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.
Synthesis of Substituted γ- and δ-Lactams via Pd-Catalyzed Alkene Carboamination Reactions
作者:Jordan R. Boothe、Yifan Shen、John P. Wolfe
DOI:10.1021/acs.joc.7b00041
日期:2017.3.3
substituted γ- and δ-lactams via palladium-catalyzedalkenecarboaminationreactions between aryl halides and alkenes bearing pendant amides is described. The substrates for these reactions are generated in 1–3 steps from commercially available materials, and products are obtained in good yield with up to >20:1 diastereoselectivity. The stereochemical outcome of the alkene addition is consistent with a
Expedited Synthesis of Matrine Analogues through an Oxidative Cascade Addition/Double-Cyclization Radical Process
作者:Simón Olguín-Uribe、Marco V. Mijangos、Yoarhy A. Amador-Sánchez、Miguel A. Sánchez-Carmona、Luis D. Miranda
DOI:10.1002/ejoc.201700208
日期:2017.5.3
nicotinate–xanthate derivative to N-allylindoles and N-allylpyrroles resulted in polycyclic heterocycle-fused pyridonaphthyridines through a tandemradical intermolecular/intramolecular oxidative addition reaction sequence that created three new C–C bonds and two new rings in a single event. Such polyheterocycles showcase the matrine alkaloid framework and are similar to indole–monoterpenoid natural products
aggregation-induced emission (AIE) active units and explore their optical properties and inherent mechanism. In this paper, two newly designed and synthesized difluoroboronβ-diketonate complexes (TPE-BF2-2AP and TPE-BF2-2MP) with tetra (phenyl) ethylene (TPE) and N-alkyl pyrrole unit exhibit solvatochromism, AIE and mechanochromic properties. Although the alkyl substituents with slight difference, TPE-BF2-2AP
A novel pyrrole derivative represented by the following formula (1) and a salt thereof:
1
wherein R
1
means substituted alkenyl, etc.; R
2
means substituted benzoyl, etc.; and R
3
to R
5
each means hydrogen, alkyl, halogeno, etc. The derivative and salt have antidiabetic activity.