- Compound containing 2,4 - thiazole ring and preparation method and application thereof
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The invention provides a compound containing 2,4 - thiazole rings and a preparation method and application thereof, wherein the compound is shown in a formula X. A Is pyrazolopyrimidine or indole. Z Is carbonless. X Is O or S. Y Is - O - or - NH . R1 Hydrogen or C1 -6 Alkyl. R2 Be selected from C1 - C3 Alkyl. C5 - C15 Alkenyl, alkynyl, 5 - RMB 10 heterocyclic radicals, C6 - C12 Aryl, 5 -12 membered heteroaryl, sterol and 5-10 元 cycloalkyl. Y And R2 Connection, or Y and R2 Looping. R3 From hydrogen. Halogen, amino, hydroxyl, acetyl, 3 - RMB 10 heterocyclic group, C6 - C12 Aryl, 5 -12-membered heteroaryl, 3 -10-membered cycloalkyl, ester, carboxy, trihalomethyl and adamantyl. R2 Or R3 It is unsubstituted or is selected from C. 1 - C6 Alkyl. A hydroxy group, a halogen group, a trihalomethyl group, a carboxyl group, and a phenyl group. R2 Document C1 - C3 Alkyl, R3 Hydrogen.
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Paragraph 0189; 0190; 0192
(2021/08/25)
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- Optimization, Structure-Activity Relationship, and Mode of Action of Nortopsentin Analogues Containing Thiazole and Oxazole Moieties
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Plant diseases seriously endanger plant health, and it is very difficult to control them. A series of nortopsentin analogues were designed, synthesized, and evaluated for their antiviral activities and fungicidal activities. Most of these compounds displayed higher antiviral activities than ribavirin. Compounds 1d, 1e, and 12a, with excellent antiviral activities, emerged as novel antiviral lead compounds, among which 1e was selected for further antiviral mechanism research. The mechanism research results indicated that these compounds may play an antiviral role by aggregating viral particles to prevent their movement in plants. Further fungicidal activity tests revealed that nortopsentin analogues displayed broad-spectrum fungicidal activities. Compounds 2p and 2f displayed higher antifungal activities against Alternaria solani than the commercial fungicides carbendazim and chlorothalonil. Current research has laid a foundation for the application of nortopsentin analogues in plant protection.
- Guo, Jincheng,Hao, Yanan,Ji, Xiaofei,Wang, Ziwen,Liu, Yuxiu,Ma, Dejun,Li, Yongqiang,Pang, Huailin,Ni, Jueping,Wang, Qingmin
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p. 10018 - 10031
(2019/10/05)
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- INDOLE AHR INHIBITORS AND USES THEREOF
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The present invention provides compounds useful as inhibitors of AHR, compositions thereof, and methods of using the same.
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Paragraph 00826; 00828
(2018/11/22)
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- Three-Component Coupling-Oxidative Amidation-Heterocycloannulation: Synthesis of the Indole Alkaloids Hamacanthin A and trans -2,5-Bis(3′-Indolyl)piperazine
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Concise and highly convergent syntheses of antifungal marine bis(indole) alkaloids, hamacanthin A and trans-2,5-bis(3′-indolyl)piperazine is described. The total synthesis of hamacanthin A is accomplished via the oxidative amidation-chemoselective heterocycloannulation of 2,2-dibromo-1-(1H-indol-3-yl)ethanone with 1-(1H-indol-3-yl)ethane-1,2-diamine. The reduction of desbromo hamacanthin with aluminum borohydride afforded the alkaloid trans-2,5-bis(3′-indolyl)piperazine. Two novel and convenient protocols for the synthesis of indolyl-1,2-diaminoethane are also developed in moderate to good yields.
- Srinivasan, A. Kaliyaperumal,Banerjee, Shyamapada,Pachore, Sharad S.,Syam Kumar
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p. 1057 - 1064
(2017/05/19)
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- Copper(II)-Mediated Aerobic Oxidation of Benzylimidates: Synthesis of Primary α-Ketoamides
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A simple and straightforward method for the synthesis of primary α-ketoamides has been discovered. The reaction represents the first example of benzylimidates directly converting to primary α-ketoamides by using sustainable molecular oxygen as an oxidant. This reaction proceeds in the presence of copper(II) salt via cleavage of benzylic C-H and C-O bonds of the benzylimidates with liberation of alcohols as the only byproduct. A wide substrate scope, operationally mild conditions, the use of single substrates, and a reaction scaled up to grams make this strategy very attractive and practical. Furthermore, mechanistic studies illustrate that the imidate group adjacent to the benzylic position plays crucial role in facilitating this chemical process.
- Kumar, Yogesh,Shaw, Mukta,Thakur, Rima,Kumar, Amit
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p. 6617 - 6625
(2016/08/16)
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- EFFICIENT AND SCALABLE SYSTHESIS OF 2-(1'H-INDOLE-3'-CARBONYL)-THIAZOLE-4-CARBOXYLIC ACID METHYL ESTER AND ITS STRUCTURAL ANALOGS
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Methods of synthesizing 2-(1'H-indole-3'-carbonyl)-thiazole-4-carboxylic acid methyl ester (ITE) and structural analogs thereof. The methods include condensation reactions or condensation and oxidation reactions to form the thiazoline or thiazole moiety of ITE or its structural analogs.
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Page/Page column 20
(2016/06/01)
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- A new synthesis of versatile indolyl-3-carbonylnitriles
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Abstract Indolyl-3-carbonylnitriles are compounds with demonstrated utility as intermediates in organic chemistry. However, their synthesis remains a challenge, requiring the use of toxic sources of cyanide, and often proceeding in low yields. Accordingly, presented here is a new synthesis of these versatile reactants, via dehydration of easily accessible α-oxoacetamides in generally high yields under simple reaction conditions.
- Veale, Clinton G.L.
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p. 5287 - 5290
(2015/08/26)
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- Formamidine hydrochloride as an amino surrogate: I2-catalyzed oxidative amidation of aryl methyl ketones leading to free (N-H) α-ketoamides
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A highly efficient molecular iodine catalyzed oxidative amidation of aryl methyl ketones with formamidine hydrochloride has been developed. This reaction represents a novel strategy for the synthesis of free (N-H) α-ketoamides. Based on the experimental r
- Liu, Shan,Gao, Qinghe,Wu, Xia,Zhang, Jingjing,Ding, Kerong,Wu, Anxin
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supporting information
p. 2239 - 2242
(2015/03/04)
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- Strictosidine synthase: Mechanism of a Pictet-Spengler catalyzing enzyme
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The Pictet-Spengler reaction, which yields either a β-carboline or a tetrahydroquinoline product from an aromatic amine and an aldehyde, is widely utilized in plant alkaloid biosynthesis. Here we deconvolute the role that the biosynthetic enzyme strictosidine synthase plays in catalyzing the stereoselective synthesis of a β-carboline product. Notably, the rate-controlling step of the enzyme mechanism, as identified by the appearance of a primary kinetic isotope effect (KIE), is the rearomatization of a positively charged intermediate. The KIE of a nonenzymatic Pictet-Spengler reaction indicates that rearomatization is also rate-controlling in solution, suggesting that the enzyme does not significantly change the mechanism of the reaction. Additionally, the pH dependence of the solution and enzymatic reactions provides evidence for a sequence of acid-base catalysis steps that catalyze the Pictet-Spengler reaction. An additional acid-catalyzed step, most likely protonation of a carbinolamine intermediate, is also significantly rate controlling. We propose that this step is efficiently catalyzed by the enzyme. Structural analysis of a bisubstrate inhibitor bound to the enzyme suggests that the active site is exquisitely tuned to correctly orient the iminium intermediate for productive cyclization to form the diastereoselective product. Furthermore, ab initio calculations suggest the structures of possible productive transition states involved in the mechanism. Importantly, these calculations suggest that a spiroindolenine intermediate, often invoked in the Pictet-Spengler mechanism, does not occur. A detailed mechanism for enzymatic catalysis of the β-carboline product is proposed from these data.
- Maresh, Justin J.,Giddings, Lesley-Ann,Friedrich, Anne,Loris, Elke A.,Panjikar, Santosh,Trout, Bernhardt L.,Stoeckigt, Joachim,Peters, Baron,O'Connor, Sarah E.
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p. 710 - 723
(2008/09/20)
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- Synthesis of deuterium labeled tryptamine derivatives
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The synthesis of deuterium labeled tryptamine derivatives, [2-(1H-indol-3-yl)-[2H4]-ethyl]-dimethylamine (DMT), [2H10]-diethyl-[2-(1H-indol-3-yl)-ethyl]-amine (DET), [2-(1H-indol-3-yl)-ethyl]-[2H6]-dipropyl-amine (DPT) and [2H2]-alpha-methyltryptamine (AMT) is described. The isotopically labeled compounds are used as internal standards in gas chromatography-mass spectrometry (GC-MS) assays.
- Wang, Yu-Yun,Chen, Chinpiao
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p. 1363 - 1368
(2008/02/13)
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- Enantioselective Total Syntheses of (+)-Arborescidine A, (-)-Arborescidine B, and (-)-Arborescidine C
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Described are the first enantioselective total syntheses of (+)-arborescidine A ((+)-1), (-)-arborescidine B ((-)-2), and (-)-arborescidine C ((-)-3), via routes that proceeded in five steps and 50% overall yield, eight steps and 61% overall yield, and ni
- Santos, Leonardo S.,Pilli, Ronaldo A.,Rawal, Viresh H.
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p. 1283 - 1289
(2007/10/03)
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- A versatile linkage strategy for solid-phase synthesis of N,N-dimethyltryptamines and β-carbolines
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(matrix presented) Various tryptamines are captured by a vinylsulfonylmethyl polystyrene resin, generating a safety-catch linkage. β-Carbolines can be formed from 4 by a Pictet-Spengler reaction with the introduction of R1. Tryptamine 4 can also be derivatized by acylation or copper-mediated coupling to introduce R2. If X = Br, Suzuki coupling can be used to introduce R3. After derivatization, the indole derivatives are activated with methyl iodide and released under mild basic condition.
- Wu, Tom Y. H.,Schulte, Peter G.
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p. 4033 - 4035
(2007/10/03)
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- The first total synthesis of dragmacidin D
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The first total synthesis of the biologically significant bis-indole alkaloid dragmacidin D (5) has been achieved. Thermal and electronic modulation provides the key for a series of palladium-catalyzed Suzuki cross-coupling reactions that furnished the core structure of the complex guanidine- and aminoimidazole-containing dragmacidins. Following this crucial sequence, a succession of meticulously controlled final events was developed leading to the completion of the natural product.
- Garg, Neil K.,Sarpong, Richmond,Stoltz, Brian M.
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p. 13179 - 13184
(2007/10/03)
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