o-Iodoxybenzoic acid (IBX): a versatile reagent for the synthesis of N-substituted pyrroles mediated by β-cyclodextrin in water
摘要:
o-Iodoxybenzoic acid (IBX), a very mild and efficient hypervalent iodine(V) reagent, aromatizes diversely substituted 1-benzylpyrrolidines and N-substituted L-proline analogues to the corresponding substituted pyrroles in good to excellent yields under mild conditions mediated by beta-cyclodextrin in water at room temperature. To the best of our knowledge, this is the first report on IBX, promoting complete aromatization leading to N-benzylpyrroles from the corresponding saturated five membered heterocyclic derivatives in water medium. (C) 2011 Elsevier Ltd. All rights reserved.
Potassium carbonate as a base for the N-alkylation of indole and pyrrole in ionic liquids
作者:Yogesh R. Jorapur、Jae Min Jeong、Dae Yoon Chi
DOI:10.1016/j.tetlet.2006.01.129
日期:2006.4
for the N-alkylation of indole and pyrrole using potassium carbonate in 1-n-butyl-3-methylimidazolium tetrafluoroborate [bmim][BF4] as the sustainable reaction media with acetonitrile as the cosolvent is described herein. Our approach provides good yields with alkyl halides as well as sulfonates as the electrophiles. Cesium carbonate was also found to be a consistent base in the N-alkylation. The proposed
trans-4-Hydroxy-l-proline: a novel starting material for N-alkylpyrroles synthesis
作者:A. Vijay Kumar、K. Rama Rao
DOI:10.1016/j.tetlet.2011.04.045
日期:2011.6
resulting in the formation of N-alkylpyrroles in good to excellent yields, via decarboxylation followed by redox isomerization under neutral conditions. The neutral conditions allow access to efficient synthesis of N-alkyl pyrroles with high functional group tolerance.
o-Iodoxybenzoic acid (IBX): a versatile reagent for the synthesis of N-substituted pyrroles mediated by β-cyclodextrin in water
作者:S. Narayana Murthy、Y.V.D. Nageswar
DOI:10.1016/j.tetlet.2011.06.077
日期:2011.8
o-Iodoxybenzoic acid (IBX), a very mild and efficient hypervalent iodine(V) reagent, aromatizes diversely substituted 1-benzylpyrrolidines and N-substituted L-proline analogues to the corresponding substituted pyrroles in good to excellent yields under mild conditions mediated by beta-cyclodextrin in water at room temperature. To the best of our knowledge, this is the first report on IBX, promoting complete aromatization leading to N-benzylpyrroles from the corresponding saturated five membered heterocyclic derivatives in water medium. (C) 2011 Elsevier Ltd. All rights reserved.