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].
Photoinduced remote regioselective radical alkynylation of unactivated C-H bonds
Hu, Qu-Ping,Liu, Yong-Ze,Liu, Yu-Tao,Pan, Fei
, p. 2295 - 2298 (2022/02/25)
A method for the remote regioselective alkynylation of unactivated C(sp3)-H bonds in diverse aliphatic amides by photogenerated amidyl radicals has been developed. The site-selectivity is dominated via a 1,5-hydrogen atom transfer (HAT) process of the amide. Mild reaction conditions and high regioselectivity are demonstrated in this methodology.
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.
NURR1 RECEPTOR MODULATORS
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, (2020/09/08)
Described herein, inter alia, are Nurr1 receptor modulators and uses thereof. In an aspect is provided a method for treating a disease associated with dysregulation and/or degeneration of dopaminergic neurons in the central nervous system of a subject in need thereof, the method including administering to the subject in need thereof a therapeutically effective amount of a compound described herein.
Photoredox-Catalyzed Site-Selective α-C(sp3)?H Alkylation of Primary Amine Derivatives
Ashley, Melissa A.,Yamauchi, Chiaki,Chu, John C. K.,Otsuka, Shinya,Yorimitsu, Hideki,Rovis, Tomislav
supporting information, p. 4002 - 4006 (2019/02/24)
The synthetic utility of tertiary amines to oxidatively generate α-amino radicals is well established, however, primary amines remain challenging because of competitive side reactions. This report describes the site-selective α-functionalization of primary amine derivatives through the generation of α-amino radical intermediates. Employing visible-light photoredox catalysis, primary sulfonamides are coupled with electron-deficient alkenes to efficiently and mildly construct C?C bonds. Interestingly, a divergence between intermolecular hydrogen-atom transfer (HAT) catalysis and intramolecular [1,5] HAT was observed through precise manipulation of the protecting group. This dichotomy was leveraged to achieve excellent α/δ site-selectivity.
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.
Conversion of alcohols to enantiopure amines through dual-enzyme hydrogen-borrowing cascades
Mutti, Francesco G.,Knaus, Tanja,Scrutton, Nigel S.,Breuer, Michael,Turner, Nicholas J.
, p. 1525 - 1529 (2015/10/05)
α-Chiral amines are key intermediates for the synthesis of a plethora of chemical compounds at industrial scale. We present a biocatalytic hydrogen-borrowing amination of primary and secondary alcohols that allows for the efficient and environmentally benign production of enantiopure amines. The method relies on a combination of two enzymes: an alcohol dehydrogenase (from Aromatoleum sp., Lactobacillus sp., or Bacillus sp.) operating in tandem with an amine dehydrogenase (engineered from Bacillus sp.) to aminate a structurally diverse range of aromatic and aliphatic alcohols, yielding up to 96% conversion and 99% enantiomeric excess. Primary alcohols were aminated with high conversion (up to 99%). This redox self-sufficient cascade possesses high atom efficiency, sourcing nitrogen from ammonium and generating water as the sole by-product.
Bicyclization of aza-compounds by positive halide ions. II. Lactams and some related cyclizations
Elofson, Richard M.,Gadallah, Fahmi F.,Laidler, James K.
, p. 2770 - 2773 (2007/10/02)
Anodic oxidation of lactams in the presence of halide ions produced excellent yields of bicyclic compounds with reactants having rings in the range of eight to ten atoms (C7 to C9).Smaller rings did not react to form bicyclic products and larger rings gave reduced yields.Attempts were made to cyclize non-cyclic amides and to bicyclize cycloheptyl and cyclooctyl acetamide with limited success.