Tag: M.W=150-200

Hu, Ying published the artcileCsp³-H monofluoroalkenylation via stereoselective C-F bond cleavage, Formula: C11H15NO2, the publication is Chemical Communications (Cambridge, United Kingdom) (2022), 58(16), 2734-2737, database is CAplus and MEDLINE.

A practical nickel- and photoredox-catalyzed Csp³-H monofluoroalkenylation through chelation-assisted Csp²-F bond cleavage of gem-difluoroalkenes for the synthesis of stereodefined tetrasubstituted fluoroalkenes were developed. Moreover, the gem-difluoroalkenes could also undergo photoredox-catalyzed cascade twofold C-F diaminomethylation.

Chemical Communications (Cambridge, United Kingdom) published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Formula: C11H15NO2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zeng, Li-Yan published the artcileO-Methylation of carboxylic acids with streptozotocin, Quality Control of 103-26-4, the publication is Organic & Biomolecular Chemistry (2022), 20(26), 5230-5233, database is CAplus and MEDLINE.

The clin. used DNA-alkylating drug streptozotocin (STZ) was investigated using a simple work-up as an O-methylating agent to transform various carboxylic acids RC(O)OH (R = 2-phenylethenyl, 2-(4-chlorophenyl)ethenyl, 3-(1H-indol-3-yl)propyl, etc.), sulfonic acids R¹S(O)₂OH (R¹ = Ph, 4-methoxyphenyl, 4-chlorophenyl) and phosphorus acids (R²)₂P(O)OH (R² = Ph, OPh) into corresponding Me esters RC(O)OMe, R¹S(O)₂OMe, (R²)₂P(O)OMe and obtained with yields of up to 97% in 4 h at room temperature Good substrate tolerance was observed, and benefited from the mild conditions and compatibility of the reaction with water.

Organic & Biomolecular Chemistry published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C8H6N2O3, Quality Control of 103-26-4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Wang, Amu published the artcileRegioselective Synthesis of Pyrazolo[1,5-a]pyridine via TEMPO-Mediated [3 + 2] Annulation-Aromatization of N-Aminopyridines and α,β-Unsaturated Compounds, Recommanded Product: Methyl 3-phenyl-2-propenoate, the publication is Organic Letters (2022), 24(7), 1454-1459, database is CAplus and MEDLINE.

A TEMPO-mediated [3 + 2] annulation-aromatization protocol for the preparation of pyrazolo[1,5-a]pyridines from N-aminopyridines and α,β-unsaturated compounds were developed. The procedure offered multisubstituted pyrazolo[1,5-a]pyridines in good to excellent yield with high and predictable regioselectivity. The modification of marketed drugs including Loratadine, Abiraterone and Metochalcone, a one-pot three-step gram scale synthesis of key intermediate for the preparation of Selpercatinib were demonstrated. Mechanism studies showed that TEMPO served both as a Lewis acid and as an oxidant.

Organic Letters published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C3H6O2, Recommanded Product: Methyl 3-phenyl-2-propenoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Liu, Hong-Yan published the artcileThe chemical, sensory, and volatile characteristics of instant sweet tea (Lithocarpus litseifolius [Hance] Chun) using electronic nose and GC-MS-based metabolomics analysis, Application of Dimethyl adipate, the publication is LWT–Food Science and Technology (2022), 113518, database is CAplus.

This study aims to investigate the effect of instant tea processing on the chem., sensory, and volatile profiles of sweet tea. Young leaves of Lithocarpus litseifolius [Hance] Chun were extracted and dried with freeze-drying and spray-drying, resp. The contents of proteins, polysaccharides, total phenolics, total flavonoids, and free amino acids in instant teas were found to be higher than those in sweet tea. A total of 268 volatiles were identified by HS-SPME-GC-MS, and 88 compounds showed significant differences among different samples, and most of volatile compounds showed lower concentrations in instant tea powder than sweet tea powder. Nine aroma attributes were evaluated through descriptive sensory anal. Sweet tea had a higher intensity of woody, green, floral, fruity, and sweet descriptor, while the instant sweet teas demonstrated the higher intensity of caramel-like attribute. Our study emphasized the nutritive value of instant sweet tea, while the aroma needs to be improved further.

LWT–Food Science and Technology published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Application of Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Feng, Yunchao published the artcileHighly dispersed Co/N-rich carbon nanosheets for the oxidative esterification of biomass-derived alcohols: Insights into the catalytic performance and mechanism, Quality Control of 103-26-4, the publication is Journal of Catalysis (2021), 148-155, database is CAplus.

Developing the active and environmentally friendly non-noble nano-catalysts is highly desired to transform biomass-derived platform into value chems. Herein, we report a low-cost and sustainable cobalt/nitrogen-doped carbon catalyst containing both metallic Co and Co-N components exhibits satisfying activity for the oxidative esterification of 5-hydroxymethylfurfural and other investigated alcs. in methanol without the base additive under mild conditions. Exptl. results show that an appropriate ratio of Co to Co-N is responsible for the high activity of the Co/Co-N/CN catalysts towards oxidative esterification. Theor. computational results demonstrate that the Co/Co-N group synergistically promotes electron transfer from the Co adatom to the surface oxygen atoms, facilitates O₂ adsorption and activation on the Co sites, and further reduces the energy barrier for the oxidation of alcs. to aldehydes, all of which contribute to the overall activity of oxidative esterification of alcs. to the corresponding esters. In addition to exhibiting superior intrinsic activity, the as-prepared Co/Co-N/CN catalyst also shows excellent stability and recyclability.

Journal of Catalysis published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Quality Control of 103-26-4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Torii, Sigeru published the artcileChemical and Electrochemical Asymmetric Dihydroxylation of Olefins in I₂-K₂CO₃-K₂OsO₂(OH)₄ and I₂-K₃PO₄/K₂HPO₄-K₂OsO₂(OH)₄ Systems with Sharpless’ Ligand, Computed Properties of 5205-11-8, the publication is Journal of Organic Chemistry (1996), 61(9), 3055-60, database is CAplus and MEDLINE.

Iodine-assisted chem. and electrochem. asym. dihydroxylation of various olefins in I₂-K₂CO₃-K₂OsO₂(OH)₄ and I₂-K₃PO₄/K₂HPO₄-K₂OsO₂(OH)₄ systems with Sharpless’ ligand provided the optically active glycols in excellent conversion yields and high enantiomeric excesses. Iodine (I₂) was used stoichiometrically for the chem. dihydroxylation, and good results were obtained with nonconjugated olefins in contrast to the case of potassium ferricyanide as a co-oxidant. The potentiality of I₂ as a co-oxidant under stoichiometric conditions has been proven to be effective as an oxidizing mediator in electrolysis systems. Iodine-assisted asym. electro-dihydroxylation of olefins in either a t-BuOH/H₂O(1/1)-K₂CO₃/(DHQD)₂PHAL-(Pt) or t-BuOH/H₂O(1/1)-K₃PO₄/K₂HPO₄/(DHQD)₂PHAL-(Pt) system in the presence of potassium osmate in an undivided cell was investigated in detail. Irresp. of the substitution pattern, all the olefins afforded the diols in high yields and excellent enantiomeric excesses. A plausible mechanism is discussed on the basis of cyclic voltammograms as well as exptl. observations.

Journal of Organic Chemistry published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C2H8Cl2N4S2, Computed Properties of 5205-11-8.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Yang, Chongzhe published the artcileTherapeutic potential of tricarboxylic acid cycle metabolite itaconate in cardiovascular diseases, Application In Synthesis of 617-52-7, the publication is EBioMedicine (2020), 102938, database is CAplus and MEDLINE.

Tricarboxylic acid cycle (TCA cycle) produces metabolites in the mitochondria under various pathophysiol. conditions. LPS and interferons induce IRG1 expression and itaconate production from the TAC cycle. Itaconate and its derivatives DI and OI contribute to (1) succinate dehydrogenase inhibition and succinate accumulation; (2) KEAP1 cysteine alkylation, Nrf2 expression and nucleus translocation, and pro- and anti-inflammatory mol. expression regulation; (3) ATF3 expression; and (4) M2 macrophage polarization. Adeno-associated virus (AAV)-mediated overexpression of Nrf2 reduced AAA growth and lesion inflammation, but shRNA-mediated Nrf2 knockdown revealed the opposite phenotypes. Instead of using the Irg1 mice to test a role for itaconate in AAA, this study used AAV-mediated KEAP1 overexpression to increase AAA growth and lesion inflammation. OI treatment reversed these KEAP1 adverse activities, likely via KEAP1 alkylation and disassocn. from Nrf2, although this study did not explore the details. This is the first study of TCA cycle metabolites in AAA that extends the concept of using OI or DI as a therapeutic regimen to slow murine and human AAA growth and associated lesion and systemic inflammation. The demonstrated beneficial effects of OI and DI in sepsis, hepatic, cerebral, and cardiac IR injuries support this potential.

EBioMedicine published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C6H4ClNO2, Application In Synthesis of 617-52-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Torii, Sigeru published the artcileChemical and Electrochemical Asymmetric Dihydroxylation of Olefins in I₂-K₂CO₃-K₂OsO₂(OH)₄ and I₂-K₃PO₄/K₂HPO₄-K₂OsO₂(OH)₄ Systems with Sharpless’ Ligand, Computed Properties of 5205-11-8, the publication is Journal of Organic Chemistry (1996), 61(9), 3055-60, database is CAplus and MEDLINE.

Iodine-assisted chem. and electrochem. asym. dihydroxylation of various olefins in I₂-K₂CO₃-K₂OsO₂(OH)₄ and I₂-K₃PO₄/K₂HPO₄-K₂OsO₂(OH)₄ systems with Sharpless’ ligand provided the optically active glycols in excellent conversion yields and high enantiomeric excesses. Iodine (I₂) was used stoichiometrically for the chem. dihydroxylation, and good results were obtained with nonconjugated olefins in contrast to the case of potassium ferricyanide as a co-oxidant. The potentiality of I₂ as a co-oxidant under stoichiometric conditions has been proven to be effective as an oxidizing mediator in electrolysis systems. Iodine-assisted asym. electro-dihydroxylation of olefins in either a t-BuOH/H₂O(1/1)-K₂CO₃/(DHQD)₂PHAL-(Pt) or t-BuOH/H₂O(1/1)-K₃PO₄/K₂HPO₄/(DHQD)₂PHAL-(Pt) system in the presence of potassium osmate in an undivided cell was investigated in detail. Irresp. of the substitution pattern, all the olefins afforded the diols in high yields and excellent enantiomeric excesses. A plausible mechanism is discussed on the basis of cyclic voltammograms as well as exptl. observations.

Journal of Organic Chemistry published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C2H8Cl2N4S2, Computed Properties of 5205-11-8.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Torii, Sigeru published the artcileChemical and Electrochemical Asymmetric Dihydroxylation of Olefins in I₂-K₂CO₃-K₂OsO₂(OH)₄ and I₂-K₃PO₄/K₂HPO₄-K₂OsO₂(OH)₄ Systems with Sharpless’ Ligand, Computed Properties of 5205-11-8, the publication is Journal of Organic Chemistry (1996), 61(9), 3055-60, database is CAplus and MEDLINE.

Iodine-assisted chem. and electrochem. asym. dihydroxylation of various olefins in I₂-K₂CO₃-K₂OsO₂(OH)₄ and I₂-K₃PO₄/K₂HPO₄-K₂OsO₂(OH)₄ systems with Sharpless’ ligand provided the optically active glycols in excellent conversion yields and high enantiomeric excesses. Iodine (I₂) was used stoichiometrically for the chem. dihydroxylation, and good results were obtained with nonconjugated olefins in contrast to the case of potassium ferricyanide as a co-oxidant. The potentiality of I₂ as a co-oxidant under stoichiometric conditions has been proven to be effective as an oxidizing mediator in electrolysis systems. Iodine-assisted asym. electro-dihydroxylation of olefins in either a t-BuOH/H₂O(1/1)-K₂CO₃/(DHQD)₂PHAL-(Pt) or t-BuOH/H₂O(1/1)-K₃PO₄/K₂HPO₄/(DHQD)₂PHAL-(Pt) system in the presence of potassium osmate in an undivided cell was investigated in detail. Irresp. of the substitution pattern, all the olefins afforded the diols in high yields and excellent enantiomeric excesses. A plausible mechanism is discussed on the basis of cyclic voltammograms as well as exptl. observations.

Journal of Organic Chemistry published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C2H8Cl2N4S2, Computed Properties of 5205-11-8.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

De Luca, Giuseppe published the artcileImpact of diabetes on clinical outcome among elderly patients with acute coronary syndrome treated with percutaneous coronary intervention: insights from the ELDERLY ACS 2 trial., Quality Control of 110-42-9, the main research area is .

BACKGROUND: Despite recent improvements in percutaneous coronary revascularization and antithrombotic therapies for the treatment of acute coronary syndromes, the outcome is still unsatisfactory in high-risk patients, such as the elderly and patients with diabetes. The aim of the current study was to investigate the prognostic impact of diabetes on clinical outcome among patients included in the Elderly-ACS 2 trial, a randomized, open-label, blinded endpoint study carried out at 32 centers in Italy. METHODS: Our population is represented by 1443 patients included in the Elderly-ACS 2 trial. Diabetes was defined as known history of diabetes at admission. The primary endpoint of this analysis was cardiovascular mortality, while secondary endpoints were all-cause death, recurrent myocardial infarction, Bleeding Academic Research Consortium type 2 or 3 bleeding, and rehospitalization for cardiovascular event or stent thrombosis within 12 months after index admission. RESULTS: Diabetes was present in 419 (29%) out of 1443 patients. Diabetic status was significantly associated with major cardiovascular risk factors and history of previous coronary disease, presentation with non-ST segment elevation myocardial infarction (P = 0.01) more extensive coronary disease (P = 0.02), more advanced Killip class at presentation (P = 0.003), use at admission of statins (P = 0.004) and diuretics at discharge (P < 0.001). Median follow-up was 367 days (interquartile range: 337-378 days). Diabetic status was associated with an absolute increase in the rate of cardiovascular mortality as compared with patients without diabetes [5.5 vs. 3.3%, hazard ratio (HR) 1.7 (0.99-2.8), P = 0.054], particularly among those treated with clopidogrel [HR (95% confidence interval (CI)) = 1.89 (0.93-3.87), P = 0.08]. However, this difference disappeared after correction for baseline differences [Adjusted HR (95% CI) 1.1(0.4-2.9), P = 0.86]. Similar findings were observed for other secondary endpoints, except for bleeding complications, significantly more frequent in diabetic patients [HR (95% CI) 2.02 (1.14-3.6), P = 0.02; adjusted HR (95% CI) = 2.1 (1.01-4.3), P = 0.05]. No significant interaction was observed between type of dual antiplatelet therapy, diabetic status and outcome. CONCLUSION: Among elderly patients with acute coronary syndromes, diabetic status was associated with higher rates of comorbidities, more severe cardiovascular risk profile and major bleeding complications fully accounting for the absolute increase in mortality. In fact, diabetes mellitus did not emerge as an independent predictor of survival in advanced age. Journal of cardiovascular medicine (Hagerstown, Md.) published new progress in MEDLINE about 110-42-9, 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Quality Control of 110-42-9.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics