Author: Jessica.F

McElvain, S. M.; Clarke, Robert L. published the artcile< Ketene acetals. XVIII. Pentaethoxyethane and tetraethoxyethylene (diethoxyketene diethyl acetal)>, Recommanded Product: 2,2-Diethoxyacetonitrile, the main research area is .

Because Scheibler (C.A. 20, 2824) has reported that tetraethoxyethylene (diethoxyketene di-Et acetal) (I) dissociate spontaneously into C(OEt)2, an unequivocal synthesis of I was desirable. (EtO)2CHCO2Et (II) yields 84% (EtO)2CHCONH2 (III) and this with Et3N gives 76-9% (EtO)2CHCN (IV). By the method of M. and Nelson (C.A. 36, 5772.3) IV yields 66-71% (EtO)2CHC(OEt):NH2Cl (V); addition of 23.3 g. V to 30.6 g. K2CO3 in 40 ml. H2O (covered with 60 ml. ether) at -5° and shaking 1 min. give 80% Et diethoxyacetimidate (VI), b20 91-2°, nD25 1.4147, d425 0.957. VI (47.5 g.) and 104 g. absolute EtOH, kept 4 days at room temperature, give 42% NH4Cl; the remainder of the N was recovered as III; when the alc. solution was distilled, the only products isolated were a small quantity of ether and 26% II; however, if the alc. filtrate was made alk. (to phenolphthalein) with EtONa before heat was applied, there were formed 8% II, 44% III, 8% V, and 12% Et diethoxyorthoacetate (pentaethoxyethane) (VII), b8 85-6°, b. 205-7°, nD25 1.4072, d425 0.935. VII (4.7 g.), added (10 min.) to 0.08 mole EtNa in petr. ether in a N atm., gives 39% I, b5 70-1°, b740 195-6°, nD25 1.4213, d425 0.949; it shows no tendency to dissociate With EtOH I gives VII; with Br it yields (CO2Et)2 and, presumably, EtBr. (CONH2)2 m. 350° (decomposition, Cu block) or decompose 340° in a sealed tube; Michael (Ber. 28, 1632 (1895)) reported a m.p. of 417-19° (decomposition).

Journal of the American Chemical Society published new progress about 6136-93-2. 6136-93-2 belongs to class nitriles-buliding-blocks, and the molecular formula is C6H11NO2, Recommanded Product: 2,2-Diethoxyacetonitrile.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Zhang, Ya-Kai; Wang, Bin published the artcile< Synthesis of α-Ketoamides from β-Ketonitriles and Primary Amines: A Catalyst-Free Oxidative Decyanation-Amidation Reaction>, Reference of 21667-62-9 , the main research area is ketoamide preparation; ketonitrile amine decyanation amidation.

AN oxidative decyanation-amidation of β-ketonitriles and primary amines readily occurs using hydrogen peroxide sodium carbonate adduct (Na2CO3·1.5H2O2), K2CO3, and 1,4-dioxane. This reaction affords α-ketoamides under mild conditions without the need of a catalyst.

European Journal of Organic Chemistry published new progress about Amidation. 21667-62-9 belongs to class nitriles-buliding-blocks, and the molecular formula is C9H6ClNO, Reference of 21667-62-9 .

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Sheng, Cheng; Ling, Zheng; Ahmad, Tanveer; Xie, Fang; Zhang, Wanbin published the artcile< Copper-Catalyzed Regioselective [3+3] Annulations of Alkynyl Ketimines with α-Cyano Ketones: the Synthesis of Polysubstituted 4H-Pyran Derivatives with a CF3-Containing Quaternary Center>, Computed Properties of 21667-62-9 , the main research area is trifluoromethyl pyran preparation regioselective enantioselective; alkynyl ketimine cyano ketone ring closing reaction copper catalyst; [3+3] annulations; copper catalyzed; polysubstituted 4H-pyran derivatives.

Regioselective [3+3] annulation of alkynyl ketimines R1CCC(=NR)(CF3) (R1 = benzyl, naphthalen-1-yl, triethylsilyl, etc.; R = Boc) with α-cyano ketones R2C(O)CH2CN (R2 = Et, 4-methylphenyl, thiophen-2-yl, etc.) for the synthesis of polysubstituted 4H-pyran derivatives I with a quaternary CF3-containing center has been realized by using Cu(OAc)2 as the catalyst. The novel strategy tolerates a wide range of α-CF3 alkynyl ketimines and α-cyano ketones with both aryl and alkyl substituents. A preliminary asym. synthesis of chiral product II (R3 = Ph, 4-MeC6H4, 4-ClC6H4, etc.; R4 = Boc, Cbz) has been attempted by using copper and chiral thiourea as the cocatalyst with excellent yields (86-99%) and good enantioselectivities (71-78% ee). Furthermore, product I (R = Boc; R1 = R2 = Ph) could be obtained on a gram-scale reaction with 75% yield and 99% ee after recrystallization Several products were also transformed readily. Control experiments indicate that the reaction involves a process with a base-catalyzed or chiral thiourea-catalyzed Mannich-type reaction followed by a highly regioselective copper-catalyzed ring-closing reaction on the alkynyl moiety in a 6-endo-dig fashion.

Chemistry – A European Journal published new progress about [3+3] Cycloaddition reaction (regio-, stereoselective). 21667-62-9 belongs to class nitriles-buliding-blocks, and the molecular formula is C9H6ClNO, Computed Properties of 21667-62-9 .

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Zhang, Lei; Rogers, Bruce N.; Duplantier, Allen J.; McHardy, Stanley F.; Efremov, Ivan; Berke, Helen; Qian, Weimin; Zhang, Andy Q.; Maklad, Noha; Candler, John; Doran, Angela C.; Lazzaro, John T.; Ganong, Alan H. published the artcile< 3-(Imidazolylmethyl)-3-aza-bicyclo[3.1.0]hexan-6-yl)methyl ethers: A novel series of mGluR2 positive allosteric modulators>, Application In Synthesis of 6136-93-2, the main research area is imidazolylmethylazabicyclohexanol ether preparation metabotropic glutamate receptor modulator.

The synthesis and structure-activity relationship of a novel series of 3-(imidazolylmethyl)-3-azabicyclo[3.1.0]hexan-6-ylmethyl ethers, derived from a high throughput screening, are described. Subsequent optimization led to identification of potent, metabolically stable and orally available mGluR2 pos. allosteric modulators.

Bioorganic & Medicinal Chemistry Letters published new progress about Metabotropic glutamate receptor 2 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 6136-93-2 belongs to class nitriles-buliding-blocks, and the molecular formula is C6H11NO2, Application In Synthesis of 6136-93-2.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Chatterjee, Arpita; Murmu, Chudamani; Peruncheralathan, S. published the artcile< Copper-catalysed N-arylation of 5-aminopyrazoles: a simple route to pyrazolo[3,4-b]indoles>, Recommanded Product: 2-(2-Bromo-5-fluorophenyl)acetonitrile, the main research area is phenylaminopyrazole preparation copper catalyst arylation; phenyl pyrazoloindole preparation.

A copper-catalyzed intramol. N-arylation of 5-aminopyrazoles is demonstrated for the first time. Highly substituted pyrazolo[3,4-b]indoles were synthesized. In particular, the indole core was decorated with halogens and alkyl and methoxy groups. Furthermore, a selective N-arylation of unsym. diaryl bromide containing pyrazoles was exemplified, resulting in valuable pyrazolo[1,5-a]benzimidazoles.

Organic & Biomolecular Chemistry published new progress about Aryl bromides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 886761-96-2 belongs to class nitriles-buliding-blocks, and the molecular formula is C8H5BrFN, Recommanded Product: 2-(2-Bromo-5-fluorophenyl)acetonitrile.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Val, Cristina; Rodriguez-Garcia, Carlos; Prieto-Diaz, Ruben; Crespo, Abel; Azuaje, Jhonny; Carbajales, Carlos; Majellaro, Maria; Diaz-Holguin, Alejandro; Brea, Jose M.; Loza, Maria Isabel; Gioe-Gallo, Claudia; Contino, Marialessandra; Stefanachi, Angela; Garcia-Mera, Xerardo; Estevez, Juan C.; Gutierrez-de-Teran, Hugo; Sotelo, Eddy published the artcile< Optimization of 2-Amino-4,6-diarylpyrimidine-5-carbonitriles as Potent and Selective A1 Antagonists>, Quality Control of 21667-62-9 , the main research area is amino diarylpyrimidin carbonitrile preparation adenosine receptor SAR docking.

Herein, document of a large collection of 108 2-amino-4,6-disubstituted-pyrimidine derivatives as potent, structurally simple, and highly selective A1AR ligands. The most attractive ligands were confirmed as antagonists of the canonical cyclic adenosine monophosphate pathway, and some pharmacokinetic parameters were preliminarilly evaluated. The library, built through a reliable and efficient three-component reaction, comprehensively explored the chem. space allowing the identification of the most prominent features of the structure-activity and structure-selectivity relationships around this scaffold. These included the influence on the selectivity profile of the aromatic residues at positions R4 and R6 of the pyrimidine core but most importantly the prominent role to the unprecedented A1AR selectivity profile exerted by the Me group introduced at the exocyclic amino group. The structure-activity relationship trends on both A1 and A2AARs were conveniently interpreted with rigorous free energy perturbation simulations, which started from the receptor-driven docking model that guided the design of these series.

Journal of Medicinal Chemistry published new progress about Adenosine A1 receptor antagonists. 21667-62-9 belongs to class nitriles-buliding-blocks, and the molecular formula is C9H6ClNO, Quality Control of 21667-62-9 .

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Abel-Snape, Xavier; Wycich, Gina; Lautens, Mark published the artcile< Synthesis of Indenes and Benzofulvenes via a Palladium-Catalyzed Three-Component Reaction>, Category: nitriles-buliding-blocks, the main research area is indene benzofulvene preparation palladium catalyst three component reaction.

A palladium-catalyzed three-component domino reaction to access indene derivatives is reported. This reaction proceeds via the sequential formation of three bonds: the first two resulting from inter- and intramol. carbopalladation and the final bond arising from an attack by a terminating nucleophilic reagent. Modifying the starting tether on the iodoarene led to either indenes or benzofulvenes. Three termination variations were compatible with this sequence, which furnished products in moderate to good yields. The oxabicycle used in this work acts as an acetylene surrogate, which is revealed in a postcatalytic retro-Diels-Alder step. A diastereomerically enriched mixture of oxabicyclic derivatives allowed for preliminary results for the enantioselective synthesis of indenes.

ACS Catalysis published new progress about Alkenynes Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 38487-85-3 belongs to class nitriles-buliding-blocks, and the molecular formula is C8H8N2O, Category: nitriles-buliding-blocks.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Song, Jian; Zheng, Wen-Hua published the artcile< A highly enantioselective approach towards optically active γ-amino alcohols by tin-catalyzed kinetic resolution of 1,3-amino alcohols>, Computed Properties of 21667-62-9, the main research area is benzoyl amino alc preparation enantioselective tin; amino alc benzyl chloride acylation kinetic resolution.

A highly enantioselective kinetic resolution of racemic 1,3-amino alcs. via O-acylation was achieved using a chiral organotin as the catalyst. Alkyl- and aryl-substituted 1,3-amino alcs. were resolved with excellent efficiencies to afford the recovered 1,3-amino alcs. and acylative products with high enantioselectivities, with s factors up to >600. Notably, the chiral organotin catalyst was more selective for anti-1,3-amino alcs. than for syn-isomers. A Gram-scale reaction with loading using 2 mol% catalysts demonstrated the utility of this protocol.

Chemical Communications (Cambridge, United Kingdom) published new progress about Acylation. 21667-62-9 belongs to class nitriles-buliding-blocks, and the molecular formula is C9H6ClNO, Computed Properties of 21667-62-9.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Wan, Bin; Lu, Zhuoer; Wu, Zhuo; Cheng, Cang; Zhang, Yanghui published the artcile< Diastereoselective Construction of Eight-Membered Carbocycles through Palladium-Catalyzed C(sp3)-H Functionalization>, COA of Formula: C8H5BrFN, the main research area is alkylphenyl bromide biphenylene palladium catalyst diastereoselective cross coupling reaction; dihydrotribenzoannulene preparation.

A palladium-catalyzed cross-coupling reaction of 2-alkylphenyl bromides with biphenylene was developed. The reactions formed eight-membered carbocycles through C(sp3)-H activation and the formation of two C-C bonds, and the chiral products were obtained with excellent diastereoselectivity. The reaction provided a new strategy for the construction of eight-membered carbocycles, and the products represent a novel type of chiral scaffold.

Organic Letters published new progress about Aryl bromides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 886761-96-2 belongs to class nitriles-buliding-blocks, and the molecular formula is C8H5BrFN, COA of Formula: C8H5BrFN.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Scheibler, Helmuth; Beiser, Willy; Cobler, Heinz; Schmidt, Anton published the artcile< Compounds of bivalent carbon. VIII. Some derivatives of diethoxyacetic acid and their adaptation to carbon monoxide acetal cleavage>, COA of Formula: C6H11NO2, the main research area is .

In the reaction between (EtO)2CHCO2Et and NaOEt or Et2NMgBr the C(OEt)2 formed by the cleavage of the C chain readily reacts with the EtOH which is split off simultaneously, forming pentaethoxyethane and heptaethoxypropane. Since the sec. NHEt2, is indifferent toward C(OEt)2, attempts were made to prepare dialkylamides of (EtO)2CHCO2H for use instead of (EtO)2CHCO2Et for the C(OEt)2 cleavage. These dialkylamides cannot be prepared under the usual conditions but (EtO)2CHCONMe2 (I) was finally obtained by heating the components in a sealed tube at 100° in the presence of CaCl2 to bind the EtOH set free, and (EtO)2CHCON(CH2Ph)2 (II) was obtained from (EtO)2CHCO2Et and (PhCH2)2NMgBr in boiling C6H6. When I and II were treated with Me2NMgBr and (PhCH2)2NMgBr, resp., and, after removal of the ether (both that used as solvent and the ether of constitution), the products were subjected to dry distillation in vacuo, the product obtained from Me2NMgBr yielded a compound m. 134° containing no trace of EtO (Zeisel) and giving NH3 instead of NHMe2 on hydrolysis. Analysis indicated that it was OHCCONH2.3H2O, and from the low-boiling products of the reaction (condensed in liquid air) was isolated Et2O after removal of the NHMe2 with C6H4(CO)2O in the presence of quinoline. In the experiment with II there was obtained no low-boiling distillate; the product was N(CH2Ph)3. formed according to the scheme (EtO)2CHC(OMgBr)[N(CH2Ph)2]2 → N(CH2Ph)3 + (EtO)2CHC(OMgBr):NCH2Ph. These dialkylamides are therefore not adapted to the C(OEt)2 cleavage. As (EtO)2CHCO2Et can be used for this purpose but the EtOH formed simultaneously gives rise to secondary reactions, attempts were made to prepare the Ph instead of the Et ester. (EtO)2CHCOCl cannot be made because 1 of the 2 EtO groups in (EtO)2CHCO2H immediately reacts with PCl5 or SOCl2. The Ph ester can be obtained by treating the acid in the presence of excess of pyridine first with SOCl2 and then with PhOH, but the. ester so prepared is difficultly purified. Favorable results were obtained only when ClSO2Ph was used with the acid in ether in the presence of pyridine, the resulting (EtO)2CHCOOSO2Ph decomposing on heating in ether into SO2 and (EtO)2CHCO2Ph. As the ester is very sensitive to acids it was freed from admixed pyridine with MeI. With Et2NMgBr the ester gave (EtO)2CHCONEt2 but the chief product was a non-distillable mass which decomposed at higher temperatures and was perhaps formed by combination of PhOH with a polymerization product of C(OEt)2. Furthermore, in the part of the product consisting chiefly of NHEt2, monomeric C(OEt)2 was detected and determined by means of HgCl2 after it had been hydrolyzed to HCO2H with dilute alkali. Diethoxyacetdimethylamide (I), b12 105°; yield, 50.5%. Dibenzylamide (II), light yellow, b1 168-70° (yield, 26%). Ph diethoxyacetate, b13 150-2°; yield, 61.1%. Diethoxyacetonitrile, obtained in 30% yield from the amide in quinoline slowly treated at 90° with P2O6, b12 55-6°.

Berichte der Deutschen Chemischen Gesellschaft [Abteilung] B: Abhandlungen published new progress about 6136-93-2. 6136-93-2 belongs to class nitriles-buliding-blocks, and the molecular formula is C6H11NO2, COA of Formula: C6H11NO2.

Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts