Isothiourea-catalyzed synthesis of pyrrole- and indole-functionalized tetrasubstituted pyridines
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The generation of pyrrole- and indole-functionalized tetrasubstituted pyridines in a one-pot process from 2-(pyrrol-1-yl)acetic acid or 2-(indol-1-yl)acetic acid and α,β-unsaturated N-sulfonyl-ketimines is described. The process is proposed to operate via an isothiourea-catalyzed Michael addition-lactamization, followed by elimination of sulfinic acid and O-acylation to provide the final pyridine product.
Zhang , S , Hartley , W , Greenhalgh , M D , Ng , S , Slawin , A M Z & Smith , A D 2020 , ' Isothiourea-catalyzed synthesis of pyrrole- and indole-functionalized tetrasubstituted pyridines ' , ChemCatChem , vol. 12 , no. 18 , pp. 4522-4525 . https://doi.org/10.1002/cctc.202000882
Copyright © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
DescriptionFunding: Engineering and Physical Sciences Research Council (Grant Number(s): EP/L016419/1); FP7 Ideas: European Research Council (Grant Number(s): 279850)
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