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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 Intermolecular metal-catalyzed carbenoid cyclopropanations ： ウィキペディア英語版 Intermolecular metal-catalyzed carbenoid cyclopropanations Intermolecular metal-catalyzed carbenoid cyclopropanations are organic reactions that result in the formation of a cyclopropane ring from a metal carbenoid species and an alkene.〔Davies, H. M. L.; Antoulinakis, E. G. ''Org. React.'' 2001, ''57'', 1. 〕 In the Simmons–Smith reaction the metal involved is zinc. ==Introduction== Cyclopropanes may be formed through the reaction of a metal carbenoid species (generated through the reaction of a diazo compound with a transition metal) and an olefin. Although the intramolecular variant of this reaction has been known since 1961,〔Burke, S. D.; Grieco, P. A. ''Org. React.'' 1979, ''26'', 361.〕 chemo- and stereoselective intermolecular metal-catalyzed cyclopropanation reactions employing diazocarbonyl compounds are more recent. Rhodium carboxylate complexes, such as dirhodium tetraacetate, are most commonly used to catalyze this transformation.〔Paulissen, R.; Reimlinger, H.; Hayez, E.; Hubert, A. J.; Teyssie, P. ''Tetrahedron Lett.'' 1973, 2233.〕 Enantioselective cyclopropanations have been developed and typically make use of pre-formed chiral rhodium carboxylate complexes derived from chiral carboxylate ligands.〔Singh, V. K.; Arpita, D.; Sekar, G. ''Synthesis'' 1997, 137.〕 ''(1)''File:IntraCPGen.png 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「Intermolecular metal-catalyzed carbenoid cyclopropanations」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.