodimerization of Acrylates and 1,3-Dienes. A Potential Role of Cationic Cobalt(I) Intermediates
作者:Montgomery Gray、Michael T. Hines、Mahesh M. Parsutkar、A. J. Wahlstrom、Nicholas A. Brunelli、T. V. RajanBabu
DOI:10.1021/acscatal.9b05455
日期:2020.4.3
of reaction progress kinetic analysis (RPKA) of a prototypical dimerization reaction and characterization of isolated low-valent cobalt catalyst precursors involved, several important details of the mechanism of this reaction have emerged. (i) The prototypical reaction has an induction period that requires at least 2 h of stir time to generate the competent catalyst. (ii) Reduction of a Co(II) complex
Synthesis and evaluation of 13C-labeled 5-5-dimethyl-1-pyrroline-N-oxide aimed at in vivo detection of reactive oxygen species using hyperpolarized 13C-MRI
作者:Keita Saito、Deepak Sail、Kazutoshi Yamamoto、Shingo Matsumoto、Burchelle Blackman、Shun Kishimoto、Jeffrey R. Brender、Rolf E. Swenson、James B. Mitchell、Murali C. Krishna
DOI:10.1016/j.freeradbiomed.2018.11.013
日期:2019.2
13C-labeled DMPO for hyperpolarization by dynamic nuclear polarization, in which 13C NMR signal increases more than 10,000-fold. This allows in vivo 13C MRI to investigate the feasibility of in vivo ROS detection by the 13C-MRI. DMPO was 13C-labeled at C5 position, and deuterated to prolong the T1 relaxation time. The overall yield achieved for 5-13C-DMPO-d9 was 15%. Hyperpolarized 5-13C-DMPO-d9 provided