Day: November 10, 2022

van Gemmeren, Manuel published the artcileSwitchable Site-Selective Catalytic Carboxylation of Allylic Alcohols with CO2, Safety of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is carbon dioxide allylic alc carboxylation; allylic carboxylic acid regioselective preparation nickel catalyst reaction mechanism; carbon dioxide; cross-coupling; nickel; regioselectivity; synthetic methods.

A switchable site-selective catalytic carboxylation of allylic alcs. has been developed in which CO2 is used with dual roles, both facilitating C-OH cleavage and as a C1 source. This protocol is characterized by its mild reaction conditions, absence of stoichiometric amounts of organometallic reagents, broad scope, and exquisite regiodivergency which can be modulated by the type of ligand employed.

Angewandte Chemie, International Edition published new progress about Carboxylation. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Safety of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Su, Wei published the artcileStereoselective Dehydroxyboration of Allylic Alcohols to Access (E)-Allylboronates by a Combination of C-OH Cleavage and Boron Transfer under Iron Catalysis, Name: 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is iron catalyzed stereoselective dehydroxyboration allylic alc; allyl boronate preparation transformation; carbon hydroxide bond cleavage boron transfer.

Iron-catalyzed direct SN2′ dehydroxyboration of allylic alcs. has been developed to access (E)-stereoselective allylboronates. Allylic alcs. with diverse structures and functional groups, especially derived from natural products, underwent smooth transformation. The six-membered ring transition state formed by allylic alcs. and iron-boron intermediate was indicated to be the key component involved in transfer of the boron group, activation of the C-OH bond, and control of the stereoselectivity.

Organic Letters published new progress about Bond cleavage. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Name: 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wang, Xuchao published the artcileRedox-Neutral Nickel-Catalyzed Cross-Coupling Reactions of (Homo)allylic Alcohols and Aryltriflates, Computed Properties of 151-10-0, the main research area is alkenyl alc aryltriflate nickel catalyst cross coupling; aryl alkanone preparation.

A redox-neutral Ni-catalyzed cross-coupling reaction of two readily available precursors to produce the corresponding ketones that are an important structural motif in numerous biol. active entities. By the use of a com. available nickel/Triphos catalytic system, a range of easily accessible alkenyl primary alcs. and aryltriflates can be converted in a rapidly assembled fashion to valuable ketones with good yields and wide functional group tolerance. The utility of this transformation shown by late-stage functionalization of a large set of complex mols. with good efficiency, which offers a distinct entry to more functionalized aromatic ketones.

ACS Catalysis published new progress about Alkyl aryl ketones Role: SPN (Synthetic Preparation), PREP (Preparation). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Computed Properties of 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Xia, Aiyou published the artcileNickel-Catalyzed Cyanation of Unactivated Alkyl Sulfonates with Zn(CN)2, Application of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is nickel catalyst cyanation unactivated alkyl sulfonate zinc cyanide; alkyl nitrile preparation.

Cyanation of unactivated primary and secondary alkyl mesylates with Zn(CN)2 catalyzed by nickel has been developed. The reaction provides an efficient route for the synthesis of alkyl nitriles with wide substrate scope, good functional group tolerance, and compatibility with heterocyclic compounds Mechanistic studies indicate that alkyl iodide generated in situ serves as the reactive intermediate and the gradual release of alkyl iodide is crucial for the success of the reaction.

Organic Letters published new progress about Cyanation. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Application of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bettenhausen, Harmonie M. published the artcileMass Spectrometry Metabolomics of Hot Steep Malt Extracts and Association to Sensory Traits, Synthetic Route of 21834-92-4, the main research area is hot steep malt extract sensory trait mass spectrometry metabolomics.

In the brewing industry, there is value in defining sensory attributes of malt, and recent protocols have been developed that enable anal. of aroma and taste. One method, the “”hot steep”” is a hot water extract that is highly reproducible and able to distinguish malt flavor. However, the chem. of the hot steep extracts has not been fully defined, and the links between specific metabolites of the hot steep and their resulting sensory attributes remains largely unknown. Here, a study was designed to describe the metabolite chem. of hot steep extracts, and to characterize variation in this chem. and corresponding sensory by comparative anal. of 12 com. pale malts. Metabolomics was performed on the 12 malt hot steep extracts using three mass spectrometry platforms to detect volatiles (HS/SPME-GC-MS) and non-volatiles (UHPLC-TOF-MS and GC-MS). The anal. detected a total of 1,026 compounds including lipids, organic acids, esters, and Maillard Reaction Products (MRPs), of which 162 compounds (15.7%) varied among the 12 hot steep extracts Sensory of the 12 hot steep extracts was performed using an integrated Check All That Apply and quant. anal. method for 14 traits, and the data revealed cereal, grassy, and dough aromas were the attributes that varied. The metabolomics and sensory data were integrated using OPLS anal. The anal. revealed 64 compounds strongly associated with cereal aroma and included MRPs. A total of 23 compounds were strongly associated with grassy aroma including alkane/alkenes, benzenoids, organic acids, lipids, and fatty acid esters. Taken together, these data highlight the utility of the hot steep extract to differentiate malt for flavor and chem. and indicate specific compounds that drive the most dominant flavors observed in this population of pale malts.

Journal of the American Society of Brewing Chemists published new progress about Alkenes Role: ANT (Analyte), FFD (Food or Feed Use), ANST (Analytical Study), BIOL (Biological Study), USES (Uses). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Synthetic Route of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Xu, Rui published the artcileThree-component difluoroalkylamination of alkenes mediated by photoredox and iron cooperative catalysis, Computed Properties of 5961-59-1, the main research area is alkene photochem difluoroalkylamination aryl amine difluorobromoacetate iron catalyst; ester arylamino difluoro preparation.

A three-component difluoroalkylamination of alkenes R1CH:CHR2 (R1 = Ph, 4-MeC6H4, 3-BrC6H4, C6F5, PhCH2, etc., R2 = H; R1 = Ph, R2 = Me) with BrCF2CO2Et and amines R3NHR4 (R3 = Ph, 4-MeC6H4, 4-MeOC6H4, R4 = Me; R3 = Ph, R4 = H) mediated by visible-light photoredox and iron cooperative catalysis to produce fluorinated amino esters R3R4NCHR1CHR2CF2CO2Et is described. Electron rich, electron poor and internal styrenes were all tolerated giving the desired products in good yields. The Csp3-Csp3 and Csp3-N bonds were simultaneously formed under mild conditions. A radical pathway was proposed by exptl. studies.

Organic & Biomolecular Chemistry published new progress about Anilines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Computed Properties of 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Liu, Peng published the artcileN-Methylation of Amines with Methanol in the Presence of Carbonate Salt Catalyzed by a Metal-Ligand Bifunctional Ruthenium Catalyst [(p-cymene)Ru(2,2′-bpyO)(H2O)], Synthetic Route of 5961-59-1, the main research area is sulfonamide methanol cesium carbonate ruthenium catalyst methylation green chem; methylsulfonamide preparation; amine methanol cesium carbonate ruthenium catalyst methylation green chem; methylamine preparation.

A ruthenium complex [(p-cymene)Ru(2,2′-bpyO)(H2O)] was found to be a general and efficient catalyst for the N-methylation of amines with methanol in the presence of carbonate salt. Moreover,a series of sensitive substituents such as nitro, ester, cyano and vinyl groups were tolerated under present conditions. It was confirmed that OH units in the ligand were crucial for the catalytic activity. Notably, this research exhibited the potential of metal-ligand bifunctional ruthenium catalysts for the hydrogen auto-transfer process.

Journal of Organic Chemistry published new progress about Amines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Synthetic Route of 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Qi, Dan published the artcilePhotoinduced synthesis of functionalized oxetanes via diradical-mediated ring contraction, Safety of 4-Methoxyphenylacetic acid, the main research area is aryl diazoacetate dihydrofuran photochem diastereoselective ring contraction; ethenyl aryl oxetane carboxylate preparation.

A versatile photochem. ring contraction was reported for the synthesis of oxetanes under catalyst-free conditions. The reaction was enabled by the use of 2,5-dihydrofurans and diazo compounds under visible light irradiation, delivering functionalized 3-vinyloxetanes as major products. The outstanding features of this protocol included mild reaction conditions, operational simplicity and scalability, as well as excellent functional-group tolerance. DFT calculations indicated that the reaction may proceed through the formation of an oxonium ylide intermediate followed by a diradical-mediated rearrangement and cyclization.

Green Chemistry published new progress about Diastereoselective synthesis. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Safety of 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Gennaiou, Kyriaki published the artcileDivergent Synthesis of Bisphenols and Diaryl Ethers by Metal Compatible Organocatalytic Aerobic Oxidation of Boronic Acids, Safety of 1,3-Dimethoxybenzene, the main research area is arylboronic acid diketopiperazine catalyst chemoselective aerobic oxidation; phenol preparation; hydroxybenzene aylboronic acid diketopiperazine catalyst chemoselective oxidative coupling; diaryl ether preparation; bisphenol preparation.

The current study showed that pyrrole-proline 2,5-diketopiperazine (DKP) organocatalyst, in the presence of Hantzsch ester and HFIP was compatible with copper(II) salts for the activation of dioxygen. These findings allowed to selectively diverge the oxidation profile of boronic acids for the synthesis of phenols, bisphenols and diaryl ethers by DKP-promoted aerobic oxidation and subsequent metal oxidative-coupling or Chan-Lam-Evans type reaction of the formed phenols.

Advanced Synthesis & Catalysis published new progress about Chemoselectivity. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Safety of 1,3-Dimethoxybenzene.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Gou, Quan published the artcileDivergent Regioselective Csp2-H Difluoromethylation of Aromatic Amines Enabled by Nickel Catalysis, Safety of 4-Methoxy-N-methylaniline, the main research area is arylamine bromodifluoroacetate nickel catalyst regioselective difluoromethylation; difluoromethylarene preparation; difluorooxindole preparation.

Herein, the first catalytic protocol for nickel-catalyzed ortho or para position difluoromethylation of various aromatic amines was developed with the assistance of a bidentate phosphine ligand, offering an invaluable synthesis means to construct extensive p-difluoromethylated products and difluorooxindole derivatives with significant functional fragments. Furthermore, the gram-scale reaction, broad substrate scope, excellent functional-group compatibility, late-stage difluoromethylation of pesticides, and even formal synthesis of HDAC6 inhibitors further demonstrate the usefulness of this method.

Organic Letters published new progress about Aromatic amines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Safety of 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem