5344-20-7Relevant articles and documents
Two new insecticidal amides and a new alcoholic amide from Piper nigrum LINN
Siddiqui, Bina S.,Gulzar, Tahsin,Begum, Sabira,Rasheed, Munawwer,Sattar, Fouzia A.,Afshan, Farhana
, p. 2760 - 2767 (2003)
Three new amides, pipgulzarine (1), pipzorine (2), and piptahsine (3), have been isolated from the dried seeds of Piper nigrum LINN. along with nine known constituents: (2E,4E,8Z)-N-(isobutyl)eicosatrienamide, pellitorine, pipercide, piperine, stigmastanol, stigmasterol, decurrenal, stigmasterol 3-O-β-D-glucopyranoside, and 5,10(15)-cadinen-4-ol. The structures of the new constituents have been established as (2E,11E)-12(benzo[1,3]dioxol-5-yl)-N-(2-methylpropyl)dodeca-2,11-dienamide (1), (2E,12Z)-N-(4-methylpentyl)octadeca-2,12-dienamide (2), and (2E,4S)-4-hydroxy-N-(2-methylpropyl)hex-2-enamide (3). The structures of 1-3 were derived by spectral studies and chemical reactions, and by comparison of spectral data in the case of known constituents. Compounds 1 and 2, and most of the already known compounds, exhibited toxicity against fourth instar larvae of Aedes aegypti Liston. The isolated (Z) double bond in 2 was assigned on the basis of its EI-MS fragmentation pattern and its reaction with OsO4. The (S) configuration at C(4) of 3 was determined by Horeau's method. This is the first report of the isolation of a 4-methylpentylamide from P nigrum, while shorter branched amides have been reported from this genus [1].
Remote Regioselective Radical C-H Functionalization of Unactivated C-H Bonds in Amides: The Synthesis of gem-Difluoroalkenes
Hu, Qu-Ping,Cheng, Jing,Wang, Ying,Shi, Jie,Wang, Bi-Qin,Hu, Ping,Zhao, Ke-Qing,Pan, Fei
, p. 4457 - 4462 (2021/05/26)
The site-selective functionalization of unactivated aliphatic amines is an attractive and challenging synthetic approach. We herein report a general strategy for the remote site-selective functionalization of unactivated C(sp3)-H bonds in amides by photogenerated amidyl radicals to form gem-difluoroalkenes with trifluoromethyl-substituted alkenes. The site selectivity is controlled by a 1,5-hydrogen atom transfer (HAT) process of the amide. This photocatalyzed transformation shows both chemo- and site-selectivity, facilitating the formation of a secondary, tertiary, or quaternary carbon center.
2-substituted parazoleamino-4-substituted amino-5-pyrimidine formamide compound, composition and application thereof
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Paragraph 0118-0120, (2019/04/10)
The invention relates to a series of new compounds as a JAK inhibitor, as well as compositions and applications thereof, and particularly provides a series of compounds (I) that have a strong JAK inhibiting activity, or stereisomers, geometrical isomers, tautomers, pharmaceutically acceptable salts, prodrugs, metabolites, isotope derivatives, and solvates, as well as medicine compositions comprising such compounds. The invention also discloses applications of the compounds or the medicine compositions in preparation of a medicine, which is used for treatment of autoimmune diseases or cancer.