461-34-7Relevant academic research and scientific papers
Method for preparing fluoroalkane substituted compound by reducing halogenated fluoroalkane and olefin through metal elementary substance
-
Paragraph 0061-0069; 0407-0415, (2021/07/17)
The invention discloses a method for preparing a fluoroalkane substituted compound, which comprises the steps of taking a compound containing carbon-carbon double bonds and halogenated fluoroalkane as raw materials, taking a metal elementary substance as a reducing agent, taking a substance containing active protons as a hydrogen source, and carrying out an addition reaction to prepare a compound which is simultaneously substituted by hydrogen and fluoroalkyl, thereby obtaining the fluoroalkane substituted compound. According to the method, the metal elementary substance is used as the reducing agent for the first time, the compound containing active hydrogen is used as the hydrogen source, one hydrogen atom and one fluoroalkyl group are introduced to the two ends of olefin respectively, only one-step reaction is needed, the reaction process conditions are mild, the reaction raw materials are cheap and easy to obtain, the cost is low, and all reaction reagents are green and environmentally friendly; and the reaction substrate has strong applicability, can participate in the reaction as long as carbon-carbon double bonds exist in the structure, and is not influenced by the types of substituent groups on carbon atoms of the double bonds, and the yield of the product is good.
Batch Versus Flow Lithiation–Substitution of 1,3,4-Oxadiazoles: Exploitation of Unstable Intermediates Using Flow Chemistry
Wong, Jeff Y. F.,Tobin, John M.,Vilela, Filipe,Barker, Graeme
supporting information, p. 12439 - 12445 (2019/09/06)
1,3,4-Oxadiazoles are a common motif in pharmaceutical chemistry, but few convenient methods for their modification exist. A fast, convenient, high yielding and general α-substitution of 1,3,4-oxadiazoles has been developed using a metalation-electrophilic trapping protocol both in batch and under continuous flow conditions in contradiction to previous reports which suggest that α-metalation of this ring system results in ring fragmentation. In batch, lithiation is accomplished at an industrially convenient temperature, ?30 °C, with subsequent trapping giving isolated yields of up to 91 %. Under continuous flow conditions, metalation is carried out at room temperature, and subsequent in flow electrophilic trapping gave up to quantitative isolated yields. Notably, lithiation in batch at room temperature results only in ring fragmentation and we propose that the superior mixing in flow allows interception and exploitation of an unstable intermediate before decomposition can occur.
FUSED HETEROCYCLIC COMPOUND AND APPLICATION THEREOF
-
Paragraph 0639; 0640, (2013/06/04)
The present invention provides a compound useful for the prophylaxis or treatment of eicosanoid-associated diseases such as atherosclerosis, atherothrombosis, diabetes, obesity, asthma, fever, pain, cancer, rheumatism, osteoarthritis, atopic dermatitis and the like, and having superior pharmacological action, physicochemical properties and the like. The present invention relates to a compound represented by the following formula: wherein each symbol is as defined in the specification, or a salt thereof.
Inhibitors of phenylethanolamine N-methyltransferase that are predicted to penetrate the blood-brain barrier: Design, synthesis, and evaluation of 3-fluoromethyl-7-(N-substituted aminosulfonyl)-1,2,3,4-tetrahydroisoquinolines that possess low affinity toward the α2-adrenoceptor
Romero, F. Anthony,Vodonick, Steven M.,Criscione, Kevin R.,McLeish, Michael J.,Grunewald, Gary L.
, p. 4483 - 4493 (2007/10/03)
(±)-7-Aminosulfonyl-3-fluoromethyl-1,2,3,4-tetrahydroisoquinoline (7) is one of the most potent and selective inhibitors of phenylethanolamine N-methyltransferase (PNMT) reported to date, but a blood-brain barrier (BBB) model indicates that it cannot penetrate the BBB. To increase the lipophilicity of 7 by addition of a nonpolar substituent to the sulfonamide nitrogen, a small library of (±)-3-fluoromethyl-7-(N-substituted aminosulfonyl)-1,2,3,4- tetrahydroisoquinolines was synthesized and evaluated as inhibitors of PNMT and for affinity at the α2-adrenoceptor. In addition, this library probed the PNMT active site surrounding the sulfonamide nitrogen of 7. Bulky substituents on the sulfonamide nitrogen are disfavored at the PNMT active site more so than at the α2-adrenoceptor (thus reducing selectivity). On the other hand, alkyl chains on the sulfonamide nitrogen that contain an electron dense atom, such as a fluorine, are favored in the PNMT active site and possess little α2-adrenoceptor affinity, thereby conferring good selectivity (>500). Several members of the library (8, 14, 17, and 18) have excellent PNMT inhibitory potency and selectivity and are predicted, on the basis of their ClogP value (>0.5), to penetrate the BBB to a significant extent. Compounds 17 and 18 are the most potent and selective PNMT inhibitors reported to date.
Synthesis, Structure-Activity Relationships, and Pharmacological Evaluation of a Series of Fluorinated 3-Benzyl-5-indolecarboxamides: Identification of 4--1-methylindol-3-yl>methyl>-3-methoxy-N-benzamide, ...
Jacobs, Robert T.,Bernstein, Peter R.,Cronk, Laura A.,Vacek, Edward P.,Newcomb, Lisa F.,et al.
, p. 1282 - 1297 (2007/10/02)
The continued exploration of a series of 3-(arylmethyl)-1H-indole-5-carboxamides by the introduction of fluorinated amide substituents has resulted in the discovery of 4--1-methylindol-3-yl>methyl>-3-methoxy-N-benzamide (38p, ZENECA ZD 3523), which has been chosen for clinical evaluation.This compound exhibited a Ki of 0.42 nM for displacement of LTD4 on guinea pig lung membranes, a pKB of 10.13 +/- 0.14 versus LTE4 on guinea pig trachea, and an oral ED50 of 1.14 μmol/kg opposite LTD4-induced bronchoconstriction in guinea pigs.The R enantiomer was found to be modestly more potent than the S enantiomer 38o.Modification of the amide substituent to afford achiral compounds was unsuccessful in achieving comparable levels of activity.Profiling of 38p opposite a variety of functional assays has demonstrated the selectivity of this compound as a leukotriene receptor antagonist.The enantioselective synthesis of 38p, which employed a diastereoselective alkylation of (4R,5S)-3-(1-oxo-4,4,4-trifluorobutyl)-4-methyl-5-phenyl-2-oxazolidinone (27) as the key step to establish the chirality of the amide substituent, provided an efficient route for generating 38p in >99percent enantiomeric purity.
