肼酰氯与 2,3-二氯-1,4-萘醌的反应在分批和流动合成方法下产生了药学上重要的螺-萘-1,2'-[1,3,4]恶二唑-4-酮。区域选择性环加成方案在温和条件下运行,可耐受多种结构部分,并高效提供多功能螺恶二唑基序。所得产物经IR、1 H NMR、13 C NMR、HRMS和化合物6h鉴定采用单晶 X 射线衍射技术对其进行了表征。合成的分子在 DFT/B3LYP/def2-TVZP 水平上通过量子化学计算进行了理论分析,为实验结果提供了支持数据。此外,还报道了一些选定的新型螺环分子的简明生物学评价。
cycloaddition of nitrile imines with 3-alkenyl-oxindoles was catalyzed by a new chiral Mg(ClO4)2 complex of an N,N′-dioxide ligand. The reaction is so far the sole catalytic synthesis of spiro-pyrazoline-oxindole derivatives. A wide variety of substrates were explored to obtain good yields (up to 98%) and excellent enantioselectivities (up to 99%). This cycloaddition expands the scope of propargyl anion type 1
Certain benzoyl chloride phenylhydrazones have been found to be active against insects and mites, and they have also been found to be effective, broad-spectrum anthelmintics for suppressing parasitic worms in animals, particularly sheep. The benzoyl ring and the phenylhydrazone ring can be substituted with a halogen atom, a nitro group, or an alkyl group of from 1 to 6 carbon atoms, inclusive. A new class of pentahalobenzoyl chloride phenylhydrazones is described, particularly pentafluorobenzoyl chloride phenylhydrazones. The compounds are prepared by reacting a benzoic acid phenylhydrazide with phosphorus pentachloride to obtain a benzoyl chloride (dichlorophosphinyl)phenylhydrazone that is reacted with phenol to produce the desired benzoyl chloride phenylhydrazones. Certain of the compounds can be prepared by direct chlorination of a benzaldehyde phenylhydrazone. Methods of using the new compounds and new anthelmintic formulations are described. The new compound p-toluoyl chloride phenylhydrazone is effective against worms at rates at least as low as 100 mg./kg. of body weight in sheep.
[3 + 2]-Cycloaddition of <i>in Situ</i> Generated Nitrile Imines and Acetylene for Assembling of 1,3-Disubstituted Pyrazoles with Quantitative Deuterium Labeling
作者:Vladimir V. Voronin、Maria S. Ledovskaya、Evgeniy G. Gordeev、Konstantin S. Rodygin、Valentine P. Ananikov
DOI:10.1021/acs.joc.8b00155
日期:2018.4.6
methodology for the preparation of 1,3-disubstituted pyrazoles from in situ generated nitrile imines and acetylene is reported. The reactions are performed in a simple two-chamber reactor. One part of the reactor is loaded with hydrazonoyl chloride precursors of active nitrile imine species and a base. The other part is used to generate acetylenefrom CaC2 and water. Partitioning of the reactants improves
A formal [3+2] cycloaddition reaction of <i>N</i>-methylimidazole as a masked hydrogen cyanide: access to 1,3-disubstitued-1<i>H</i>-1,2,4-triazoles
作者:Issa Yavari、Omid Khaledian
DOI:10.1039/d0cc01065k
日期:——
N-Methylimidazole (NMI) can act as a masked HCN in the synthesis of 1,3-disubstitued-1H-1,2,4-triazoles via a formal cycloaddition reaction of hydrazonoyl chloride with NMI. The product was proved to be formed via an initial nucleophilic substitution of hydrazonoyl chloride with NMI following cyclization and two sequential C–N bond cleavages.
N-甲基咪唑(NMI)可通过1,酰氯与NMI的正式环加成反应在合成1,3-二取代-1 H -1,2,4-三唑中充当掩蔽的HCN 。事实证明,该产物是通过环化反应和两次连续的C–N键裂解后,用NMI进行酰肼基氯的初始亲核取代而形成的。
Method of use, composition, and compounds
申请人:The Upjohn Company
公开号:US04017540A1
公开(公告)日:1977-04-12
Certain benzoyl chloride phenylhydrazones have been found to be active against insects and mites. The benzoyl ring and the phenylhydrazone ring can be substituted with a halogen atom, a nitro group, or an alkyl group of from 1 to 6 carbon atoms, inclusive. A new class of pentahalobenzoyl chloride phenylhydrazones is described, particularly pentafluorobenzoyl chloride phenylhydrazones. A further new class of alkylbenzoyl chloride phenylhydrazones, particularly p-toluoyl chloride phenylhydrazones are also described. The compounds are prepared by reacting a benzoic acid phenylhydrazide with phosphorus pentachloride to obtain a benzoyl chloride (dichlorophosphinyl)phenylhydrazone that is reacted with phenol to produce the desired benzoyl chloride phenylhydrazones. Certain of the compounds can be prepared by direct chlorination of a benzaldehyde phenylhydrazone. Methods of use and compositions are described.