Day: November 29, 2022

Yang, Ya-Jun published the artcileDesign, synthesis and biological evaluation of dipeptides as novel non-covalent 20S proteasome inhibitors, Related Products of isoquinoline, the main research area is dipeptide proteasome inhibitor synthesis biol evaluation; 20S proteasome inhibitors; dipeptides; non-covalent.

Based on the interaction modes of the natural 20S proteasome inhibitors , we have previously discovered a dipeptide . To explore the SAR around compound , we designed and synthesized a series of dipeptides () with a fragment-based strategy. Among them, nine compounds showed significant inhibitory activities against the chymotrypsin-like activity of human 20S proteasome with IC50 values at the submicromolar level, which were comparable or even superior to the parent compound Meanwhile, they displayed no significant inhibition against trypsin-like and caspase-like activities of 20S proteasome. The results suggested the feasibility to design dipeptides as novel and potent 20S proteasome inhibitors.

Journal of Asian Natural Products Research published new progress about Cation-pi interaction. 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

Yan, Jiahang published the artcileEnantioselective direct vinylogous Michael addition for constructing enantioenriched γ,γ-dialkyl substituted butyrolactams and octahydroindoles, Computed Properties of 104-01-8, the main research area is dialkyl substituted butyrolactam octahydroindole preparation Michael addition.

A nickel(II)-catalyzed asym. direct vinylogous Michael addition of γ-alkyl monosubstituted α,β-unsaturated butyrolactams to α,β-unsaturated carbonyl compounds has been disclosed, affording γ,γ-dialkyl substituted butyrolactams in good yields and satisfactory enantioselectivities. A tandem catalytic asym. vinylogous Michael addition/intramol. Michael addition has also been developed based on this reaction, which enabled the construction of enantioenriched octahydroindoles with three consecutive stereogenic carbon centers.

Organic & Biomolecular Chemistry published new progress about Cascade rearrangement. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Computed Properties of 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Baranov, Vladimir V. published the artcileA first synthesis of 8- and 8,10-substituted barbiturils and their thio analogues, Recommanded Product: 1-Methylurea, the main research area is barbituril preparation; alkyl urea formaldehyde barbituric acid multicomponent condensation.

Multicomponent condensations of alkyl(thio)ureas R1NHC(=X)NHR2 (R1 = Me, Et; R2 = H, Me, Et; X = O, S), formaldehyde and (thio)barbituric acids as 1,3-diazinane-2,4,6-trione, 2-sulfanylidene-1,3-diazinane-4,6-dione afford new spiro heterocyclic compounds, I (Y = O, S) viz., 8- and 8,10-substituted 2,4,8,10-tetraazaspiro[5.5]undecane-1,3,5,9-tetraones (barbiturils) and their thio analogs.

Mendeleev Communications published new progress about Condensation reaction. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Recommanded Product: 1-Methylurea.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Qin, Ling-yan published the artcileAn improved and practical synthesis of Fmoc Rink linker, HPLC of Formula: 151-10-0, the main research area is solid phase peptide synthesis Fmoc Rink linker solvent effect; hydroxybenzaldehyde ethyl bromoacetate oxidation Friedel Crafts acylation Lewis acid; hydrolysis reductive amination hydroxylamine hydrogenation zinc catalyst condensation fluorenylmethoxycarbonyl.

Fmoc Rink linker (Fmoc = 9-fluorenylmethoxycarbonyl) is a widely used peptide-resin linker in the solid-phase synthesis of peptide-amides. This paper describes an improved and practical eight-step synthetic approach for this compound in a 50% overall yield, using p-hydroxybenzaldehyde as the starting material. The procedure is operationally simple and amenable to scale-up synthesis.

Journal of Chemical Research published new progress about Condensation reaction. 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

Dastjerdi, Neda Mollakarimi published the artcileUltrasound-promoted green approach for the synthesis of multisubstituted pyridines using stable and reusable SBA-15@ADMPT/H5PW10V2O40 nanocatalyst at room temperature, SDS of cas: 86-51-1, the main research area is silica ADMPT nanocatalyst pyridine synthesis room temperature.

A facile one-pot protocol for the synthesis of 2-amino-3-cyanopyridins using SBA-15@Triazine/H5PW10V2O40 as an efficient catalyst under ultrasonic conditions has been developed. The nanohybrid catalyst was prepared by the chem. anchoring of Keggin heteropolyacid H5PW10V2O40 onto the surface of SBA-15 mesoporous silica modified with 2-APTS -4,6-bis(3,5-dimethyl-1H-pyrazol- 1-yl)-1,3,5-triazine (ADMPT) linker. Then the nanohybrid was used as a green, efficient, eco-friendly, and highly recyclable catalyst for the one-pot and multi-component synthesis of 2-amino-3-cyanopyridin derivatives from the reaction of aldehydes, malononitrile, cyclic ketones and ammonium acetate under ultrasound waves with good to excellent yields (79-95%) and in a short span of time. This nanocatalyst was characterized by using FT-IR, XRD, SEM, TEM, BET, and EDX techniques.

Green Chemistry Letters and Reviews published new progress about Condensation reaction. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, SDS of cas: 86-51-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Peng, Panpan published the artcileSynthesis of energetic salts containing three heterocyclic anions by a one-pot condensation reaction, Formula: C2H5N5, the main research area is energetic salt heterocyclic anion preparation one pot reaction safety.

Heterocyclic energetic salts are extensively used in energetic materials due to their excellent mol. designability. Generally, most inorganic or organic anionic energetic ionic salts contain only one anion or two anions at most. Thus far, energetic ion salts containing three organic energetic anions have not been reported. In this study, we develop a new method for the preparation of energetic ion salts containing three heterocyclic anions via a one-step one-pot condensation reaction. The proposed strategy is based on aldehydes, aminoguanidine salts, and heterocyclic energetic ionic salts. In this work, energetic salt 1 containing three 5-nitrotetrazole anions and energetic salt 2 containing three 3,5-dinitro-1,2,4-triazole anions were successfully synthesized. The results of NMR, IR, and MS proved that the products (1 and 2) contain three heterocyclic anions. The energetic test results indicate that products 1 and 2 have extremely high decomposition temperatures (250 °C and 308 °C) and exhibit low sensitivities (for both 1 and 2, FS > 360 N, IS > 40 J). Meanwhile, their detonation velocities (7306 m s-1 and 7375 m s-1) and detonation pressures (18.3 GPa and 19.7 GPa) are better than those of TNT. This indicates that 1 and 2 have great potential to be applied as heat-resistant insensitive explosives. In addition, the X-ray diffraction results of the non-energetic, p-toluenesulfonic acid anions of product 3 not only further verify the structure of the three heterocyclic anions mentioned above, but also confirm the universality of this method.

New Journal of Chemistry published new progress about Condensation reaction. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Formula: C2H5N5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Peng, Panpan published the artcileSynthesis of energetic salts containing three heterocyclic anions by a one-pot condensation reaction, Application of 3,5-Diamino-1,2,4-triazole, the main research area is energetic salt heterocyclic anion preparation one pot reaction safety.

Heterocyclic energetic salts are extensively used in energetic materials due to their excellent mol. designability. Generally, most inorganic or organic anionic energetic ionic salts contain only one anion or two anions at most. Thus far, energetic ion salts containing three organic energetic anions have not been reported. In this study, we develop a new method for the preparation of energetic ion salts containing three heterocyclic anions via a one-step one-pot condensation reaction. The proposed strategy is based on aldehydes, aminoguanidine salts, and heterocyclic energetic ionic salts. In this work, energetic salt 1 containing three 5-nitrotetrazole anions and energetic salt 2 containing three 3,5-dinitro-1,2,4-triazole anions were successfully synthesized. The results of NMR, IR, and MS proved that the products (1 and 2) contain three heterocyclic anions. The energetic test results indicate that products 1 and 2 have extremely high decomposition temperatures (250 °C and 308 °C) and exhibit low sensitivities (for both 1 and 2, FS > 360 N, IS > 40 J). Meanwhile, their detonation velocities (7306 m s-1 and 7375 m s-1) and detonation pressures (18.3 GPa and 19.7 GPa) are better than those of TNT. This indicates that 1 and 2 have great potential to be applied as heat-resistant insensitive explosives. In addition, the X-ray diffraction results of the non-energetic, p-toluenesulfonic acid anions of product 3 not only further verify the structure of the three heterocyclic anions mentioned above, but also confirm the universality of this method.

New Journal of Chemistry published new progress about Condensation reaction. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Application of 3,5-Diamino-1,2,4-triazole.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bakibaev, Abdigali A. published the artcileSynthesis of glycolurils and hydantoins by reaction of urea and 1, 2-dicarbonyl compounds using etidronic acid as a “”green catalyst””, Formula: C2H6N2O, the main research area is glycoluril green preparation; hydantoin green preparation; urea dicarbonyl compound condensation etidronic acid catalyst.

A new, rather simple and efficient method for the synthesis of a number of glycoluryls I [R1 = H, Me; R2 = H, Me; R3 = H, Me, Ph; R4 = H, Me, Ph] and hydantoins II [R5 = H, Me] in water using a etidronic acid (HEDP) as green catalyst was developed. So, for the first time, the condensation reaction of ureas with 1,2-dicarbonyl compounds was carried out in the presence of HEDP. Also based on NMR studies, a chemism of these reactions, which is stepwise, was proposed. The remaining aqueous filtrate containing HEDP after the reaction could be reused for other cycles synthesis of glycoluril and other compounds, because HEDP was not converted during the reaction.

Journal of Heterocyclic Chemistry published new progress about Condensation reaction. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Formula: C2H6N2O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yang, Ya-Jun published the artcileDesign, synthesis and biological evaluation of dipeptides as novel non-covalent 20S proteasome inhibitors, Related Products of isoquinoline, the main research area is dipeptide proteasome inhibitor synthesis biol evaluation; 20S proteasome inhibitors; dipeptides; non-covalent.

Based on the interaction modes of the natural 20S proteasome inhibitors , we have previously discovered a dipeptide . To explore the SAR around compound , we designed and synthesized a series of dipeptides () with a fragment-based strategy. Among them, nine compounds showed significant inhibitory activities against the chymotrypsin-like activity of human 20S proteasome with IC50 values at the submicromolar level, which were comparable or even superior to the parent compound Meanwhile, they displayed no significant inhibition against trypsin-like and caspase-like activities of 20S proteasome. The results suggested the feasibility to design dipeptides as novel and potent 20S proteasome inhibitors.

Journal of Asian Natural Products Research published new progress about Cation-pi interaction. 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