Synthesis and Glutathione Peroxidase-like activity of N-heterocyclic carbene derived cationic diselenides
作者:Sudesh T. Manjare、Harkesh B. Singh、Ray J. Butcher
DOI:10.1016/j.tet.2012.09.024
日期:2012.12
Water soluble cationic diselenide derivatives of benzimidazolin-2-selenones and imidazolin-2-selenones have been synthesized. The Glutathione Peroxidase-like (GPx-like) activities of cationic diselenides have been investigated for the first time. The GPx-like activities are found to be quite low as compared to the neutral imidazole based diselenide and intramolecularly coordinated diselenides. A mechanism
Revealing the unusual role of bases in activation/deactivation of catalytic systems: O–NHC coupling in M/NHC catalysis
作者:Victor M. Chernyshev、Oleg V. Khazipov、Maxim A. Shevchenko、Andrey Yu. Chernenko、Alexander V. Astakhov、Dmitry B. Eremin、Dmitry V. Pasyukov、Alexey S. Kashin、Valentine P. Ananikov
DOI:10.1039/c8sc01353e
日期:——
intramolecular reducing agents for the transformation of M(II) into “ligandless” M(0) species. This demonstrates that the disclosed base-mediated O–NHC coupling reaction is integrated into the catalytic M/NHC systems and can define the mechanism of catalysis (molecular M/NHC vs. “NHC-free” cocktail-type catalysis). A proposed mechanism of the revealed transformation includes NHC-OR reductive elimination, as
金属(M)与N-杂环卡宾(NHC)配体的络合物通常会在明显影响性能的氧碱的存在下催化许多反应。人们普遍认为,底物激活(例如铃木交叉偶联中的金属转移)或HX捕获(例如,在各种C–C和C–杂原子耦合,Heck反应,C–H功能化中)都需要碱,杂环化等)。这项研究提供了对M(II)/ NHC(M = Pd,Pt,Ni)配合物在溶液中的行为的见解,该配合物在常规参与催化的碱(KOH,NaOH,t- BuOK,Cs 2 CO 3,K)的作用下2一氧化碳3,等等)。公开了在典型的碱介导的M / NHC催化的反应条件下M( II)/ NHC络合物的先前未解决的转化。在催化中广泛使用的Pd( II)和Pt( II)配合物通过O–NHC偶联机理与碱反应生成M(0)物种和2(5)-氧代取代的唑。Ni(NHC) 2 X 2络合物在氢氧化钾水溶液存在下水解,并经过相同的O–NHC偶联,在t的作用下得到偶氮酮和金属镍
Vernin, Gaston; Domlog, Hicham; Siv, Chan, Journal of Heterocyclic Chemistry, 1981, vol. 18, p. 85 - 89
作者:Vernin, Gaston、Domlog, Hicham、Siv, Chan、Metzger, Jaques、El-Shafei, Ahmed Kamal
DOI:——
日期:——
VERNIN G.; DOMLOG H.; SIV C.; METZGER J., J. HETEROCYCL. CHEM., 1981, 18, NO 1, 85-89
作者:VERNIN G.、 DOMLOG H.、 SIV C.、 METZGER J.
DOI:——
日期:——
FUSED CYCLIC UREA DERIVATIVES AS CRHR2 ANTAGONIST
申请人:RaQualia Pharma Inc.
公开号:US20210078975A1
公开(公告)日:2021-03-18
The present invention relates to fused cyclic urea derivatives which have antagonistic activities against CRHR1 and/or CRHR2, and which are useful in the treatment or prevention of disorders and diseases in which CRHR1 and/or CRHR2 is involved. The invention also relates to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which CRHR1 and/or CRHR2 is involved.