Month: October 2022

Margarita, Cristiana; Villo, Piret; Tunon, Hernando; Dalla-Santa, Oscar; Camaj, David; Carlsson, Robin; Lill, Malin; Ramstroem, Anja; Lundberg, Helena published the artcile< Zirconium-catalysed direct substitution of alcohols: enhancing the selectivity by kinetic analysis>, Category: alcohols-buliding-blocks, the main research area is ether preparation; alc substitution zirconium catalyst; thioether preparation; thiol alc substitution zirconium catalyst.

Kinetic anal. was used as a tool for rational optimization of a catalytic, direct substitution of alcs. to enable the selective formation of unsym. ethers, thioethers, and Friedel-Crafts alkylation products using a moisture-tolerant and com. available zirconium complex (2 to 8 mol%). Operating in air and in the absence of dehydration techniques, the protocol furnished a variety of products in high yields, including glycosylated alcs. and sterically hindered ethers. In addition, the kinetic studies provided mechanistic insight into the network of parallel transformations that take place in the reaction, and helped to elucidate the nature of the operating catalyst.

Catalysis Science & Technology published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 76-84-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C19H16O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Malekzadeh, Parisa; Cowan, Kenneth; Steinberg, Seth M.; Camphausen, Kevin A.; Shriver, Craig; Merino, Maria J.; Good, Meghan L.; Berman, Arlene; Danforth, David N. Jr published the artcile< Twenty-five-Year Follow-up of a Prospective Randomized Trial Comparing Preoperative Versus Postoperative FLAC/Granulocyte Colony-Stimulating Factor Chemotherapy for Stage II Breast Cancer>, Related Products of 1492-18-8, the main research area is breast cancer stimulating factor chemotherapy.

Patients and methods: We conducted a single-institution prospective randomized control trial comparing preoperative or postoperative fluorouracil, leucovorin calcium, doxorubicin, and cyclophosphamides/granulocyte colony-stimulating factor chemotherapy for women with untreated clin. stage II breast cancer. Long-term follow-up was conducted to define toxicities, recurrence patterns and RFS and OS. Results: Fifty-three women with clin. stage II breast cancer were randomized, 26 patients to receive preoperative chemotherapy and 27 to receive postoperative chemotherapy. Long-term follow-up, with a median of 25.3 years, was obtained. Local or systemic recurrence occurred in 8 women in the preoperative group and in 10 women in the postoperative group, and recurrences were predominantly within 10 years of treatment. Late toxicities included local upper extremity paresthesia’s, upper extremity edema and congestive heart failure in 1 patient each. Anal. revealed no difference in RFS (20-yr RFS probabilities; preoperative: 61.3%, postoperative: 54.7%, P=0.42), or in OS between the 2 treatment groups (20-yr probabilities, preoperative: 64.6%, postoperative: 62.2%, P=0.44). Twenty-five of 53 patients (47%) were alive and without disease at this follow-up.

American Journal of Clinical Oncology published new progress about Chemotherapy. 1492-18-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C20H21CaN7O7, Related Products of 1492-18-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wandee, Yuree; Uttapap, Dudsadee; Mischnick, Petra published the artcile< Yield and structural composition of pomelo peel pectins extracted under acidic and alkaline conditions>, Electric Literature of 3458-28-4, the main research area is pomelo peel pectin yield structural composition acidic alk.

Extraction of pectin from pomelo peel was performed using water, acid and alk. solutions with a microwave power of 1100 W for 2 min, and yield and structural/chem. characteristics of the extracted pectins were investigated. Extraction of pectin with water gave the lowest yield (6.5%, dry weight basis). The water-extracted pectin contained the highest amount of neutral sugar (29.5%), while equivalent mol. weight (MWeq) and degree of methylation (DM) were 43 kDa and 29.7%, resp. Extraction of pectin with HCl solutions at concentrations of 25, 50, 100 and 200 mM resulted in a significant increase of pectin yields (12.1-20.5%) and pectins with high amount of galacturonic acid (83.3-85.6%). The MWeq and DM of the acid-extracted pectins ranged from 171 to 368 kDa and 53.9-82.5%, resp. Compared to the acid, extraction with NaOH solutions at the same concentrations provided higher yields (13.9-24.2%), smaller size (142-187 kDa) and lower DM (<1.7%) pectins, while amount of galacturonic acid was comparable. The highest yield of extraction was found at a concentration of 50 mM for both HCl and NaOH solutions Extraction of pomelo peel with 50 mM NaOH solution by reduction of the microwave power to 550 W and extending the extraction time to 15 min resulted in an increase of pectin yield (29.2%) and pectin with smaller size (76 kDa). Food Hydrocolloids published new progress about Acid hydrolysis. 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Electric Literature of 3458-28-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Makino, Kosho; Tozawa, Kumi; Tanaka, Yuki; Inagaki, Akiko; Tabata, Hidetsugu; Oshitari, Tetsuta; Natsugari, Hideaki; Takahashi, Hideyo published the artcile< Rapid Photoracemization of Chiral Alkyl Aryl Sulfoxides>, Synthetic Route of 699-12-7, the main research area is alkyl aryl sulfoxide photoracemization oxidation potential.

The photoracemization of chiral alkyl aryl sulfoxides with a photosensitizer has not been sufficiently investigated thus far. Therefore, in this study, a rapid photoracemization reaction of enantiopure alkyl aryl sulfoxides using 1 mol % 2,4,6-triphenylpyrylium tetrafluoroborate (TPT+) was developed. Various substitution patterns were tolerated and every racemization reaction proceeded extremely fast (k2 = 1.77 x 104-6.08 x 101 M-1s-1, t1/2 = 0.4-114 s). Some chiral sulfoxides with easily oxidizable functional groups are not appropriate for this photoisomerization. The electrochem. potentials of the functional groups, determined via cyclic voltammetry, are useful for predicting the reactive or nonreactive groups in this photoracemization reaction. A calculation study was conducted to clarify the sp2-like nature of S of the sulfoxide cation radical, which makes photoracemization easier.

Journal of Organic Chemistry published new progress about Aromatic compounds, sulfoxides Role: PRP (Properties), PUR (Purification or Recovery), RCT (Reactant), SPN (Synthetic Preparation), PREP (Preparation), RACT (Reactant or Reagent). 699-12-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H10OS, Synthetic Route of 699-12-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Dong, Wei; Fang, Zhuo-Yue; Cao, Tong-Yang; Cao, Jie-Hui; Zhao, Zi-Qiang; Zhang, Linlin; Li, Wei; Qi, Lin; Wang, Li-Jing published the artcile< Copper-Catalyzed Aminosulfonylation of O-Homoallyl Benzimidates with Sodium Sulfinates to Access Sulfonylated 1,3-Oxazines>, HPLC of Formula: 627-27-0, the main research area is sulfonyl oxazine preparation; homoallyl benzimidate sodium sulfinate aminosulfonylation copper catalyst.

A facile copper-catalyzed aminosulfonylation of O-homoallyl benzimidates with sodium sulfinates in the presence of tert-Bu peroxybenzoate (TBPB) and XPhos ligand has been developed. By using this protocol, a variety of potentially bioactive 1,3-oxazines were directly synthesized. This method has the merits of a cheap catalyst, easily available and stable sulfone reagents, and simple operation.

Organic Letters published new progress about Benzimidazoles Role: RCT (Reactant), RACT (Reactant or Reagent). 627-27-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C4H8O, HPLC of Formula: 627-27-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Russo, E.; Montt Guevara, M.; Giannini, A.; Mannella, P.; Palla, G.; Caretto, M.; Pancetti, F.; Genazzani, A. D.; Simoncini, T. published the artcile< Cranberry, D-mannose and anti-inflammatory agents prevent lower urinary tract symptoms in women undergoing prolapse surgery>, Recommanded Product: (2S,3S,4R,5R)-2,3,4,5,6-Pentahydroxyhexanal, the main research area is mannose anti inflammatory agent human urinary tract prolapse surgery; Cystocele; lower urinary tract symptoms; nutritional supplements; pelvic organ prolapse.

We assessed the effect on lower urinary tract symptoms (LUTS) of a supplement containing cranberry, D-mannose and anti-inflammatory mols. in postmenopausal women undergoing surgery for cystocele. Forty postmenopausal women were randomized 1:1 to an active group receiving the nutritional supplement twice a day for 2 wk starting from surgery, or to a control group receiving surgery only. Primary outcomes were the effectiveness in the postoperative LUTS and urinary tract infections (UTI). LUTS were investigated by a validated questionnaire (ICIQ-FLUTS) at baseline and at week 4. Secondary outcomes were the safety and tolerability of the supplement and other perioperative outcomes. No significant differences were found in perioperative outcomes and in incidence of UTI. After surgery, women treated with the supplement experienced significantly better scores on the filling domain of the questionnaire. A non-significant decrease in voiding scores was also found. No adverse events were detected. The use of an oral supplement containing cranberry, D-mannose and anti-inflammatory mols. decreases the perception of LUTS in postmenopausal women after anterior colporraphy. Our data suggest that perioperative use of nutritional supplements may be useful in the management of postoperative LUTS.

Climacteric published new progress about Anti-inflammatory agents. 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Recommanded Product: (2S,3S,4R,5R)-2,3,4,5,6-Pentahydroxyhexanal.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Verma, Ashutosh; Hazra, Susanta; Dolui, Pritam; Elias, Anil J. published the artcile< Ruthenium-Catalyzed Synthesis of α-Alkylated Ketones and Quinolines in an Aqueous Medium via a Hydrogen-Borrowing Strategy Using Ketones and Alcohols>, Category: alcohols-buliding-blocks, the main research area is ruthenium catalyst preparation; aryl ketone alc ruthenium catalyst green alkylation; phenyl arylpropanone preparation; arylquinoline preparation.

A simple, efficient, and sustainable method for the synthesis of α-alkylated ketones and quin50556012Aolines using a hydrogen-borrowing strategy was reported, which has emerged as a greener alternative in organic transformation reactions. Synthesis of a range of α-alkylated ketones and quinoline derivatives was achieved by using the water-soluble [Ru(8-AQ)Cl(p-cym.)]+Cl- [Ru]-1 (AQ=aminoquinoline) catalyst with water as the reaction medium. By adopting this strategy, α-alkylated ketones and quinolines was synthesized using ketones or secondary alcs. as starting materials and the primary alc. as a green and naturally abundant alkylating agent.

Asian Journal of Organic Chemistry published new progress about Alkylation. 5344-90-1 belongs to class alcohols-buliding-blocks, and the molecular formula is C7H9NO, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yu, Jiajia; Zhang, Huihui; Wu, Xinxin; Zhu, Chen published the artcile< Intermolecular radical fluoroalkylative olefination of unactivated alkenes>, Electric Literature of 627-27-0, the main research area is vinyl preparation photochem regioselective chemoselective diastereoselective; alkene intermol radical fluoroalkylative olefination.

A novel, efficient radical-mediated intermol. fluoroalkylative olefination of inactivated alkenes RCH=CH2 [R = 2-hydroxypropan-2-yl, 1-(2-oxocyclohexyl)methyl, 3-(1-benzothiophen-2-yl)-3-oxopropyl, etc.] was disclosed. The transformation proceeded through a radical docking-migration cascade, in which a portfolio of strategically designed dual-function alkenylating reagents was harnessed to afford vinylated products RC(CH=CHR1)(C(Br)(F)(R2)) [R1 = Ph, 4-MePh, naphthalen-2-yl, etc.; R2 = CN, COOEt] with exclusive E-configuration. The reaction featured mild conditions, broad functional group compatibility, and unique chemo-, regio-, and stereoselectivities. The protocol has also provided a useful approach for late-stage olefination of complex natural products and drug derivatives containing alkenyl moieties.

CCS Chemistry published new progress about Alkenes Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 627-27-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C4H8O, Electric Literature of 627-27-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ibrahim, Elsayed A.; Wang, Mei; Radwan, Mohamed M.; Wanas, Amira S.; Majumdar, Chandrani G.; Avula, Baharthi; Wang, Yan-Hong; Khan, Ikhlas A.; Chandra, Suman; Lata, Hemant; Hadad, Ghada M.; Abdel Salam, Randa A.; Ibrahim, Amany K.; Ahmed, Safwat A.; El Sohly, Mahmoud A. published the artcile< Analysis of Terpenes in Cannabis sativa L. Using GC/MS: Method Development, Validation, and Application>, Reference of 78-70-6, the main research area is terpene Cannabis sativa gas chromatog mass spectrometry.

Terpenes are the major components of the essential oils present in various Cannabis sativaL. varieties. These compounds are responsible for the distinctive aromas and flavors. Besides the quantification of the cannabinoids, determination of the terpenes in C. sativastrains could be of importance for the plant selection process. At the University of Mississippi, a GC-MS method has been developed and validated for the quantification of terpenes in cannabis plant material, viz., α-pinene, β-pinene, β-myrcene, limonene, terpinolene, linalool, α-terpineol, β-caryophyllene, α-humulene, and caryophyllene oxide. The method was optimized and fully validated according to AOAC (Association of Official Anal. Chemists) guidelines against reference standards of selected terpenes. Samples were prepared by extraction of the plant material with Et acetate containing n-tridecane solution (100μg/mL) as the internal standard The concentration-response relationship for all analyzed terpenes using the developed method was linear with r 2values > 0.99. The average recoveries for all terpenes in spiked indoor cultivated samples were between 95.0 – 105.7%, with the exception of terpinolene (67 – 70%). The measured repeatability and intermediate precisions (% relative standard deviation) in all varieties ranged from 0.32 to 8.47%. The limit of detection and limit of quantitation for all targeted terpenes were determined to be 0.25 and 0.75μg/mL, resp. The proposed method is highly selective, reliable, and accurate and has been applied to the simultaneous determination of these major terpenes in the C. sativabiomass produced by our facility at the University of Mississippi as well as in confiscated marijuana samples.

Planta Medica published new progress about Cannabinoids Role: ANT (Analyte), ANST (Analytical Study). 78-70-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C10H18O, Reference of 78-70-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Fuss, Werner published the artcile< Previtamin D: Z-E photoisomerization via a Hula-twist conical intersection>, Category: alcohols-buliding-blocks, the main research area is previtamin photoisomerization conical intersection rotamer CD.

On photoisomerization of previtamin D – a steroid Z-triene – produced in situ by ring opening of 7-dehydrocholesterol in a cold matrix, it was found in A.M.Muller et al. [Angew.Chem., Int.Ed., 1998, 37, 505-507] that the product (tachysterol) had rotated not only its central double bond but also an adjacent single bond. This is called a Hula twist (HT) due to the alternative description, in which it is just one central CH group that rotates. It was pointed out that the results directly support the calculated mol. structure at a conical intersection, which mediates the Z-E isomerization of polyenes. With a more sophisticated technique, Saltiel et al. (J.Phys.Chem.Lett., 2013, 4, 716-721) confirmed this tachysterol rotamer as the main product but found two addnl. conformers. They believed to have seen also three previtamin D conformers, suggested to be a result of hot-ground-state reactions from the primary rotamer, and interpreted all tachysterol products to be a result of a double-bond twist (DBT), not a HT. On the basis of published CD data and consideration of other reactions, it is here shown that under these conditions hot-ground-state reactions are unimportant or even negligible and that there is practically only a single conformer of previtamin D after ring opening. All products can be easily understood on the basis of an HT-type conical intersection, which is thus further supported. Invoking a published pretwist model even rationalizes product ratios. The two twists in HT are concerted. Furthermore HT is fully consistent with the NEER principle (nonequilibration of excited rotamers) and even offers addnl. possibilities for conformer control.

Physical Chemistry Chemical Physics published new progress about Bond angle, torsional. 434-16-2 belongs to class alcohols-buliding-blocks, and the molecular formula is C27H44O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts