Synthesis and Antibacterial Assay of Some New Pyrenyl Pyridine Candidates
作者:N. M. Khalifa、M. E. Haiba、M. M. Taha、M. A. Al-Omar
DOI:10.1134/s1070363219020245
日期:2019.2
Novel polycyclic compounds, 1-pyrene-based pyridone derivatives, are synthesized by treatment of pyrenyl acetohydtazide with several arylidenemalononitriles and acetylacetone. Intramolecular cyclization furnishes the functionalized substituted pyridine-2-ones with high yields. Structures of the products are elucidated from the spectral data. Tests on antibacterial activity of the products reveal their
Iodine-Catalyzed [3+2]-Cyclization of Substituted Benzylidenemalononitriles and Ethyl Glycinate Hydrochloride: Direct Access to 5-Amino-1H-pyrrole-2-carboxylates
作者:Cunde Wang、Zhenjie Su、Shan Wang、Naili Luo
DOI:10.1055/s-0040-1707466
日期:2020.6
An iodine-catalyzed [3+2]-cycloaddition reaction of substituted benzylidenemalononitriles and ethylglycinate hydrochloride in DMF has been developed for the synthesis of 5-amino-1H-pyrrole-2-carboxylates. This efficient method provides access to a variety of structurally diverse pyrrole-2-carboxylate derivatives. The structure of a typical product was confirmed by X-ray crystallography.
已开发出碘催化的 [3+2]-取代亚苄基丙二腈和甘氨酸乙酯盐酸盐在 DMF 中的 [3+2]-环加成反应,用于合成 5-氨基-1H-吡咯-2-羧酸盐。这种有效的方法提供了获得各种结构不同的 pyrrole-2-carboxylate 衍生物的途径。典型产物的结构由 X 射线晶体学证实。
Piperidine-Mediated [3 + 3] Cyclization of 2-Amino-4<i>H</i>-chromen-4-ones and 2-Benzylidenemalononitriles: To Access 2-Aminochromeno[2,3-<i>b</i>]pyridine Derivatives
作者:Dan Zhang、Naili Luo、Jianbo Gan、Xinyi Wan、Cunde Wang
DOI:10.1021/acs.joc.1c00797
日期:2021.7.2
Piperidine-mediated [3 + 3] cyclization of 2-amino-4H-chromen-4-ones and substituted 2-benzylidenemalononitriles was developed for the synthesis of 2-amino-4-aryl-5H-chromeno[2,3-b]pyridin-5-one derivatives. This novel transformation provides a highly efficient and facile route to functionalized 5H-chromeno[2,3-b]pyridines from readily available substrates under mild reaction conditions.
哌啶介导的 [3 + 3] 环化 2-amino-4 H -chromen-4-ones 和取代的 2-benzylidenemalononitriles 被开发用于合成 2-amino-4-aryl-5 H - chromeno[2,3- b ]pyridin-5-one 衍生物。这种新的转化为在温和反应条件下从容易获得的底物制备官能化的 5 H -色基[2,3- b ]吡啶提供了一种高效且简便的途径。
Synthesis of di/trifluoromethyl cyclopropane-dicarbonitriles <i>via</i> [2+1] annulation of fluoro-based diazoethanes with (alkylidene)malononitriles
作者:Cheng-Feng Gao、Yue-Ji Chen、Jing Nie、Fa-Guang Zhang、Chi Wai Cheung、Jun-An Ma
DOI:10.1039/d3cc03897a
日期:——
Herein, we describe a [2+1] annulation reaction of di/trifluorodiazoethane with (alkylidene)malononitriles. This protocol offers a streamlined synthesis of a wide range of stereospecific and densely functionalized difluoromethyl and trifluoromethyl cyclopropane-1,1-dicarbonitriles. Further functional group interconversions or skeletal elaborations afford structurally distinct cyclopropyl variants.
A rapid and greener MOF-2 catalyzed Knoevenagel reaction at room temperature
作者:Vikas D. Kadu、Bhagyashree C. Kotali、Pooja S. Wadkar、Machhindra S. Thokal、Rajkumar K. Godase
DOI:10.1016/j.tet.2023.133818
日期:2024.2
An efficient MOF-2 [Zn2(BDC)2] catalyzed process of Knoevenagelreaction has developed at room temperature using an eco-friendly reaction medium. The different substituted aldehydes studied with malononitrile as substrates and the derivatives were obtained in excellent yields with good tolerance of functional groups in the established Knoevenagel condensation approach.