Chiral crystallization of cis-2,3-dichloro-buth-2-ene-1,4-diol
摘要:
The X-ray diffraction study of cis-2,3-dichlorobuth-2-ene-1,4-diol (3) obtained by the reduction of 3,4-dichloro-5-ethoxy- and 5-isopropoxi-2(5H)-furanones with lithium aluminum hydride is performed. The crystals of compound 3 are trigonal: a = b = 15.746(9) , c = 6.848(4) ; V = 1470.5(15) (3), space group P3(1), Z = 9 (three independent molecules). Independent molecules have identical planar conformation, and hydroxyl groups are located on different sides of the multiple bond plane. The supramolecular motif of the crystal is spirals about the threefold screw axes; the neighboring spirals are linked by OHaEuro broken vertical bar O hydrogen bonds.
Efficient Synthesis of Novel γ-Substituted γ-Butenolides by Lewis Acid Catalyzed Addition of Metal Enolates of Active Methylene Compounds to Mucohalic Acids
作者:Ji Zhang、Koushik Das Sarma、Timothy T. Curran、Daniel T. Belmont、James G. Davidson
DOI:10.1021/jo050538t
日期:2005.7.1
Lewis acid catalyzed addition of activemethylenecompounds to mucochloric acid (1) and mucobromic acid (2) affording Knoevenagel aldol adducts, γ-substituted γ-butenolides, has been explored. Catalytic efficiencies of various Lewis acids have been compared. Indium acetate (0.25−5 mol %) was found to be the most efficient catalyst.
Design, synthesis, and<i>In vitro</i>antituberculosis activity of 2(5<i>H</i>)-Furanone derivatives
作者:Andile H. Ngwane、Jenny-Lee Panayides、Franck Chouteau、Lubabalo Macingwana、Albertus Viljoen、Bienyameen Baker、Eliya Madikane、Carmen de Kock、Lubbe Wiesner、Kelly Chibale、Christopher J. Parkinson、Edwin M. Mmutlane、Paul van Helden、Ian Wiid
DOI:10.1002/iub.1526
日期:2016.8
bacteria. It also showed synergistic activity with rifampicin (RIF) and additive activity with isoniazid (INH) and ethambutol (EMB). Additional time‐kill studies showed that the compound is bacteriostatic to mycobacteria, but cytotoxic to the Chinese Hamster Ovarian (CHO) cell line. From a second generation library, two compounds showed improved anti‐TB activity against M. tuberculosis H37Rv and decreased
Copper(I)-Catalyzed Alkyl- and Arylsulfenylation of 3,4-Dihalo-2(5<i>H</i>
)-furanones (X=Br, Cl) with Sulfoxides under Mild Conditions
作者:Liang Cao、Shi-He Luo、Han-Qing Wu、Liu-Qing Chen、Kai Jiang、Zhi-Feng Hao、Zhao-Yang Wang
DOI:10.1002/adsc.201700600
日期:2017.9.4
An efficient copper(I)/proline sodium salt‐catalyzed alkyl‐ and arylsulfenylation of C(sp2)–X 3,4‐dihalo‐2(5H)‐furanone compounds with sulfoxides is described. For inexpensive C(sp2)–Cl compounds, there is also a satisfactory reactivity with the moderate yields. This transformation provides a novel approach for the utilization of sulfoxides (not only DMSO) as sulfur source at mild temperatures without
Synthesis of artemisinin-piperazine-furan ether hybrids and evaluation of in vitro cytotoxic activity
作者:Meng-Xue Wei、Jia-Ying Yu、Xin-Xin Liu、Xue-Qiang Li、Meng-Wei Zhang、Pei-Wen Yang、Jin-Hui Yang
DOI:10.1016/j.ejmech.2021.113295
日期:2021.4
their in vitrocytotoxicactivity against some human cancer and benign cells. The absolute configuration of hybrid 5c was determined by X-ray crystallographic analysis. Hybrids 5a−h exhibited more pronounced growth-inhibiting action on hepatocarcinoma cell lines than their parent dihydroartemisinin (DHA) and the reference cytosine arabinoside (ARA). The hybrid 5a showed the best cytotoxicactivity against
Synthesis and biological evaluation of 4-biphenylamino-5-halo-2( 5H )-furanones as potential anticancer agents
作者:Yan-Cheng Wu、Shi-He Luo、Wen-Jie Mei、Liang Cao、Han-Qing Wu、Zhao-Yang Wang
DOI:10.1016/j.ejmech.2017.08.005
日期:2017.10
An efficient route without metal catalyst has been developed for synthesis of 4-biphenylamino-5-halo-2(5H)-furanones. The antitumor activities against various tumor cells of all the compounds have been evaluated by MTT assay. Among them, the compound 3j exhibits significant inhibitory activity against MCF-7 human breast cancer cells with an IC50 value of 11.8 μM and low toxicity toward HaCaT human