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Supramolecular Encapsulation of Alagebrium by Cucurbit[7]uril Inhibited the h/d exchange of both its Carbonyl α-hydrogen and Thiazolium C（2）-hydrogen

Supramolecular Encapsulation of Alagebrium by Cucurbit[7]uri...

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全国第十八届大环化学暨第十届超分子化学学术讨论会

作者： Shengke Li Ruibing Wang State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical Sciences University of Macau

＜正＞Background Keto-enol tautomerism,which refers to the interconversion equilibrium between keto form and enol form,has drawn considerable interest due to its crucial role in both organic reaction and biological transformation.[1]Moreover,the degradation of many biologically important molecules is often attributed to the labile carbonylα-*** have previously reported

关键词： Cucurbituril Alagebrium Keto-enol Tautomerism h/d exchange C(2)-hydrogen

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Recent Advances in deuteration Reactions

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Chinese Journal of Chemistry 2024年第10期42卷 1145-1156页

作者： hao Li Muhammad Shabbir Wu Li Aiwen Lei Institutefor Advanced Studies(IAS) Collegeof Chemistry and Molecular SciencesWuhan UniversityWuhanHubei 430072China

The deuteration of organic compounds has attracted more attentions in recent years for the potential applications in new drug discovery and synthetic *** this purpose,many efficient deuterium labeling methodologies have been developed,including hydrogen isotope exchange(hIE),reductive deuteration,and dehalogenative deuteration that allow for the synthesis of selectively deuterated *** the last few years,great breakthroughs in selective isotope labeling have been achieved and the interest in new methodologies for the deuteration of organic molecules is *** this review,we summarized the recent developments in the selective deuteration of organic molecules since *** types of key processes in deuterium incorporation reactions,including h/d exchange,reductive deuteration and dehalogenative deuteration,are introduced and discussed.

关键词： deuterated compounds h/d exchange Reductive deuterations dehalogenative deuterations deuterium C-hactivation Synthetic methods

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Comparative Analysis of the Volatile Components in the Fresh Roots and Rhizomes of Curcuma wenyujin by Static headspace Gas Chromatography Mass Spectrometry

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Chinese Journal of Chemistry 2006年第10期24卷 1346-1351页

作者：方芳程志红郭寅龙蔡延奔 Shanghai Mass Spectrometry Center Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China Wenzhou Institute oflndustry and Science Research Wenzhou Zhejiang 325028 China

Static headspace GC-MS method coupled with h/d exchange was firstly developed to determine and identify the volatile components in the fresh root and rhizome of Curcuma wenyujin. The TIC chromatograms of 3 batches of fresh roots harvested at different time showed significant difference in the volatile components： the constitution was the same but the content of them was different. More than 60 volatile components in fresh roots （Root of C. wenyujin） and rhizomes （Rhizome of C. wenyujin） of C. wenyujin were detected, of which 51 and 48 volatile components were identified respectively. The fresh roots and rhizomes of C. wenyujin were found to have the similar volatile components. The contents of these components were calibrated by the response of β-elemene. In addition, the principal active component, β-elemene, was further confirmed and relatively quantified by its standard. γ-terpinene showed obvious allylic hydrogen/deuterium exchange using deuterium oxide which gave a new method to identify some compounds containing allylic hydrogen. At the same time, the active hydrogen compounds were also further confirmed. The results show that hS-GC-MS of volatile components from medical plants. method is a fast, simple and efficient way for the analysis

关键词： Curcuma wenyujin static headspace GC-MS h/d exchange volatile component

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Synthesis and characterization of Mh···hOR dihydrogen bonded ruthenium and osmium complexes（η~5-C_5h_4Ch_2Oh）Mh（PPh_3）_2（M = Ru, Os）

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Science China Chemistry 2014年第8期57卷 1079-1089页

作者： BAI Wei TSE Sunny Kai San LEE Ka ho SUNG herman ho-Yung WILLIAMS Ian duncan LIN ZhenYang JIA GuoChen department of Chemistry Institute for Advanced Study The Hong Kong University of Science and Technology

Treatment of RuCl2(PPh3)3 with 6-dimethylaminopentafulvene in ThF in the presence of water produced(η5-C5h4ChO) RuCl(PPh3)2, which was reduced by NaBh4 to give the Ru–h···hO dihydrogen bonded complex(η5-C5h4Ch2Oh) Ruh(PPh3)2. The dihydrogen bonded complex(η5-C5h4Ch2Oh)Ruh(PPh3)2 could also be synthesized by the reduction of complex(η5-C5h4ChO)Ruh(PPh3)2, which was obtained by the reaction of RuhCl(PPh3)3 with 6-dimethylaminopentafulvene in the presence of water. The analogous dihydrogen bonded osmium complex(η5-C5h4Ch2Oh)Osh(PPh3)2 was similarly prepared. Single crystal structures and dFT calculations support the presence of intra-molecular h···h interaction, with separations of around 1.9 to 2.0 .

关键词： ruthenium osmium hydride dihydrogen bonding h/d exchange

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