Cyclization of 5-amino-1-aryl-1H-pyrazole-4-carbonitriles with β-dicarbonyl compounds
作者:Andrei Yu. Potapov、Dmitriy Yu. Vandyshev、Yevgeniya A. Kosheleva、Vladimir A. Polikarchuk、Mikhail A. Potapov、Khidmet S. Shikhaliev
DOI:10.1007/s10593-017-2041-9
日期:2017.2
for the preparation of new pyrazolo[3,4-b]pyridines and tetrahydropyrazolo[3,4-b]quinolinones by the reactions of 5-amino-1-aryl-1H-pyrazole-4-carbonitriles with aliphatic and cyclic 1,3-dicarbonyl compounds in the presence of anhydrous tin(IV) chloride.
已经开发了一种通过5-氨基-1-芳基-1 H-吡唑-4-腈与苯甲酸酯反应制备吡唑并[3,4- b ]吡啶和四氢吡唑并[3,4 - b ]喹啉酮的方法。在无水氯化锡(IV)存在下的脂族和环状1,3-二羰基化合物。
Cyclohexane-1,3-Diones for Use in the Treatment of Amyotrophic Lateral Sclerosis
申请人:Kirsch Donald R.
公开号:US20120264765A1
公开(公告)日:2012-10-18
The present invention relates to the identification of provided cyclohexane-1,3-diones (CHD compounds) and pharmaceutical compositions thereof for treating subjects with amyotrophic lateral sclerosis (ALS) and other neurodegenerative diseases. The invention also provides methods of preparing the provided CHD compounds.
rylimidazoles with iodonium ylides leading to substituted tetracyclic and pentacyclic bridgehead N-heterocycles, wherein iodonium ylide acts as a carbene precursor. For the first time, iodonium ylide proceeds through a Ru–carbenoid intermediate. Further, the synthetic utility of this protocol was successfully shown for gram-scale synthesis and useful synthetic transformations.
Copper-catalyzed one-pot [3 + 2] cycloadditions of ethynyl indoloxazolidones with 1,3-cyclohexanediones
作者:Qing-Qiang Su、Ruo-Nan Wang、Yong-Zheng Lv、Ya-Xin Fan、Shan Li、Hong-Li Huang、Ji-Yuan Du
DOI:10.1039/d3ob00332a
日期:——
units in natural products and medicinal molecules, and methods for their introduction are of fundamental importance. Here we report one-pot cycloadditions of ethynyl indoloxazolidones with 1,3-cyclohexanediones enabled by copper catalysis, leading to a series of functionalized furan derivatives in good yields. This method features mild reaction conditions, high efficiency, and wide substrate scope
Synthesis of Oxaspirocyclohexadienones via Lewis‐Acid Catalyzed [2+3]‐Annulations of p‐Quinone Methides and Iodonium Ylides
作者:Mohd. Mujahid、Sanjeev Kumar、Nitin Pal Kalia、Vinaykumar Kanchupalli
DOI:10.1002/adsc.202400323
日期:2024.8.6
Abstract: Herein, we report a mild and significant method for the synthesis of oxaspirocyclohexadienones by using a combination of Lewis acid-HFIP mediated [2+3]-annulation of p-quinone methides (p-QMs) and iodonium ylides. The proposed mechanism proceeds through a one-pot sequence of carbonyl activation/cyclopropyl formation/Cloke-Wilson rearrangement to provide a broad range of oxaspirocyclohexadienones