We have developed an exceptional one-pot domino cyclization process, in which a nitroarene reduction step initiates an endocyclic Nicholas reaction followed by an intramolecular Pauson-Khand cyclization. Remarkably, all reactions in this process can be mediated by a cobalt carbonyl complex under mild conditions. (C) 2015 Elsevier Ltd. All rights reserved.
2-Aminobenzenesulfonamide-Containing Cyclononyne as Adjustable Click Reagent for Strain-Promoted Azide–Alkyne Cycloaddition
作者:Kyosuke Kaneda、Risa Naruse、Syota Yamamoto
DOI:10.1021/acs.orglett.7b00123
日期:2017.3.3
(ABSACN), starting from 2-nitrobenzenesulfonamide and but-2-yne-1,4-diol via Mitsunobu and Nicholas reactions, is described for the development of an adjustable alkyne reagent in click reactions. In a strain-promoted azide–alkyne cycloaddition (SPAAC) reaction, the reactivity of the alkyne is controlled by introducing various N-functionalities. The structure–reactivity relationship is found to be influenced