Day: November 16, 2022

Lichitsky, Boris V. published the artcileBenzimidazolyl-pyrazolo[3,4-b]pyridinones – selective inhibitors of MOLT-4 leukemia cell growth and sea urchin embryo spiculogenesis: Target quest., Safety of 2,3-Dimethoxybenzaldehyde, the main research area is benzimidazolylpyrazolopyridinone preparation SAR human; MOLT4 leukemia cell growth spiculogenesis inhibitor; MOLT-4; benzimidazolyl-pyrazolo[3,4-b]pyridinone; cytotoxicity; sea urchin embryo; spiculogenesis.

1,3-Substituted pyrazolo[3,4-b]pyridinones were synthesized by a three-component condensation of Meldrum’s acid with aryl aldehydes and 1,3-substituted 5-aminopyrazoles. Their biol. activity was evaluated using the in vivo phenotypic sea urchin embryo assay and the in vitro cytotoxicity screen against human cancer cell lines. In the sea urchin embryo model, 1-benzimidazolyl-pyrazolo[3,4-b]pyridinones caused inhibition of hatching and spiculogenesis at submicromolar concentrations These compounds also selectively and potently inhibited growth of the MOLT-4 leukemia cell line. Subsequent structure-activity relationship studies determined the benzimidazolyl fragment as an essential pharmacophore for both effects. A preliminary QSAR target identification search did not result in tangible leads. Attempts to prepare a relevant photoaffinity probe that retained potency in both assays were not successful. 1-Benzimidazolyl-pyrazolo[3,4-b]pyridinones were further characterized for their activity in a wild type vs Notch-mutant leukemia cell lines, and in in vitro panels of kinases and matrix metalloproteinases. Using a series of diverse modulators of spiculogenesis as standards, multiple signaling networks including Notch, Wnt/-catenin, receptor tyrosine kinases (VEGF/VEGFR, FGF/FGFR), PI3K, and Raf-MEK-ERK were excluded as possible targets of 1-benzimidazolyl-pyrazolo[3,4-b]pyridinones. On the other hand, matrix metalloproteinase-9/hatching enzyme was identified as one potential target.

ACS Combinatorial Science published new progress about Benzaldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Safety of 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Feng, Guangshou published the artcileDecarboxylative C-C and C-N Bond Formation by Ligand-Accelerated Iron Photocatalysis, Application of 4-Methoxyphenylacetic acid, the main research area is unsaturated dinitrile carboxylic acid iron catalyst photochem decarboxylative addition; azodocarboxylate carboxylic acid iron catalyst photochem decarboxylative addition.

A mild and effective protocol for decarboxylative C-C and C-N bond formation through iron photocatalysis was achieved. The carboxylic acids underwent radical decarboxylation in the presence of Fe2(SO4)3 and di-(2-picolyl)amine under visible light irradiation The resulting alkyl radicals then reacted with Michael acceptors or azodicarboxylates to furnish the adducts.

European Journal of Organic Chemistry published new progress about Azo compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Application of 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Gomez-Angel, Andres R. published the artcileSynthesis and functionalization of a bifunctional normorphan 3D building block for medicinal chemistry, COA of Formula: C8H10O2, the main research area is bifunctional normorphan 3D building block diastereoselective preparation.

A multi-gram-scale synthetic route to a novel, bifunctional normorphan 3D building block bearing orthogonally reactive vinyl MIDA boronate and N-2,4-dimethoxybenzyl (DMB) amide functional handles I was developed. Synthetic manipulation at each of the functional handles was demonstrated including Suzuki-Miyaura cross-coupling, exo-diastereoselective hydrogenation, N-DMB group removal and lactam reduction Normorphan cores derived from the building block satisfied AstraZeneca’s ‘rule of 2’ for building blocks and had a high fraction of sp3 hybridized carbon atoms (Fsp3). A virtual lead-like library of 344 compounds derived from the building block had attractive lead-like properties. The 3D building block was commercialised by Redbrick Mol. and was available for purchase.

Tetrahedron published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, COA of Formula: C8H10O2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Lekky, Anek published the artcileStereoselective Convergent Synthesis of Tetrahydro-5H-benzo[c]fluorene via Nine-Membered Ring-Closing Metathesis and Transannular Acid-Mediated Cyclization/Nucleophilic Addition, Related Products of isoquinoline, the main research area is tetrahydrobenzofluorene stereoselective preparation ring closing metathesis transannular acid cyclization.

The diene Me ethers or acetates, constructed from the Li-Br exchange/addition reactions of 2-vinylbenzaldehydes and 2-(but-3-en-1-yl)bromoarenes followed by etherification or acetylation of the corresponding alcs., smoothly underwent the ring-closing metathesis (RCM) by using Hoveyda-Grubbs II as a catalyst to provide the corresponding benzannulated (Z)-cyclononenes as single products in good yields (up to 75%). The ensuing one-pot acid-mediated transannular cyclization/nucleophilic addition at C7 furnished the corresponding tetrahydro-5H-benzo[c]fluorenes as single stereoisomers with the exclusive cis stereochem. at the ring junction (C5-C6) and trans at the site of nucleophilic attack (C6-C7) on the three contiguous stereogenic centers in good to excellent yield (up to 94%). The developed strategy was general; the reaction conditions were compatible with hydride, azide, and electron-rich aromatics as nucleophiles. In addition, various methoxylated benzannulated cyclononene acetates could be employed as substrates. Thus, tetrahydro-5H-benzo[c]fluorenes could be prepared in four steps from appropriately substituted bromoarenes and benzaldehydes in good yields (up to 56%) with excellent stereo- and regio-control.

Journal of Organic Chemistry published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Byrne, Liam published the artcileEnantioselective Synthesis of Atropisomeric Biaryls using Biaryl 2,5-Diphenylphospholanes as Ligands for Palladium-Catalysed Suzuki-Miyaura Reactions, HPLC of Formula: 151-10-0, the main research area is biaryl diphenylphospholane preparation; atropisomeric biaryl heterobiaryl preparation; boronic acid aryl bromide asym Suzuki Miyaura palladium catalyst.

Herein, the development of biaryl 2,5-diphenylphospholanes as a new class of C2-sym., monodentate ligands for asym. Suzuki-Miyaura (ASM) reactions is reported. Screening of a series of exemplary phospholanes led to the identification of two ligands that were used to prepare a range of atropisomeric biaryl and heterobiaryl products with good to excellent levels of enantioselectivity (up to 97:3 e.r.) under mild conditions. DFT studies suggest that the formation of a constraining ligand pocket and coordination of one of the biaryl methoxy groups in the optimized ligands to the metal center is crucial for restricting conformational freedom in the bond-forming step.

Advanced Synthesis & Catalysis published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, HPLC of Formula: 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Scrivanti, Alberto published the artcileArylation of β-methallyl alcohol catalyzed by Pd(OAc)2 in combination with P(t-Bu)3: application to fragrance synthesis, Recommanded Product: 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is arylmethylpropana helional canthoxal lilial preparation fragrance; methallyl alc arylation aryl bromide catalyst palladium phosphine.

Pd(OAc)2 in combination with P(t-Bu)3 catalyzes the coupling of β-methallyl alc. with 1-bromo-3,4-(methylenedioxy)benzene (I), 1-bromo-4-methoxybenzene (II), or 1-bromo-4-tert-butylbenzene (III). The reaction affords the corresponding 2-methyl-3-aryl-propanals, which are valuable floral fragrances. With I or II high reaction rates are obtained at 130 °C using NMP/water mixtures and an inorganic base such as Na2CO3. The chemoselectivity of the reaction is almost complete, so that the process appears practically feasible. In contrast, the coupling of β-methallyl alc. with III proceeds with low reaction rates.

Tetrahedron published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Recommanded Product: 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Abhilash, Vishwanathan published the artcileChemoselective hydrosilylation of carboxylic acids using a phosphine-free ruthenium complex and phenylsilane, COA of Formula: C9H10O3, the main research area is alc preparation chemoselective; carboxylic acid phenylsilane agent hydrosilylation tandem ruthenium complex catalyst.

A highly chemoselective hydrosilylation of carboxylic acids RC(O)OH [R = 4-methoxyphenylmethyl, benzo[1,3]dioxol-5-yl, benzofuran-6-yl, etc.] was achieved using a bench-stable, phosphine-free Ru-complex tethered with hemi-labile thiophene ligands as the catalyst, employing phenylsilane as the reducing agent. The methodol. was further elaborated towards the one-pot synthesis of 1H-indole and 3,4-dihydro-2H-benzo[1,4]oxazine via tandem reduction/cyclization of acid and nitro group.

Journal of Organometallic Chemistry published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, COA of Formula: C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Weber, Stefan published the artcileReduction of carbonyl compounds via hydrosilylation catalyzed by well-defined PNP-Mn(I) hydride complexes, Quality Control of 1205-17-0, the main research area is alc preparation chemoselective; carbonyl compound reduction hydrosilylation manganese catalyst.

Reduction reactions of unsaturated compounds are fundamental transformations in synthetic chem. In this context, the reduction of polarized double bonds such as carbonyl or C=C motifs can be achieved by hydrogenation reactions. Authors describe here a highly chemoselective Mn(I)-based PNP pincer catalyst for the hydrosilylation of aldehydes and ketones employing polymethylhydrosiloxane (PMHS) as inexpensive hydrogen donor.

Monatshefte fuer Chemie published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Quality Control of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Xiao, Zihui published the artcileElectrochemical reduction of functionalized carbonyl compounds: enhanced reactivity over tailored nanoporous gold, Category: isoquinoline, the main research area is reusable nanoporous gold catalyst preparation pore size carbonyl reduction; carbonyl compound diphenylsilane gold nanocatalyst electrochem reduction chemoselective; alc preparation.

The effect of the pore size of nanoporous gold (NPG) on electrochem. reduction of functionalized carbonyl compounds was investigated. NPG with a pore size of ∼30 nm significantly enhanced the reactivity with high chemoselectivity at a low-potential. Typically, p-nitrobenzaldehyde reduction demonstrated a high turnover frequency (TOF) up to 232000 h-1.

Nanoscale published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kawano, Teruhiro published the artcileCatalytic Hydrogenation of Carboxamides with a Bifunctional Cp*Ru Catalyst Bearing an Imidazol-2-ylidene with a Protic Aminoethyl Side Chain, COA of Formula: C8H11NO, the main research area is amine preparation; carboxamide hydrogenation ruthenium catalyst.

Synthesis of a Cp*Ru complex bearing an NH2-functionalized N-heterocyclic carbene (C-NH) I (R = CH3) was achieved by treatment of Cp*RuBr(isoprene) with an equimolar amount of a silver complex, which was generated from Ag2O and 1-(2-aminoethyl)-3-methylimidazolium bromide, in CH3CN at room temperature The new Cp*RuBr(C-NH) complex I showed a higher catalytic performance than the related Cp*RuCl(P-NH) and Cp*RuCl(N-NH) complexes. In the reaction of N-arylcarboxamides R1C(O)NR2R3 (R1 = H, C6H5, pyridin-3-yl; R2 = R3 = CH3; R2 = H, R3 = C6H5; R2R3 = -C(O)(CH2)3-, etc.), the amine products R2R3NH were obtained in satisfactory yields under mild temperature conditions.

Synthesis published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, COA of Formula: C8H11NO.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem