全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Sambasivarao Kotha , Ongolu Ravikumar
来源:[J].Beilstein Journal of Organic Chemistry(IF 2.801), 2015, Vol.11 (1), pp.1259-1264DOAJ
摘要:Atom efficient processes such as the Diels–Alder reaction (DA) and the ring-rearrangement metathesis (RRM) have been used to design new polycycles. In this regard, ruthenium alkylidene catalysts are effective in realizing the RRM of bis-norbornene derivatives prepared by DA r...
作者:Liqin Zhao , Weigu Li , Zhifen Zhang
来源:[J].Chinese Science Bulletin(IF 1.319), 1998, Vol.43 (22), pp.1849-1864Springer
摘要:Abstract(#br)The conjecture E(k)⩽k is proved to be true if and only if k =1, 2, 3, where E(k) is the cyclicity of condimension k generic elementary polycycles. It is also proved that the cyclicity of any codimension 3 ensembles except ensembles with “lips” is ⩽6. By t...
作者:Xinxin Han , Qinhua Huang , Jie Ding ...
来源:[J].Separation Science and Technology(IF 1.164), 2005, Vol.40 (13), pp.2745-2759Taylor & Francis
摘要:Abstract(#br)The enantiomeric separation of a series of 13 new chiral polycycles has been examined on both cyclodextrin‐based and macrocyclic glycopeptide chiral stationary phases (CSPs) using HPLC in the normal phase, reversed phase, and polar organic modes. The most effect...
作者:Xue Wang , Yong Rok Lee
来源:[J].Tetrahedron(IF 2.803), 2011, Vol.67 (47), pp.9179-9184Elsevier
摘要:Abstract(#br)Efficient synthetic routes for biologically interesting polycycles with prenylated, geranylated, and farnesylated citrans were developed from several trihydroxybenzenes with prenyl, geranyl, and farnesyl groups on the benzene rings. Ethylenediamine diacetate-catalyz...
作者:Xue Wang , Yong Rok Lee
来源:[J].Tetrahedron(IF 2.803), 2009, Vol.65 (49), pp.10125-10133Elsevier
摘要:Abstract(#br)An efficient and concise synthetic route for biologically interesting polycycles bearing citran and chalcone nuclei was developed starting from a variety of trihydroxybenzenes with substituents on the ring. The key strategies involved an ethylenediamine diacetate-c...
作者:Prof. Dr. Tienan Jin , Dr. Jian Zhao , Prof. Dr. Naoki Asao ...
来源:[J].Chemistry – A European Journal(IF 5.831), 2014, Vol.20 (13), pp.3554-3576Wiley
摘要:... A variety of conjugated polycycles with planar, bowl‐shaped, and helical structures have been constructed in high efficiency and selectivity.
作者:Sambasivarao Kotha , Ongolu Ravikumar
来源:[J].European Journal of Organic Chemistry(IF 3.344), 2016, Vol.2016 (22), pp.3900-3906Wiley
摘要:A variety of structurally intricate polycycles have been assembled through ruthenium‐catalysed ring‐rearrangement metathesis of norbornene derivatives. The various substrates required for this work were prepared using Diels–Alder reactions and Grignard additions as key s...
作者:Xue-Qing Hou , Yan-Tao Sun , Lei Liu ...
来源:[J].Chinese Chemical Letters(IF 1.21), 2016, Vol.27 (8), pp.1166-1174Elsevier
摘要:Abstract(#br)The conjugated polycycles show excellent optical and electrical properties that are suitable for application in various organic electronics. While most of attentions have been paid to polycycles having planar π -conjugated system, the curved polycycles seem amaz...
作者:Tienan Jin , Masahiro Terada
来源:[J].Tetrahedron Letters(IF 2.397), 2020, Vol.61 (8)Elsevier
摘要:Abstract(#br)The development of new and efficient synthetic methodologies is regarded as one of the most streamlined approaches for the discovery of novel π-extended polycycles. This digest focuses on the illustration of recent advances on the synthesis of a variety of highly...
作者:Michael Veith , Hinka Hreleva , Julia Biegler ...
来源:[J].Phosphorus, Sulfur, and Silicon and the Related Elements(IF 0.601), 2004, Vol.179 (4-5), pp.651-660Taylor & Francis
摘要:In this preliminary review the reaction of [Ph2SiO]8[AlO(OH)]4 toward 1,3-diaminopropane and hexamethyldisilazane is discussed in view of supramolecular chemistry and access to structural transformations of the original polycycle. Two distinct adducts may be isolated in the ...

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