Intramolecular NH···Pt Interactions of Platinum(II) Diimine Complexes with Phenyl Ligands
作者:Sayandev Chatterjee、Jeanette A. Krause、Allen G. Oliver、William B. Connick
DOI:10.1021/ic1007582
日期:2010.11.1
tpy = 2,2′:6′,2′-terpyridine], each of the Pt(pipNC)2(diimine) complexes undergoes diimine ligand dissociation to give back cis-Pt(pipNC)2 and free diimine ligand. Electrochemical measurements on the deprotonated complexes suggest that the piperidyl groups help to stabilize higher oxidationstates of the metal center, whereas protonation of the piperidyl groups has a destabilizing influence.
的Pt(pipNC)2(phen)的[pipNC - = 1-(哌啶基甲基)苯基阴离子; phen = 1,10-菲咯啉]是通过顺式-Pt(pipNC)2与phen反应制得的。晶体学和1 H NMR数据确定phen配体是二齿的,而每个哌啶基配体是单齿的,并在苯基的邻位键合到铂上。酸性条件下,可以分离出双质子化的Pt(pipNHC)2(二亚胺)2+加合物(二亚胺= phen,2,2'-联吡啶或5,5'-二三氟甲基-2,2'-联吡啶)。双质子化配合物的晶体学和光谱数据与涉及哌啶子基的H··Pt相互作用(2.32-2.51Å)一致,表明金属中心表现为布朗斯台德碱。金属-配体(二亚胺)的Pt的电荷转移状态(pipNHC)2(phen)的2+在溶液中不稳定,强烈(>2500厘米-1)相对于铂(pipNC)2(phen)的,与所述保持NH···Pt相互作用有效地降低了金属中心电子密度的观点。尽管Pt(
AZASPIRO DERIVATIVES AS TRPM8 ANTAGONISTS
申请人:RaQualia Pharma Inc.
公开号:US20170002016A1
公开(公告)日:2017-01-05
The present invention relates to azaspiro derivatives of the formula (I) or a pharmaceutically acceptable salt thereof or a prodrug thereof, processes for their preparation, pharmaceutical compositions containing them and their use in the treatment of various disorders which are mediated via the TRPM8 receptor.
A Manganese Pre-Catalyst: Mild Reduction of Amides, Ketones, Aldehydes, and Esters
作者:Colin M. Kelly、Robert McDonald、Orson L. Sydora、Mark Stradiotto、Laura Turculet
DOI:10.1002/anie.201709441
日期:2017.12.11
Hey Man(ganese): A newly prepared (N-phosphinoamidinate)manganese pre-catalyst (see Scheme) has been shown to be effective for the hydrosilative reduction of a diverse scope of carbonyl compounds, and in most cases can be used at room temperature. The reaction proceeds under reaction conditions which are competitive with the most effective transition-metal catalysts known for such transformations,
Tertiary amine-based glutathione peroxidase mimics: some insights into the role of steric and electronic effects on antioxidant activity
作者:Debasish Bhowmick、Govindasamy Mugesh
DOI:10.1016/j.tet.2012.09.020
日期:2012.12
In this work, several tertiary amine-based diaryl diselenides were synthesized and evaluated for their glutathioneperoxidase (GPx)-like antioxidantactivities using hydrogen peroxide, tert-butyl hydroperoxide and cumene hydroperoxide as substrates and thiophenol (PhSH) and glutathione (GSH) as co-substrates. A comparison of the GPx-like activity of 4-methoxy-substituted N,N-dialkylbenzylamine-based