Day: April 6, 2022

Name: 5-(11bR)-Dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl-5H-dibenz[b,f]azepine. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 5-(11bR)-Dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl-5H-dibenz[b,f]azepine, is researched, Molecular C34H22NO2P, CAS is 1265884-98-7, about Asymmetric Total Synthesis of Mycoleptodiscin A. Author is Zhou, Shupeng; Chen, Hao; Luo, Yijie; Zhang, Wenhao; Li, Ang.

The first total synthesis of mycoleptodiscin A, a structurally unusual indolosesquiterpenoid possessing an ortho-benzoquinone motif, has been accomplished. A sulfone alkylation coupled two readily available fragments to give an aryl triene intermediate. The tetracyclic core of the mol. was assembled through a highly enantioselective iridium-catalyzed polyene cyclization. The benzylic homologation was achieved by a cationic cyanation. The indole motif was constructed via a copper-mediated intramol. C-N bond formation at a late stage.

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1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 5-(11bR)-Dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl-5H-dibenz[b,f]azepine(SMILESS: N1(P2OC3=CC=C4C=CC=CC4=C3C5=C6C=CC=CC6=CC=C5O2)C7=CC=CC=C7C=CC8=CC=CC=C81,cas:1265884-98-7) is researched.COA of Formula: C3H3NO. The article 《Catalytic asymmetric C-C cross-couplings enabled by photoexcitation》 in relation to this compound, is published in Nature Chemistry. Let’s take a look at the latest research on this compound (cas:1265884-98-7).

Here, authors show how by simply using visible light can divert the established ionic reactivity of a chiral allyl-iridium(III) complex to switch on completely new catalytic functions, enabling mechanistically unrelated radical-based enantioselective pathways. Photoexcitation provides the chiral organometallic intermediate with the ability to activate substrates via an electron-transfer manifold. This redox event unlocks an otherwise inaccessible cross-coupling mechanism, since the resulting iridium(II) center can intercept the generated radicals and underwent a reductive elimination to forge a stereogenic center with high stereoselectivity. This photochem. strategy enables difficult-to-realize enantioselective alkyl-alkyl cross-coupling reactions between allylic alcs. and readily available radical precursors, which are not achievable under thermal activation.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Category: dioxole. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: H-Trp-OMe.HCl, is researched, Molecular C12H15ClN2O2, CAS is 7524-52-9, about Mild and Chemoselective Thioacylation of Amines Enabled by the Nucleophilic Activation of Elemental Sulfur. Author is Saito, Masato; Murakami, Sho; Nanjo, Takeshi; Kobayashi, Yusuke; Takemoto, Yoshiji.

A mild and chemoselective method for the thioacylation of amines using α-keto acids and elemental sulfur has been developed. The key to the success of this transformation is the nucleophilic activation of elemental sulfur by thiols such as 1-dodecanethiol. A variety of functional groups, including unprotected hydroxyl, carboxyl, amide, sulfide, and tertiary amine moieties, are tolerated under the applied reaction conditions. To demonstrate the advantages of this method compared with conventional O-S exchange reactions using Lawesson’s reagent or P2S5, thioamide moieties were introduced site-specifically into biol. active compounds

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1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

COA of Formula: C4H7BrO2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 2-Bromomethyl-1,3-dioxolane, is researched, Molecular C4H7BrO2, CAS is 4360-63-8, about Ruthenium(II)biscarboxylate-Catalyzed Hydrogen-Isotope Exchange by Alkene C-H Activation. Author is Bechtoldt, Alexander; Ackermann, Lutz.

Ruthenium(II) biscarboxylate catalysis enabled efficient hydrogen isotope exchange of acrylic C-H bonds with user-friendly D2O. The C-H labeling was characterized by excellent positional selectivity and a broad functional group tolerance. The deuteration was successfully conducted on 55 mmol scale with TONs of >1000, while mechanistic studies provided insights into ruthenium(II) oxidase catalysis. The obtained deuterated alkenes enabled the synthesis of labeled standards for mass spectrometry of irradiated foodstuffs.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide, is researched, Molecular C11H13OP, CAS is 707-61-9, about Research and development of phospha sugar anti-cancer agents with anti-leukemic activity.Quality Control of 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide.

We have synthesized three deoxybromophospha sugar analogs, 4-bromo-3-methyl-1-phenyl-2-phospholene 1-oxide (MBMPP (2)), 2,3-dibromo-3-methyl-1-phenylphospholane 1-oxide (DBMPP (3)), the 2,3,4-tribromo-3-methyl-1-phenylphospholane 1-oxide (TBMPP (4)), by the reaction of 3-methyl-1-phenyl-2-phospholene 1-oxide (1b) and/or 2 with bromine, and investigated their potentials as anti-leukemic agents against human leukemia cell lines of K562 and U937. Cells’ growth inhibition was determined by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) in vitro assay. All agents showed inhibitory effects on leukemia cell proliferation, indicating that inhibition appeared to be dependent on number of bromine substituent in the heterocyclic structure. Further, the phospha sugar derivatives did not show any inhibitory effects on normal cell proliferation. These agents may facilitate the development of new strategies in mol. targeting anti-leukemic therapy.

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1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 6,7-Dichlorobenzo[d]thiazol-2-amine( cas:25150-27-0 ) is researched.Name: 6,7-Dichlorobenzo[d]thiazol-2-amine.Baldaniya, B. B. published the article 《Synthesis, characterization and biological activity of 5-arylidene-3-(6,7-dichloro-1,3-benzothiazol-2-yl)-phenyl-3,5-dihydro-4H-imidazol-4-ones》 about this compound( cas:25150-27-0 ) in E-Journal of Chemistry. Keywords: arylidene oxazolone condensation benzothiazolamine; imidazolone arylidene benzothiazolyl preparation antibacterial antifungal activity. Let’s learn more about this compound (cas:25150-27-0).

Some novel 5-arylidene-3-(6,7-dichloro-1,3-benzothiazol-2-yl)-2-phenyl-3,5-dihydro-4H-imidazol-4-ones were synthesized and characterized by elemental analyses, IR, NMR, and mass spectra. The products were evaluated for antibacterial and antifungal activities against different strains of bacteria and fungi.

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1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Application of 4360-63-8. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 2-Bromomethyl-1,3-dioxolane, is researched, Molecular C4H7BrO2, CAS is 4360-63-8, about Nickel-Catalyzed Cross-Electrophile Reductive Couplings of Neopentyl Bromides with Aryl Bromides. Author is Biswas, Soumik; Qu, Bo; Desrosiers, Jean-Nicolas; Choi, Younggi; Haddad, Nizar; Yee, Nathan K.; Song, Jinghua J.; Senanayake, Chris H..

5-Cyanoimidazole was identified as an inexpensive ligand for nickel-catalyzed cross-electrophile couplings by screening a diverse set of pharmaceutical compound library. A strategic screening approach led to the discovery of this novel ligand, which was successfully applied in the preparation of various alkylated arene products with good to high yields. Furthermore, the properties of this ligand allowed expanding the scope of reductive couplings to challenging substrates, such as sterically hindered neopentyl halides, which are known to generate motifs that are prevalent in biol. active mols.

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1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 7524-52-9, is researched, Molecular C12H15ClN2O2, about Synthesis and antimalarial activity of (S)-methyl-(7-chloroquinolin-4-ylthio)acetamidoalquilate derivatives, the main research direction is methyl chloroquinolinylthio acetamidoalquilate preparation antimalarial activity SAR.COA of Formula: C12H15ClN2O2.

The synthesis of five new (S)-methyl-(7-chloroquinolin-4-ylthio)acetamidoalquilate derivatives I (R = Me, propan-2-yl, 2-methylpropyl, benzyl,1H-indol-3-ylmethyl) is carried out under a modified version of the Steglich esterification reaction between different L-amino acid Me esters (S)-H2NCH(R)C(O)OCH3.HCl and 2-(7-chloroquinolin-4-ylthio)acetic acid. Two of the compounds showed significant inhibition (>50%) of β-hematin formation. The two active structures were tested in vivo as potential antimalarials in mice infected with Plasmodium berghei ANKA, a chloroquine susceptible strain. Compounds I (R = propan-2-yl, 1H-indol-3-ylmethyl) exhibited antimalarial activity comparable to that of chloroquine.

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1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Yun, Fan; Cheng, Chunhui; Zhang, Jing; Li, Jingxuan; Liu, Xia; Xie, Rui; Tang, Pingwah; Yuan, Qipeng published the article 《Boric Acid Catalyzed Direct Amidation between Amino-Azaarenes and Carboxylic Acids》. Keywords: azaarylamide preparation green chem chemoselective; aminoazaarene carboxylic acid boric acid tetramethylpropanediamine catalyst amidation.They researched the compound: 5-Chloropyridin-3-amine( cas:22353-34-0 ).Computed Properties of C5H5ClN2. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:22353-34-0) here.

A novel and facile boric acid-catalyzed direct amidation between amino-azaarene compounds and carboxylic acids was developed. The amidation proceeded cleanly and provided good to excellent yields of the desired amides. Boric acid is a green and inexpensive catalyst. It was also found that N,N,N’,N’-tetramethylpropane-1,3-diamine acted as an additive accelerating this boric acid-catalyzed amidation. A mixed acid anhydride was postulated to be the active intermediate responsible for this successful amidation. This direct amidation was an atom- and step-economical reaction.

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1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Computed Properties of C34H22NO2P. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5-(11bR)-Dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl-5H-dibenz[b,f]azepine, is researched, Molecular C34H22NO2P, CAS is 1265884-98-7, about Enantio- and Diastereodivergent Dual Catalysis: α-Allylation of Branched Aldehydes. Author is Krautwald, Simon; Sarlah, David; Schafroth, Michael A.; Carreira, Erick M..

An important challenge in asym. synthesis is the development of fully stereodivergent strategies to access the full complement of stereoisomers of products bearing multiple stereocenters. In the ideal case, where four products are possible, applying distinct catalysts to the same set of starting materials under identical conditions would in a single step afford any given stereoisomer. Herein, the authors describe the realization of this concept in a fully stereodivergent dual-catalytic synthesis of γ,δ-unsaturated aldehydes bearing vicinal quaternary/tertiary stereogenic centers. The reaction is enabled by chiral iridium and amine catalysts, which activate the allylic alc. and aldehyde substrates, resp. Each catalyst exerts high local stereocontrol irresp. of the other’s inherent preference.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem