Facile Method for the Synthesis of Cyanoacrylates by Knoevenagel Condensation
作者:Thabile Mabaso、Nhlanhla Gracious Shabalala、Nagaraju Kerru、Sreekantha B. Jonnalagadda
DOI:10.1080/00304948.2020.1831894
日期:2021.1.2
(2021). Facile Method for the Synthesis of Cyanoacrylates by KnoevenagelCondensation. Organic Preparations and Procedures International: Vol. 53, No. 1, pp. 18-24.
Regioselective addition of pyrrole to methyl 3-aryl-2-cyanoacrylates was achieved, in high yields, with copper(II) triflate as the catalyst in toluene. C-Alkylated pyrroles afforded novel pyrrolizin-3-ones, in good to high yields and high diastereomeric ratio by an intramolecular cyclization reaction under mild reaction conditions.
with cyanoaokenes substituted with ester groups catalyzed by a Sn and Mg ate complex. The diastereoselectivity was affected by the halogen of the catalyst and electron‐withdrawing groups on the cyanoalkene. The transformation of the spirohexane was carried out to afford a cyclopentanoid which has been prepared only by a transition metal catalyst.
Microporous polyurethane material for size selective heterogeneous catalysis of the Knoevenagel reaction
作者:Sandeep Kumar Dey、Nader de Sousa Amadeu、Christoph Janiak
DOI:10.1039/c6cc02578a
日期:——
The first polyurethane material which is microporous (BET surface area of 312 m2 g‒1) is prepared by solvothermal synthesis and acts as highly efficient and recyclable heterogeneous catalyst in the...
AbstractA new series of nitenpyram analogs were designed by introducing 1,4-dihydropyridine to fix the pharmacophore (–C=C–NO2) into the cis-configuration, as confirmed by X-ray diffraction. Crystalstructure analysis showed that there was a homoconjugation effect on these cis-nitenpyram analogs, and a huge conjugated system comprising the 1,4-dihydropyridine scaffold and the ester group at the 3 position