21900-48-1Relevant academic research and scientific papers
Lead derivatization of ethyl 6-bromo-2-((dimethylamino)methyl)-5-hydroxy-1-phenyl-1H-indole-3-carboxylate and 5-bromo-2-(thiophene-2-carboxamido) benzoic acid as FabG inhibitors targeting ESKAPE pathogens
Varakala, Saiprasad Dasugari,Reshma, Rudraraju Srilakshmi,Schnell, Robert,Dharmarajan, Sriram
, (2021/11/26)
Our previous studies on FabG have identified two compounds 5-bromo-2-(thiophene-2-carboxamido) benzoic acid (A) and ethyl 6-bromo-2-((dimethylamino)methyl)-5-hydroxy-1-phenyl-1H-indole-3-carboxylate(B) as best hits with allosteric mode of inhibition. FabG is an integral part of bacterial fatty acid biosynthetic system FAS II shown to be an essential gene in most ESKAPE Pathogens. The current work is focussed on lead expansion of these two hit molecules which ended up with forty-three analogues (twenty-nine analogues from lead compound A and fourteen compounds from lead compound B). The enzyme inhibition studies revealed that compound 15 (effective against EcFabG, AbFabG, StFabG, MtFabG1) and 19 (inhibiting EcFabG and StFabG) had potency of broad-spectrum inhibition on FabG panel.
Facile Synthesis of Alkylidene Phthalides by Rhodium-Catalyzed Domino C?H Acylation/Annulation of Benzamides with Aliphatic Carboxylic Acids
Liu, Sien,He, Bangyue,Li, Hongyi,Zhang, Xiaofeng,Shang, Yaping,Su, Weiping
supporting information, p. 15628 - 15633 (2021/10/05)
The Rh-catalyzed ortho-C(sp2)?H functionalization of 8-aminoquinoline-derived benzamides with aliphatic acyl fluorides generated in situ from the corresponding acids has been developed. This reaction initiated with 8-aminoquinoline-directed ortho-C(sp2)?H acylation, which was accompanied by subsequent intramolecular nucleophilic acyl substitution of amide group to produce alkylidene phthalides This approach exhibits high stereo-selectivity for Z-isomer products, and tolerates a variety of functional groups as well as aliphatic carboxylic acids with diverse structural scaffolds.
Improved synthesis of sterically encumbered heteroaromatic biaryls from aromatic β-keto esters
Rosen, Brandon R.,Ul Sharif, Ehesan,Miles, Dillon H.,Chan, Nicholas S.,Leleti, Manmohan R.,Powers, Jay P.
supporting information, (2020/03/25)
A protocol for the synthesis of hindered 4-aryl 2-aminopyrimidines from β–keto esters is described. The process employs trifluoroethanol as an essential additive to promote the guanidine condensation reaction, enabling the synthesis of 25 aryl- and heteroaryl substituted aminopyrimidines in good yields and high purities with no column chromatography. The conditions described herein are readily scalable and have been employed in the large-scale synthesis of the clinical A2a/A2bR antagonist AB928.
Macrofilaricidal Benzimidazole-Benzoxaborole Hybrids as an Approach to the Treatment of River Blindness: Part 2. Ketone Linked Analogs
Carter, David S.,Jacobs, Robert T.,Freund, Yvonne R.,Berry, Pamela W.,Akama, Tsutomu,Easom, Eric E.,Lunde, Christopher S.,Rock, Fernando,Stefanakis, Rianna,Mckerrow, James,Fischer, Chelsea,Bulman, Christina A.,Lim, Kee Chong,Suzuki, Brian M.,Tricoche, Nancy,Sakanari, Judy A.,Lustigman, Sara,Plattner, Jacob J.
, p. 180 - 185 (2020/02/13)
The optimization of a series of benzimidazole-benzoxaborole hybrid molecules linked via a ketone that exhibit good activity against Onchocerca volvulus, a filarial nematode responsible for the disease onchocerciasis, also known as river blindness, is desc
Development of a Scalable and Practical Synthesis of AB928, a Dual A2a/A2bReceptor Antagonist
Debien, Laurent P. P.,Jeffrey, Jenna L.,Leleti, Manmohan R.,Miles, Dillon H.,Powers, Jay P.,Rosen, Brandon R.,Sharif, Ehesan U.
, p. 1254 - 1261 (2020/08/14)
AB928 is a potent and selective dual antagonist of the A2a and A2b receptors, which is currently in clinical trials. Here, we report the development of two scalable and practical syntheses of AB928. The first-generation synthesis was used to successfully
PROCESSES FOR PREPARING AMINOPYRIMIDINE COMPOUNDS
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Paragraph 0079, (2020/12/29)
Provided herein are improved processes for preparing aminopyrimidine compounds of Formula (I). The disclosed processes advantageously proceed through a β-diketoester intermediate of Formula (A) and avoid the direct linking of a pyrimidine and phenyl moiet
N-Heterocyclic Carbene Catalyzed Photoenolization/Diels–Alder Reaction of Acid Fluorides
Agrawal, Arush,G?tze, Jan P.,Golz, Paul,Hopkinson, Matthew N.,Mavroskoufis, Andreas,Rajes, Keerthana,Ru?, Vincent
supporting information, p. 3190 - 3194 (2020/01/24)
The combination of light activation and N-heterocyclic carbene (NHC) organocatalysis has enabled the use of acid fluorides as substrates in a UVA-light-mediated photochemical transformation previously observed only with aromatic aldehydes and ketones. Stoichiometric studies and TD-DFT calculations support a mechanism involving the photoactivation of an ortho-toluoyl azolium intermediate, which exhibits “ketone-like” photochemical reactivity under UVA irradiation. Using this photo-NHC catalysis approach, a novel photoenolization/Diels–Alder (PEDA) process was developed that leads to diverse isochroman-1-one derivatives.
Rhodium-Catalyzed Alkylation of C?H Bonds in Aromatic Amides with Non-activated 1-Alkenes: The Possible Generation of Carbene Intermediates from Alkenes
Yamaguchi, Takuma,Natsui, Satoko,Shibata, Kaname,Yamazaki, Ken,Rej, Supriya,Ano, Yusuke,Chatani, Naoto
supporting information, p. 6915 - 6919 (2019/05/10)
The alkylation of C?H bonds (hydroarylation) in aromatic amides with non-activated 1-alkenes using a rhodium catalyst and assisted by an 8-aminoquinoline directing group is reported. The addition of a carboxylic acid is crucial for the success of this reaction. The results of deuterium-labeling experiments indicate that one of deuterium atoms in the alkene is missing, suggesting that the reaction does not proceed through the commonly accepted mechanism for C?H alkylation reactions. Instead the reaction is proposed to proceed through a carbene mechanism. The carbene mechanism is also supported by preliminary DFT calculations.
Cobalt-Catalyzed C-H Iodination of Aromatic Amides with Molecular Iodine through the Use of a 2-Aminophenyloxazoline-Based Bidentate-Chelation System
Kommagalla, Yadagiri,Chatani, Naoto
supporting information, p. 5971 - 5976 (2019/08/26)
The cobalt-catalyzed chelation-assisted C-H iodination of aromatic amides using molecular iodine as an iodinating reagent is reported. The reaction is carried out in an atmosphere of air and uses Co(OAc)2·4H2O as an efficient catalys
Rhodium-Catalyzed Alkenylation of C-H Bonds in Aromatic Amides with Alkynes
Shibata, Kaname,Natsui, Satoko,Chatani, Naoto
supporting information, p. 2234 - 2237 (2017/05/12)
The rhodium-catalyzed alkenylation of C-H bonds of aromatic amides with alkynes is reported. A variety of functional groups, including OMe, OAc, Br, Cl, and even NO2, are applicable to this reaction to give the corresponding hydroarylation prod
