High- and Low-Valent tris-N-Heterocyclic Carbene Iron Complexes, Carola S. Vogel
Автор: Frank Glorius Название: N-Heterocyclic Carbenes in Transition Metal Catalysis ISBN: 364207197X ISBN-13(EAN): 9783642071973 Издательство: Springer Рейтинг: Цена: 43100.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This thesis focuses on NHC-catalyzed annulation of nitroalkenes, enals and ?,?-unsaturated carboxylic acids. (1) NHCs were found to be efficient catalysts for the [4+2] annulation of ?-substituted nitroalkenes. The scope of Rauhut–Currier reaction was successfully extended to the most challenging ?-substituted alkenes by this method; (2) Enals were successfully used for [4+2] annulations with azodicarboxylates catalyzed by NHC via ?-addition. Highly enantiopure tetrahydropyridazinones and ?-amino acid derivatives could be easily prepared by subsequent transformations of the resulting dihydropyridazinones. (4) The readily available ?,?-unsaturated carboxylic acids were first successfully employed to generate the ?,?-unsaturated acyl azolium intermediates by using NHC for the enantioselective [3+2] and [3+3] annulations.
Описание: Detailed chemical synthesis, in vitro and/or in vivo anti-cancer activities are clearly presented including: (i) a class of Au(III) complexes containing a highly fluorescent N^N^N ligand and NHC ligand that simultaneously act as fluorescent thiol "switch-on" probes and anti-cancer agents;
Автор: Radha R. Gupta; Mahendra Kumar; Vandana Gupta Название: Heterocyclic Chemistry ISBN: 3642084605 ISBN-13(EAN): 9783642084607 Издательство: Springer Рейтинг: Цена: 11753.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Today, our world increasingly is conceived of as being molecular. An ever widening range of phenomena are described logically in terms of molecular properties and molecular interactions. The majority ofknown molecules are heterocyclic and heterocycles dominate the fields ofbiochemistry, medicinal chemistry, dyestuffs, photographic science and are of increasing importance in many others, including polymers, adhesives, and molecular engmeenng. Thus, the importance of heterocyclic chemistry continues to increase and this three volume work by Drs. R. R. Gupta, Mahendra Kumar and Vandana Gupta is a welcome addition to the available guides on the subject. Its scope places it in a useful niche between the single-volume texts and monographs ofheterocyclic chemistry and the multivolume treatises. The authors have retained the well tried classical approach but have succeeded in placing their own individual spin on their arrangement. They have put together a well selected range from among the most important ofthe vast array of facts available. This factual material is ordered in a clear and logical fashion over the three volumes. The present work should be of great value to students and practitioners ofheterocyclic chemistry at all levels from the advanced undergraduate upwards. It will be of particular assistance in presenting a clear and modem view of the subject to those who use heterocycles in a variety of other fields and we wish it well.
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