881-89-0

Upstream product

• 5271-67-0 2-Thiophenecarbonyl chloride 
• 108-95-2 phenol 
• 30930-49-5 bis(2-thiophenecarbonyl) peroxide 
• 71-43-2 benzene 
• 108-86-1 bromobenzene 
• 108-90-7 chlorobenzene 
• 96-43-5 2-thienyl chloride 
• 201230-82-2 carbon monoxide 
• 527-72-0 2-thiophenylcarboxylic acid 
• 91059-63-1 4-nitrophenyl 2-thiophenecarboxylic acid ester 
• 347367-39-9 pyridin-2-yl thiophene-2-carboxylate 
• 98-80-6 phenylboronic acid 
• 82649-27-2 1,3-dioxoisoindolin-2-yl thiophene-2-carboxylate 
• 25569-97-5 thiophen-2-carboxylic anhydride 

Downstream Products

• 10354-43-5 thiophene-2-carboxylic acid benzylamide 
• 56966-27-9 diphenyl(thiophen-2-yl)phosphine oxide 
• 58042-63-0 2-(p-tolylsulfanyl)thiophene 
• 89942-95-0 4-methyl-2-(2-thienyl)-thiazole 
• 96461-08-4 5-phenyl-2-(thiophen-2-yl)thiazole 
• 42140-95-4 2-(thiophen-2-yl)thiazole 
• 6846-13-5 N-phenyl-2-thiophenecarboxamide 
• 833-50-1 2-phenylbenzo[d]oxazole 
• 97035-10-4 C₁₃H₁₁NO₃S 
• 97034-91-8 2-thienyl 2'-hydroxyphenyl ketone oxime 
• 20409-64-7 (2-hydroxyphenyl)(thiophen-2-yl)methanone 

Relevant academic research and scientific papers

Conversion of esters to thioesters under mild conditions

We report conversion of esters to thioestersviaselective C-O bond cleavage/weak C-S bond formation under transition-metal-free conditions. The method is notable for a general and practical transition-metal-free system, broad substrate scope and excellent functional group tolerance. The strategy was successfully deployed in late-stage thioesterification, site-selective cross-coupling/thioesterification/decarbonylation and easy-to-handle gram scale thioesterification. Selectivity and computational studies were performed to gain insight into the formation of weak C-S bonds by C-O bond cleavage, which contrasts with the traditional trend of nucleophilic additions to carboxylic acid derivatives.

Transition-Metal-Free DMAP-Mediated Aromatic Esterification of Amides with Organoboronic Acids

A new, transition-metal-free, effective method for aromatic esterification of amides with organoboronic acids has been developed. A wide range of benzoate derivatives were obtained with yields ranging from moderate to good. The catalytic reaction shows a broad substrate scope and excellent functional group tolerance. Conceptually, DMAP mediates the reaction and is crucial for this transformation.

Hydrogen-bond-assisted transition-metal-free catalytic transformation of amides to esters

The amide C-N cleavage has drawn a broad interest in synthetic chemistry, biological process and pharmaceutical industry. Transition-metal, luxury ligand or excess base were always vital to the transformation. Here, we developed a transition-metal-free hydrogen-bond-assisted esterification of amides with only catalytic amount of base. The proposed crucial role of hydrogen bonding for assisting esterification was supported by control experiments, density functional theory (DFT) calculations and kinetic studies. Besides broad substrate scopes and excellent functional groups tolerance, this base-catalyzed protocol complements the conventional transition-metal-catalyzed esterification of amides and provides a new pathway to catalytic cleavage of amide C-N bonds for organic synthesis and pharmaceutical industry. [Figure not available: see fulltext.]

Palladium-Catalyzed Aerobic Oxidative Coupling of Amides with Arylboronic Acids by Cooperative Catalysis

The first fluoride and palladium co-catalyzed conversion of amide to ester through an aerobic oxidative coupling pathway is reported. This new approach presents a practical process that employs easily available oxygen and commercially available arylboronic acids as coupling partners, uses a wide range of N- tosylamides, and proceeds under mild reaction conditions. This protocol demonstrates broad functional group tolerance, and provides an alternative option to synthesize esters from N-tosylamides which obtained by simply N-functionalization of secondary amides.

Nickel-Catalyzed Cross-Coupling of Aryl Redoxactive Esters with Aryl Zinc Reagents

A nickel-catalyzed aryl-aroyloxyl C(sp2)-O radical cross-coupling reaction conducted using a redox active ester with aryl zinc reagent was developed. This method demonstrates a new disconnection approach for formation of aryl aryl esters. In the one-pot sequential process, the readily available aryl carboxylic acids can be converted into functionalized aryl aryl esters and heteroaryl esters. This protocol is amenable to the gram-scale synthesis. The present method has a wide substrate scope and high functional group tolerance.

Enol Ester Intermediate Induced Metal-Free Oxidative Coupling of Carboxylic Acids and Arylboronic Acids

A facile, efficient and environmentally friendly methodology for the preparation of phenolic esters is realized via metal-free coupling of carboxylic acids and arylboronic acids. This sequential one pot reaction, employing methyl propiolate as an activating reagent, proceeds through the formation of enol ester intermediate, followed by a nucleophilic attack on the C-O bond under the oxidation of hydrogen peroxide. These studies display that enol esters, despite previously being overlooked as synthetic intermediates, would be the valuable building blocks for developing carbon–carbon and carbon–heteroatom bond-forming reactions.

Transesterification of (hetero)aryl esters with phenols by an Earth-abundant metal catalyst

Readily available and inexpensive Earth-abundant alkali metal species are used as efficient catalysts for the transesterification of aryl or heteroaryl esters with phenols which is a challenging and underdeveloped transformation. The simple conditions and the use of heterogeneous alkali metal catalyst make this protocol very environmentally friendly and practical. This reaction fills in the missing part in transesterification reaction of phenols and provides an efficient approach to aryl esters, which are widely used in the synthetic and pharmaceutical industry.

Method of coupling, and the coupling method using the aromatic group-substituted heterocyclic compound

Provided is an easy method (coupling method) capable of easily synthesizing a compound group in which aromatic molecules and aromatic molecules are coupled, a compound group in which aromatic molecules and alkene molecules are coupled, and the like without producing halogen waste and without the need to use scarce and expensive palladium. A compound (A) shown by general formula (A): Ar-H and a compound (B1) shown by general formula (B1): RaOCO-Ar', a compound (B2) shown by general formula (B2): RbCH=C(Ar")2, or a compound (B3) shown by general formula (B3): RcOCOCH=C(Ar")2 are reacted in the presence of a nickel compound.

Reactions of aryl 5-substituted-2-thiophenecarboxylates promoted by 4-Z-C6H4O-/4-Z-C6H4OH in 20 mol % DMSO(aq). Effect of nucleophile on acyl-transfer reaction

Nucleophilic substitution reactions of 5-XC4H2(S)C(O)OC6H3-2-Y-4-NO2 (1) promoted by 4-Z-C6H4O-/4-Z-C6H4OH in 20 mol % dimethyl sulfoxide (DMSO)(aq) have been studied kinetically. The reactions exhibited second-order kinetics with βacyl = -2.52 to -2.83, ρ(x) = 2.81-3.16, βnuc = 0.88-0.04 and βlg = -0.94, respectively. The results have been interpreted with an addition-elimination mechanism in which the nucleophilic attack occurs in the rate-determining step. Comparison with existing data reveals that the ratedetermining step changes from the second to the first step by the change in the nucleophile from R2NH/R2NH2+ to 4-Z-C6H4O-/4-Z-C6H4OH.

Ligand-free palladium-catalyzed aerobic oxidative coupling of carboxylic anhydrides with arylboronic acids

We report a new, effective and environmentally friendly protocol for selective aerobic oxidative coupling of arylboronic acids with carboxylic anhydrides in the presence of ligand-free palladium catalyst. The aryl benzoates are obtained in good to excellent yields.