Month: October 2022

Kazmi, M. Zain H.; Rygus, Jason P. G.; Ang, Hwee Ting; Paladino, Marco; Johnson, Matthew A.; Ferguson, Michael J.; Hall, Dennis G. published the artcile< Lewis or Bronsted? A Rectification of the Acidic and Aromatic Nature of Boranol-Containing Naphthoid Heterocycles>, Category: isoquinoline, the main research area is aromatic nature Boranol Containing naphthoid heterocycles Lewis Bronsted.

Boron-containing heterocycles are important in a variety of applications from drug discovery to materials science; therefore a clear understanding of their structure and reactivity is desirable to optimize these functions. Although the boranol (B-OH) unit of boronic acids behaves as a Lewis acid to form a tetravalent trihydroxyborate conjugate base, it has been proposed that pseudoarom. hemiboronic acids may possess sufficient aromatic character to act as Bronsted acids and form a boron oxy conjugate base, thereby avoiding the disruption of ring aromaticity that would occur with a tetravalent boronate anion. Until now no firm evidence existed to ascertain the structure of the conjugate base and the aromatic character of the boron-containing ring of hemiboronic “”naphthoid”” isosteres. Here, these questions are addressed with a combination of exptl., spectroscopic, X-ray crystallog., and computational studies of a series of model benzoxazaborine and benzodiazaborine naphthoids. Although these hemiboronic heterocycles are unambiguously shown to behave as Lewis acids in aqueous solutions, boraza derivatives possess partial aromaticity provided their nitrogen lone electron pair is sufficiently available to participate in extended delocalization. As demonstrated by dynamic exchange and crossover experiments, these heterocycles are stable in neutral aqueous medium, and their measured pKa values are consistent with the ability of the endocyclic heteroatom substituent to stabilize a partial neg. charge in the conjugate base. Altogether, this study corrects previous inaccuracies and provides conclusions regarding the properties of these compounds that are important toward the methodical application of hemiboronic and other boron heterocycles in catalysis, bioconjugation, and medicinal chem.

Journal of the American Chemical Society published new progress about Aromaticity. 3336-49-0 belongs to class isoquinoline, and the molecular formula is C9H7NO, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Jiang, Xingjun; He, Jianbo; Chen, Hongli; Yang, Weiqing; Zhang, yuanyuan; Ma, Menglin published the artcile< Copper-catalyzed hydrolysis of bromoisoquinolines: preparation of hydroxyisoquinolines>, HPLC of Formula: 3336-49-0, the main research area is hydroxyisoquinoline preparation; bromoisoquinoline copper catalyst hydrolysis.

A complex phenomenon was observed in the process of preparing hydroxyisoquinoline through copper-catalyzed hydrolysis of bromoisoquinoline. The copper (II) complexes of hydroxyisoquinoline (L2Cu.5H2O) were characterized by high resolution mass spectra, thermogravimetric anal., IR, 1H NMR (NMR), and 2D-NMR. The Cu (II) complexes were mononuclear and coordinated with oxygen and nitrogen atom of two hydroxyisoquinoline and five water mols. in which a strong hydrogen bond was present. Two optimized methods were studied to prevent the formation of copper (II) complexes. The isoquinoline with 4, 5, 6, 7, and 8 hydroxyl substitutions were successfully prepared by copper-catalyzed hydrolysis of corresponding bromoisoquinoline and then workup by sodium sulfide or adjusted pH by dry ice or carbon dioxide gas.

Indian Journal of Heterocyclic Chemistry published new progress about Hydrolysis. 3336-49-0 belongs to class isoquinoline, and the molecular formula is C9H7NO, HPLC of Formula: 3336-49-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chopard, Claude; Bertho, Gildas; Prange, Thierry published the artcile< Naphthalene dioxygenase catalyzed cis-dihydroxylation of bicyclic aza arenes>, Related Products of 3336-49-0, the main research area is quinoline isoquinoline phthalazine naphthalene dioxygenase catalyst dihydroxylation biocatalyst enzyme; naphthyridine quinoxaline quinazoline cinnoline naphthalene dioxygenase catalyst dihydroxylation.

The scope of the biotransformation of a series of aza arene compounds by recombinant whole-cells of Escherichia coli JM109(DE3)(pDTG141) expressing the naphthalene dioxygenase system (NDOS) from Pseudomonas sp. NCIB 9616-4 was explored. The present study establishes that several bicyclic aza arenes are good substrates in the NDO-catalyzed reaction, giving cis-dihydrodiol derivatives Monohydroxylated products were also observed (quinolinemethanol, quinolinol, isoquinolinol, isoquinolinemethanol, phthalazinol, cinnolinol, quinazolinol).

RSC Advances published new progress about Aromatic alcohols Role: BPN (Biosynthetic Preparation), BIOL (Biological Study), PREP (Preparation) (aza arene alc. derivatives). 3336-49-0 belongs to class isoquinoline, and the molecular formula is C9H7NO, Related Products of 3336-49-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wu, Wei; Wang, Yan; Guo, Jing; Cai, Liu; Chen, Yuan; Huang, Yanmin; Peng, Yungui published the artcile< Asymmetric acyl-Mannich reaction of isoquinolines with α-(diazomethyl)phosphonate and diazoacetate catalyzed by chiral Bronsted acids>, SDS of cas: 90806-58-9, the main research area is diazo isoquinoline phosphonate acetate asym synthesis; isoquinoline enantioselective acyl Mannich diazomethyl phosphonate diazoacetate.

An efficient asym. acyl-Mannich reaction of isoquinolines with di-Et pyrocarbonate and α-(diazomethyl)phosphonate or diazoacetate has been developed using chiral spiro phosphoric acids as catalysts. This reaction allowed the construction of a series of chiral α-diazo-β-isoquinoline phosphonates and acetates I [R1 = H, 5-Cl, 7-MeO, 4-Ph, etc.; X = (MeO)2P(O), MeO2C, EtO2C, i-PrO2C, t-BuO2C] bearing a tertiary stereocenter at the C1 position with up to 98% yield and 99% ee.

Chemical Communications (Cambridge, United Kingdom) published new progress about Bronsted acids Role: CAT (Catalyst Use), USES (Uses). 90806-58-9 belongs to class isoquinoline, and the molecular formula is C10H9NO, SDS of cas: 90806-58-9.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zeng, Jia; Lytle, Anna K.; Gage, David; Johnson, Sean J.; Zhan, Jixun published the artcile< Specific chlorination of isoquinolines by a fungal flavin-dependent halogenase>, Category: isoquinoline, the main research area is halogenase Rdc1 Pochonia isoquinoline specific chlorination; chloroisoquinoline biosynthesis halogenase Rdc1 Pochonia.

Rdc2 of Pochonia chlamydosporia is the 1st flavin-dependent halogenase identified from fungi. Based on the reported structure of the bacterial halogenase CmlS, the authors built a homol. model for Rdc2. The model suggested an open substrate binding site that was capable of binding the natural substrate, monocillin II, and possibly other mols. such as 4-hydroxyisoquinoline (I) and 6-hydroxyisoquinoline (II). In vitro and in vivo halogenation experiments confirmed that I and II could be halogenated at the position ortho to the OH group, leading to the synthesis of the chlorinated isoquinolines, 3-chloro-4-hydroxyisoquinoline and 5-chloro-6-hydroxyisoquinoline, resp., which further expanded the spectrum of identified substrates of Rdc2. This work revealed that Rdc2 is a useful biocatalyst for the synthesis of various halogenated compounds

Bioorganic & Medicinal Chemistry Letters published new progress about Pochonia chlamydosporia. 3336-49-0 belongs to class isoquinoline, and the molecular formula is C9H7NO, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ruffoni, Alessandro; Julia, Fabio; Svejstrup, Thomas D.; McMillan, Alastair J.; Douglas, James J.; Leonori, Daniele published the artcile< Practical and regioselective amination of arenes using alkyl amines>, Recommanded Product: 5-Methoxyisoquinoline, the main research area is aromatic amine photoredox synthesis regioselective amination arene alkylamine.

The formation of carbon-nitrogen bonds for the preparation of aromatic amines is among the top five reactions carried out globally for the production of high-value materials, ranging from from bulk chems. to pharmaceuticals and polymers. As a result of this ubiquity and diversity, methods for their preparation impact the full spectrum of chem. syntheses in academia and industry. In general, these mols. are assembled through the stepwise introduction of a reactivity handle in place of an aromatic C-H bond (i.e., a nitro group, halogen or boronic acid) and a subsequent functionalization or cross-coupling. Here we show that aromatic amines can be constructed by direct reaction of arenes and alkyl amines using photocatalysis, without the need for pre-functionalization. The process enables the easy preparation of advanced building blocks, tolerates a broad range of functionalities, and multigram scale can be achieved via a batch-to-flow protocol. The merit of this strategy as a late-stage functionalization platform has been demonstrated by the modification of several drugs, agrochems., peptides, chiral catalysts, polymers and organometallic complexes.

Nature Chemistry published new progress about Amination, regioselective (photochem.). 90806-58-9 belongs to class isoquinoline, and the molecular formula is C10H9NO, Recommanded Product: 5-Methoxyisoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Krapcho, A. Paul; Petry, Mary E.; Getahun, Zelleka; Landi, John J. Jr.; Stallman, John; Polsenberg, Johanna F.; Gallagher, Cynthia E.; Maresch, Martin J.; Hacker, Miles P. published the artcile< 6,9-Bis[(aminoalkyl)amino]benzo[g]isoquinoline-5,10-diones. A Novel Class of Chromophore-Modified Antitumor Anthracene-9,10-diones: Synthesis and Antitumor Evaluations>, Recommanded Product: 6,9-Difluorobenzo[g]isoquinoline-5,10-dione, the main research area is anthracenedione preparation antitumor; benzoisoquinoline preparation antitumor.

Synthetic procedures have been developed which lead to the 2-aza congeners I (R = amine groups or N-containing heterocyclic groups) and several related N-oxides (II, R = NH2 or NMe2). I exhibited a wide range of in vitro cytotoxicity against L1210 leukemia, the human colon adenocarcinoma cell line LoVo, and the doxorubicin resistant LoVo/DX cell line. Selected analogs of I showed significant P388 antileukemic activity in mice with I (R = NH2, n = 2) exhibiting high activity. This activity was also retained in the related N-oxide II (R = NH2, n = 2). These heterocyclic bioisosteric models are representative of the first anthracene-9,10-diones which display antileukemic activity comparable to mitoxantrone.

Journal of Medicinal Chemistry published new progress about Antitumor agents. 144511-13-7 belongs to class isoquinoline, and the molecular formula is C13H5F2NO2, Recommanded Product: 6,9-Difluorobenzo[g]isoquinoline-5,10-dione.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Liang, Jun; Van Abbema, Anne; Balazs, Mercedesz; Barrett, Kathy; Berezhkovsky, Leo; Blair, Wade S.; Chang, Christine; Delarosa, Donnie; De Voss, Jason; Driscoll, Jim; Eigenbrot, Charles; Goodacre, Simon; Ghilardi, Nico; MacLeod, Calum; Johnson, Adam; Bir Kohli, Pawan; Lai, Yingjie; Lin, Zhonghua; Mantik, Priscilla; Menghrajani, Kapil; Nguyen, Hieu; Peng, Ivan; Sambrone, Amy; Shia, Steven; Smith, Jan; Sohn, Sue; Tsui, Vickie; Ultsch, Mark; Williams, Karen; Wu, Lawren C.; Yang, Wenqian; Zhang, Birong; Magnuson, Steven published the artcile< Identification of an imidazopyridine scaffold to generate potent and selective TYK2 inhibitors that demonstrate activity in an in vivo psoriasis model>, Computed Properties of 552331-06-3, the main research area is imidazopyridine derivative preparation TYK2 inhibitor psoriasis; IL-23; Imidazopyridine; Kinase; Psoriasis; TYK2.

Herein we report identification of an imidazopyridine class of potent and selective TYK2 inhibitors, exemplified by prototype 6, through constraint of the rotatable amide bond connecting the pyridine and aryl rings of compound 1. Further optimization led to generation of compound 30 that potently inhibits the TYK2 enzyme and the IL-23 pathway in cells, exhibits selectivity against cellular JAK2 activity, and has good pharmacokinetic properties. In mice, compound 30 demonstrated dose-dependent reduction of IL-17 production in a PK/PD model as well as in an imiquimod-induced psoriasis model. In this efficacy model, the IL-17 decrease was accompanied by a reduction of ear thickness indicating the potential of TYK2 inhibition as a therapeutic approach for psoriasis patients.

Bioorganic & Medicinal Chemistry Letters published new progress about Antipsoriatic agents. 552331-06-3 belongs to class isoquinoline, and the molecular formula is C9H5BrClN, Computed Properties of 552331-06-3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Evison, Benny J.; Palmer, James T.; Lambert, Gilles; Treutlein, Herbert; Zeng, Jun; Nativel, Brice; Chemello, Kevin; Zhu, Qing; Wang, Jie; Teng, Yanfen; Tang, Wei; Xu, Yanfeng; Rathi, Anuj Kumar; Kumar, Sanjay; Suchowerska, Alexandra K.; Parmar, Jasneet; Dixon, Ian; Kelly, Graham E.; Bonnar, James published the artcile< A small molecule inhibitor of PCSK9 that antagonizes LDL receptor binding via interaction with a cryptic PCSK9 binding groove>, Application In Synthesis of 721401-43-0, the main research area is cardiovascular disease PCSK9 LDL receptor cholesterol mall moleculep; Cardiovascular disease; LDL cholesterol; LDL receptor; Low density lipoprotein (LDL); Proprotein convertase (PC) subtilisin kexin type 9 (PCSK9); Small molecule.

Proprotein convertase (PC) subtilisin kexin type 9 (PCSK9) inhibits the clearance of low d. lipoprotein (LDL) cholesterol from plasma by directly interacting with the LDL receptor (LDLR). As the interaction promotes elevated plasma LDL cholesterol levels and a predisposition to cardiovascular disease (CVD), it has attracted much interest as a therapeutic target. While anti-PCSK9 monoclonal antibodies have been successful in the treatment of hypercholesteremia by decreasing CVD risk, their high cost and a requirement for injection have prohibited widespread use. The advent of an orally bioavailable small mol. inhibitor of the PCSK9-LDLR interaction is an attractive alternative, however efforts have been tempered as the binding interface is unfavorable for binding by small organic mols. Despite its challenging nature, we report herein the discovery of compound 3f as a small mol. inhibitor of PCSK9. The kinase inhibitor nilotinib emerged from a computational screen that was applied to identify compounds that may bind to a cryptic groove within PCSK9 and proximal to the LDLR-binding interface. A subsequent in vitro PCSK9-LDLR binding assay established that nilotinib was a bona fide but modest inhibitor of the interaction (IC50 = 9.8 μM). Through multiple rounds of medicinal chem., 3f emerged as a lead-like mol. by demonstrating disruption of the PCSK9-LDLR interaction at nanomolar levels in vitro (IC50 = 537 nM) with no inhibitory activity (IC50 > 10 μM) against a small panel of kinases. Compound 3f restored LDL uptake by liver cells at sub-micromolar levels and demonstrated excellent bioavailability when delivered s.c. in mice. Most significantly, compound 3f lowered total cholesterol levels in the plasma of wild-type mice, thereby providing proof-of-concept that the notion of a small mol. inhibitor against PCSK9 is therapeutically viable.

Bioorganic & Medicinal Chemistry published new progress about Bioavailability. 721401-43-0 belongs to class isoquinoline, and the molecular formula is C9H8BNO2, Application In Synthesis of 721401-43-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chilamari, Maheshwerreddy; Immel, Jacob R.; Bloom, Steven published the artcile< General Access to C-Centered Radicals: Combining a Bioinspired Photocatalyst with Boronic Acids in Aqueous Media>, Safety of Isoquinolin-8-ylboronic acid, the main research area is radical preparation photocatalyzed oxidation boronic acid catalyst reaction mechanism; conjugate addition reaction radical Michael acceptor.

Carbon-centered radicals are indispensable building blocks for modern synthetic chem. In recent years, visible light photoredox catalysis has become a promising avenue to access C-centered radicals from a broad array of latent functional groups, including boronic acids. Herein, we present an aqueous protocol wherein water features a starring role to help transform aliphatic, aromatic, and heteroaromatic boronic acids to C-centered radicals with a bioinspired flavin photocatalyst. These radicals are used to deliver a diverse pool of alkylated products, including three pharmaceutically relevant compounds, via open-shell conjugate addition to disparate Michael acceptors. The mechanism of the reaction is investigated by computational studies, deuterium labeling, radical-trapping experiments, and spectroscopic anal.

ACS Catalysis published new progress about Alkylation (deborylative-alkylation). 721401-43-0 belongs to class isoquinoline, and the molecular formula is C9H8BNO2, Safety of Isoquinolin-8-ylboronic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem