Day: November 16, 2022

Yang, Tao published the artcileChemoselective Union of Olefins, Organohalides, and Redox-Active Esters Enables Regioselective Alkene Dialkylation, HPLC of Formula: 104-01-8, the main research area is alkenyl amide ester haloalkane nickel chemoselective regioselective dialkylation; amide dialkyl preparation.

Multicomponent catalytic processes that can generate multiple C(sp3)-C(sp3) bonds in a single step under mild conditions, particularly those that employ inexpensive catalysts and substrates, are highly sought-after in chem. research for complex mol. synthesis. Here, we disclose an efficient Ni-catalyzed reductive protocol that chemoselectively merges alkenyl amides with two different aliphatic electrophiles. Starting materials are readily accessible from stable and abundant feedstock, and products are furnished in up to >98:2 regioisomeric ratios. The present strategy eliminates the use of sensitive organometallic reagents, tolerates a wide array of complex functionalities, and enables regiodivergent addition of two primary alkyl groups bearing similar electronic and steric attributes across aliphatic C=C bonds with exquisite control of site selectivity. Utility is underscored by the concise synthesis of bioactive compounds and postreaction functionalizations leading to structurally diverse scaffolds. DFT studies revealed that the regiochem. outcome originates from the orthogonal reactivity and chemoselectivity profiles of in situ generated organonickel species.

Journal of the American Chemical Society published new progress about Alkanes Role: SPN (Synthetic Preparation), PREP (Preparation). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, HPLC of Formula: 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhu, Qilei published the artcilePhotocatalytic Hydromethylation and Hydroalkylation of Olefins Enabled by Titanium Dioxide Mediated Decarboxylation, Quality Control of 104-01-8, the main research area is carboxylic acid alkene titanium dioxide light photocatalytic hydroalkylation decarboxylation; alkane preparation.

A versatile method for the hydromethylation and hydroalkylation of alkenes at room temperature is achieved by using the photooxidative redox capacity of the valence band of anatase titanium dioxide (TiO2). Mechanistic studies support a radical-based mechanism involving the photoexcitation of TiO2 with 390 nm light in the presence of acetic acid and other carboxylic acids to generate Me and alkyl radicals, resp., without the need for stoichiometric base. This protocol is accepting of a broad scope of alkene and carboxylic acids, including challenging ones that produce highly reactive primary alkyl radicals and those containing functional groups that are susceptible to nucleophilic substitution such as alkyl halides. This methodol. highlights the utility of using heterogeneous semiconductor photocatalysts such as TiO2 for promoting challenging organic syntheses that rely on highly reactive intermediates.

Journal of the American Chemical Society published new progress about Alkanes Role: SPN (Synthetic Preparation), PREP (Preparation). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Quality Control of 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Shon, Jong-Hwa published the artcilePhotoredox catalysis on unactivated substrates with strongly reducing iridium photosensitizers, COA of Formula: C8H10O2, the main research area is aryl halide alkyl hydrodehalogenation iridium photocatalyst.

In this work, the strong bis-cyclometalated iridium photoreductants with electron-rich β-diketiminate (NacNac) ancillary ligands enable high-yielding photoredox transformations of challenging substrates with very simple reaction conditions that require only a single sacrificial reagent. Using blue or green visible-light activation a variety of reactions, which include hydrodehalogenation, cyclization, intramol. radical addition, and prenylation via radical-mediated pathways, with optimized conditions that only require the photocatalyst and a sacrificial reductant/hydrogen atom donor were demonstrated. Many of these reactions involve organobromide and organochloride substrates RX (R = 3-methoxyphenyl, 4-cyanophenyl, {1-[(benzyloxy)carbonyl]piperidin-4-yl}, etc.; X = Br, Cl) which in the past have had limited utility in photoredox catalysis. This work paves the way for the continued expansion of the substrate scope in photoredox catalysis.

Chemical Science published new progress about Alkanes Role: SPN (Synthetic Preparation), PREP (Preparation). 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

McLaughlin, Calum published the artcileCatalytic enantioselective synthesis of 1,4-dihydropyridines via the addition of C(1)-ammonium enolates to pyridinium salts, Name: 4-Methoxyphenylacetic acid, the main research area is aromatic ester pyridinium salt isothiourea catalyst dearomatization; dihydropyridine enantioselective regioselective preparation.

The regio- and stereoselective addition of C(1)-ammonium enolates – generated in situ from aryl esters and the isothiourea catalyst (R)-BTM – to pyridinium salts bearing an electron withdrawing substituent in the 3-position allowed the synthesis of a range of enantioenriched 1,4-dihydropyridines. This represented the first organocatalytic approach to pyridine dearomatization using pronucleophiles at the carboxylic acid oxidation level. Optimization studies revealed a significant solvent dependency upon product enantioselectivity, with only toluene providing significant asym. induction. Using DABCO as a base also proved beneficial for product enantioselectivity, while investigations into the nature of the counterion showed that co-ordinating bromide or chloride substrates led to higher product er than the corresponding tetrafluoroborate or hexafluorophosphate. The scope and limitations of this process were developed, with enantioselective addition to 3-cyano- or 3-sulfonylpyridinium salts giving the corresponding 1,4-dihydropyridines (15 examples, up to 95 : 5 dr and 98 : 2 er).

Chemical Science published new progress about Addition reaction catalysts, stereoselective (regioselective). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Name: 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Guin, Avishek published the artcileLewis Acid Catalyzed Ring-Opening 1,3-Aminothiolation of Donor-Acceptor Cyclopropanes Using Sulfenamides, Name: 4-Methoxy-N-methylaniline, the main research area is arylaminoalkyl arylthio malonic diester preparation; cyclopropane sulfenamide regioselective ring opening Lewis acid catalyst.

Yb(OTf)3 catalyzed mild and regioselective ring-opening 1,3-aminothiolation of donor-acceptor (D-A) cyclopropanes using sulfenamides has been demonstrated. The insertion of the C-C σ-bond of D-A cyclopropanes into the S-N σ-bond of sulfenamides allows the synthesis of diverse γ-aminated α-thiolated malonic diesters in moderate to good yields (up to 87%) with good functional group compatibility. The stereospecificity of the reaction was demonstrated using enantiomerically pure D-A cyclopropane.

Organic Letters published new progress about Cyclopropanes Role: RCT (Reactant), RACT (Reactant or Reagent). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Name: 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Tran, Van Hieu published the artcilePractical direct synthesis of N-aryl-substituted azacycles from N-alkyl protected arylamines using TiCl4 and DBU, SDS of cas: 5961-59-1, the main research area is aryl substituted azacycle preparation; alkyl protected arylamine cyclic ether titanium tetrachloride diazabicyclo undecene.

A novel transformation of N-alkyl protected arylamines and cyclic ethers into N-aryl substituted azacycles is described. Alkyl groups have been used for the protection of amines in organic syntheses. In this synthesis, N-alkyl protected arylamines were reacted with cyclic ethers in the presence of TiCl4 and DBU, crucial reagents affording five- and six-membered azacycles. In particular, utilization of the novel TiCl4/DBU-mediated reaction allows various N-alkyl protected arylamines such as N-methyl-, N-ethyl-, N-iso-Pr, and N-tert-Bu arylamines to be readily converted into N-aryl substituted azacycles in high yields. This practical approach using various N-alkyl arylamines leads to the efficient preparation of azacycles.

Organic & Biomolecular Chemistry published new progress about Cyclic ethers Role: RCT (Reactant), RACT (Reactant or Reagent). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, SDS of cas: 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Schuhmacher, Anne published the artcileCatalytic Synthesis of Potassium Acyltrifluoroborates (KATs) from Boronic Acids and the Thioimidate KAT Transfer Reagent, Product Details of C2H6N2O, the main research area is potassium acyltrifluoroborate preparation; boronic acid thioimidate transfer reagent cross coupling palladium catalyst; acylboron compounds; boronic acids; cross-coupling; synthetic methods; zwitterions.

We report the synthesis of potassium acyltrifluoroborates (KATs) by a palladium-catalyzed cross-coupling of boronic acids and the thioimidate KAT transfer reagent. The combination of widely available aryl- and vinylboronic acids with com. available thioimidate using catalytic PdII and a CuII additive enables the preparation of KATs in high yields and with good functional group tolerance. This formal insertion of CO into organoboronic acids can also be applied to boronic acid pinacol esters and potassium organotrifluoroborates using a slightly modified procedure. The cross-coupling can be telescoped into the one-pot synthesis of amides and α-aminotrifluoroborates by exploiting the unique chem. of KATs and their trifluoroborate iminium (TIM) derivatives

Angewandte Chemie, International Edition published new progress about Boronic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Product Details of C2H6N2O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Qian, Bing-Feng published the artcileNew (μ-oxo)bis(μ-carboxylato)diruthenium(III) complexes containing 1,4,7-trimethyl-1,4,7-triazacyclononane ligands, Related Products of isoquinoline, the main research area is dinuclear ruthenium trimethyltriazacyclononane benzoato phenylacetato complex catalyst preparation electrochem; crystal structure dinuclear ruthenium trimethyltriazacyclononane benzoato phenylacetato complex.

Treatment of [(Me3tacn)RuCl3·H2O] (Me3tacn = 1,4,7-trimethyl-1,4,7-triazacyclononane) with substituted benzoic acid or phenylacetic acid, in water in the presence of potassium hexafluorophosphate gave cationic dinuclear Ru(III)-Ru(III) (μ-oxo)bis(μ-carboxylato) complexes [(Me3tacn)2Ru2(μ-O)(μ-OOCR)2](PF6)2 (R = Ph, 1; -py, 2; -C6H4-2-Cl, 3; -C6H3-2,4-Cl2, 4; -CH2C6H4-2-CH3, 5; -CH2C6H4-4-CH3, 6; -CH2C6H4-4-OCH3, 7; -CH2C6H4-4-Cl, 8). All complexes are well characterized by IR, UV/visible and mass spectroscopies, and their electrochem. properties were also investigated. The mol. structures of 1, 2·2C3H6O, 5·2C3H6O, 7 and 8 were also established by single-crystal x-ray diffraction. The photocatalytic properties for H2 evolution by water splitting of complexes 1, 2, 3, 5, and 7 were also investigated.

Inorganica Chimica Acta published new progress about Benzoic acids 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, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Devi, Lagudu published the artcileA green, efficient protocol for the catalyst-free synthesis of tetrahydro-1H-pyrazolo-[3,4-b]-quinolin-5(4H)-ones supported by ultrasonic irradiation, Name: 2,3-Dimethoxybenzaldehyde, the main research area is amino phenylpyrazole benzaldehyde dimedone three component reaction green chem; diphenyl tetrahydropyrazoloquinolinone preparation ultrasonication.

A green and efficient protocol for the one-pot, multicomponent, catalyst-free synthesis of tetrahydro-1H-pyrazolo[3,4-b]quinolin-5(4H)-ones I [R = 2-hydroxyphenyl, 4-ethylphenyl, 3-nitrophenyl, etc.] from the reaction of 5-amino-3-methyl-1-phenylpyrazole, benzaldehydes and dimedone in ethanol as green solvent under ultrasound irradiation was described. This protocol offered several benefits such as simple handling, easy workup process, waste-free, milder reaction conditions, cleaner reaction, environment-friendly, short reaction times, absence of any tedious purification and excellent yields.

Chemical Data Collections 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, Name: 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Devi, Lagudu published the artcileA rapid, sustainable and environmental friendly protocol for the catalyst-free synthesis of 2-methyl-5-oxo-hexahydroquinoline-3-carboxylate via ultrasonic irradiation, Application In Synthesis of 86-51-1, the main research area is methyl oxo hexahydroquinoline carboxylate green preparation ultrasonic irradiation; benzaldehyde cyclohexanedione benzyl acetoacetate multicomponent.

A facile, economic, highly valuable and sustainable protocol for the synthesis of substituted 2-methyl-5-oxo-hexahydroquinoline-3-carboxylate derivatives I [R = 2-FC6H4, 2-BrC6H4, 4-N(Me)2C6H4, etc.] was developed via one-pot, the multicomponent reaction of various benzaldehydes, 1,3-cyclohexanedione, benzyl acetoacetate and ammonium acetate in EtOH under ultrasound irradiation at room temperature condition. Employment of green solvent and catalyst-free conditions made this approach very fascinating from cost-effective and eco-friendly viewpoints. Mainly, this protocol offered various benefits such as easy handling, cleaner reaction, operational simplicity, simple work-up system, excellent yields (92-98%), rapid reaction time and condensed environmental consequences.

Chemical Data Collections 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, Application In Synthesis of 86-51-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem