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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Concurrent tandem catalysis ： ウィキペディア英語版 Concurrent tandem catalysis Concurrent tandem catalysis (CTC) is a technique in chemistry which uses multiple catalysts on a single molecule in a one-pot reaction to produce a product otherwise not accessible by a single catalyst.〔''Concurrent Tandem Catalysis'' Julia-Christina Wasilke, Stephen J. Obrey, R. Tom Baker and, and Guillermo C. Bazan Chemical Reviews 2005 105 (3), 1001-1020 〕 Scheme 1 illustrates this process. Molecule A enters this catalytic system to produce the comonomer, B, which along with A enters the next catalytic process to produce the final product, P. This one-pot approach can decrease product loss from isolation or purification of intermediates. Reactions with relatively unstable products can be generated as intermediates because they are only transient species and are immediately used in a consecutive reaction. ==Introduction== The major advantage of using CTC is it requires a single molecule; however, the required reaction conditions and catalyst compatibility are major hurdles to overcome. The system must be thoroughly studied to find the optimal conditions for both the catalysis and reactant to produce the desired product. Occasionally, a trade-off must be made between several competing effects. The desire of getting better yields and selectivity is of interest to many in academia and the industry. In this one-pot system, intermediate purification isn’t necessary, so the risk of unwanted products and side reactions are more probable. The catalysis is the key to the catalytic system. Matching compatible catalysts would eliminate the likelihood of a catalyst starving or saturating the system, which may cause the catalyst to decompose or generate unwanted side reactions.〔 If side products were to be generated, it may be capable of interfering with the catalytic system. Thus in-depth knowledge is required of the mechanistic characteristics of both catalytic processes and the activity of the catalysts. Kinetic measurements are a crucial instrument in the development of CTC processes. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Concurrent tandem catalysis」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.