Month: December 2022

Millar, Shannon published the artcileSome observations on detritylation in solid-phase oligonucleotide synthesis, COA of Formula: C19H14O2, the publication is Nucleic Acids Symposium Series (2008), 52(1), 311-312, database is CAplus and MEDLINE.

A symposium. The quality of oligodeoxyribonucleotides prepared by solid phase synthesis under different acid treatment time was compared. Much shorter acid delivery time did not lead to significant decrease of the full length products.

Nucleic Acids Symposium Series published new progress about 596-38-3. 596-38-3 belongs to alcohols-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Benzene,Alcohol, name is 9-Phenyl-9H-xanthen-9-ol, and the molecular formula is C19H14O2, COA of Formula: C19H14O2.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Ni, Ruijie published the artcileCharacterization of key odorants in fried red and green huajiao (Zanthoxylum bungeanum maxim. and Zanthoxylum schinifolium sieb. et Zucc.) oils, Recommanded Product: cis-3,7-Dimethyl-2,6-Octadien-1-Ol, the publication is Food Chemistry (2022), 131984, database is CAplus and MEDLINE.

Fried huajiao oil (FHO) samples prepared with red or green huajiao are widely applied in different Chinese cuisines due to their own aroma characteristics. To investigate their different aroma profiles, 2 red and 3 green FHOs were analyzed by quant. descriptive sensory anal. (QDA) and gas chromatog.-olfactometry/aroma intensity (GC-O/AI). QDA results showed a distinct difference among FHOs in terms of all sensory attributes. Thirty odorants with high OAVs and AIs were screened from 5 FHOs, among which β-myrcene, (E)-2-heptenal, limonene, α-terpineol and p-cymene were the major characteristic compounds of FHOs. In addition, through orthogonal partial least square discriminate anal. (OPLS-DA), linalool, linalyl acetate, and 1,8-cineole were considered as the volatile markers for classification of FHOs with red and green huajiao. Thereafter, aroma recombination and omission tests were performed to characterize the key aroma compounds of red and green FHOs.

Food Chemistry published new progress about 106-25-2. 106-25-2 belongs to alcohols-buliding-blocks, auxiliary class Natural product, name is cis-3,7-Dimethyl-2,6-Octadien-1-Ol, and the molecular formula is C10H18O, Recommanded Product: cis-3,7-Dimethyl-2,6-Octadien-1-Ol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Qi, Xiao-ru published the artcileAnalysis on phenolic compounds and aroma components in four kinds of fruit concentrated juice, Safety of Triethylsilanol, the publication is Shipin Keji (2018), 43(2), 279-285, database is CAplus.

In 4 different kinds of fruit concentrated juice as raw materials, using high performance liquid chromatog. (HPLC) and gas chromatog. mass spectrometry (GC-MS) determination of the content of the 12 monomer phenols and aromatic components, and then analyzes the characteristics of 4 kinds of phenolic substances in fruit concentrated juice and aroma components. HPLC anal. results showed that the total amount of monomeric phenols in the concentrated red jujube juice was the highest, up to 17.6847 mg/L. Followed by concentrated hawthorn juice, the content of 16.4618 mg/L. The concentrated grape juice was 5.5437 mg/L, the concentrated red jujube juice treated with decoloration and deacidification was 4.4181 mg/L. GC-MS anal. results showed that 102 kinds of aroma compounds were detected from 4 kinds of concentrated juice, including 29 kinds of concentrated grape juice, 23 kinds of decolorization and deacidifica concentrated jujube juice, 51 kinds of concentrated hawthorn juice and 53 kinds of common concentrated red date juice, the experiments provided a theor. basis for the evaluation of the quality of the concentrated juice.

Shipin Keji published new progress about 597-52-4. 597-52-4 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic Chain, name is Triethylsilanol, and the molecular formula is C6H16OSi, Safety of Triethylsilanol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Hasegawa, Tadashi published the artcileNovel biradical cyclization via remote-hydrogen transfer in photochemistry of 2-(dialkylamino)ethyl 3-benzoylacrylates, Computed Properties of 101-98-4, the publication is Bulletin of the Chemical Society of Japan (1993), 66(10), 3128-31, database is CAplus.

2-(Dibenzylamino)ethyl and 2-(benzylmethylamino)ethyl 3-benzoylacrylate underwent photocyclization via remote-proton transfer from their (Z)-forms competing with (E)-(Z) isomerization. The quantum yield for the cyclization when both (E)- and (Z)-isomers absorb the irradiating light was estimated to be 0.05 by applying the steady-state approximation

Bulletin of the Chemical Society of Japan published new progress about 101-98-4. 101-98-4 belongs to alcohols-buliding-blocks, auxiliary class Amine,Benzene,Alcohol, name is 2-(Benzyl(methyl)amino)ethanol, and the molecular formula is C10H15NO, Computed Properties of 101-98-4.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Wang, Yinli published the artcileEnhanced Molecular Recognition through Substrate-Additive Complex Formation in N-Heterocyclic-Carbene-Catalyzed Kinetic Resolution of α-Hydroxythioamides, COA of Formula: C8H8O3, the publication is ACS Catalysis (2022), 12(10), 6100-6107, database is CAplus.

A new way of understanding enhanced mol. recognition through substrate-additive complex formation and the development of the first catalytic kinetic resolution of α-hydroxythioamides RCH(OH)C(S)NH(R¹) (R = Me, cyclopropyl, Ph, etc.; R¹ = Et, t-Bu, 3,5-bis(trifluoromethyl)phenyl, etc.), which are versatile synthetic building blocks, using chiral N-heterocyclic carbene I-catalyzed enantioselective acylation assisted by a carboxylate additive viz., 9-Julolidinecarboxylic acid was described. Mass spectrometry provided evidence for the role of the additive, which forms a hydrogen-bonded complex with α-hydroxythioamide, resulting in both rate and selectivity enhancements. The synthetic applications of the resolved α-hydroxythioamides highlight the usefulness of the developed method.

ACS Catalysis published new progress about 90-64-2. 90-64-2 belongs to alcohols-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Alcohol,Natural product, name is 2-Hydroxy-2-phenylacetic acid, and the molecular formula is C7H9NO, COA of Formula: C8H8O3.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Wakioka, Masayuki published the artcileSynthesis of a 1,2-dithienylethene-containing donor-acceptor polymer via palladium-catalyzed direct arylation polymerization (DArP), Product Details of C20H28B2O4S2, the publication is Molecules (2018), 23(4), 981/1-981/10, database is CAplus and MEDLINE.

This paper reports the synthesis of D-A polymers containing 1,2-dithienylethene (DTE) units via palladium-catalyzed direct arylation polymerization (DArP). The reaction of dibromoisoindigo (1-Br) and DTE (2-H), in the presence of Pd₂(dba)₃·CHCl₃ (0.5 mol%), P(2-MeOC₆H₄)₃ (L1) (2 mol%), pivalic acid (1 equiv) as catalyst precursors, and Cs₂CO₃ (3 equiv) as a base affords poly(1-alt-2) with a high mol. weight (M_n up to 44,900). Although, it has been known that monomers, with plural C-H bonds, tend to form insoluble materials via direct arylation at undesirable C-H positions; the reaction of 1-Br and 2-H cleanly proceeds without insolubilization. The resulting polymer has a well-controlled structure and exhibits good charge transfer characteristics in an organic field-effect transistor (OFET), compared to the polymer produced by Migita-Kosugi-Stille cross-coupling polymerization The DArP product displays an ideal linear relationship in the current-voltage curve, whereas the Migita-Kosugi-Stille product shows a V_G-dependent change in the charge mobility.

Molecules published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C8H6ClF3, Product Details of C20H28B2O4S2.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Itoga, Moeko published the artcileIridium-catalyzed α-selective deuteration of alcohols, Computed Properties of 111-29-5, the publication is Chemical Science (2022), 13(30), 8744-8751, database is CAplus and MEDLINE.

The α-selective, iridium(III)-bipyridonate-catalyzed hydrogen(H)/deuterium(D) isotope exchange of alcs. using deuterium oxide (D₂O) as the primary deuterium source to afford deuterated alcs. RCD₂OH [R = Ph, 2-MeC₆H₄, 4-FC₆H₄, etc.], R¹DCOHR² [R¹ = Ph, 4-ClC₆H₄, 4-BrC₆H₄, etc.; R² = Me, cyclopropyl, Ph] was reported. This method enabled the direct, chemoselective deuteration of primary and secondary alcs. under basic or neutral conditions without being affected by coordinative functional groups such as imidazole and tetrazole. Successful substrates for deuterium labeling include the pharmaceuticals losartan potassium, rapidosept, guaifenesin and diprophylline. The deuterated losartan potassium showedhigher stability toward the metabolism by CYP2C9 than the protiated analog. Kinetic and DFT studies indicated that the direct deuteration proceeded through dehydrogenation of alc. to the carbonyl intermediate, conversion of [IrIII-H] to [IrIII-D] with D2O, and deuteration of the carbonyl intermediate to give the α-deuterated products.

Chemical Science published new progress about 111-29-5. 111-29-5 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ploymers, name is Pentane-1,5-diol, and the molecular formula is C5H12O2, Computed Properties of 111-29-5.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Kanakubo, Masashi published the artcileRoom-Temperature Phosphorescence of Thiophene Boronate Ester-Cross Linked Polyvinyl Alcohol; A Triplet-to-Singlet FRET-Induced Multi-Color Afterglow Luminescence with Sulforhodamine B, Computed Properties of 239075-02-6, the publication is Bulletin of the Chemical Society of Japan (2021), 94(4), 1204-1209, database is CAplus.

A thiophene-derived boronate ester-crosslinked polyvinyl alc., 1-PVA, has been prepared, which was found to exhibit room-temperature phosphorescence (RTP) at 475 nm upon UV irradiation (λem = 254 nm). The quantum yield (Fp) was determined to be 6.3% with a phosphorescence lifetime of 256 ms, the cyanish afterglow being visually detected after switching the UV lamp off. The emission properties were rationalized by El-Sayed’s rule, where introduction of a sulfur atom brings about n → π* transition in the T2 state to promote an ISC channel. Given that the phosphorescence spectrum at 77 K was consistent with that in the PVA film, the rigid environment of PVA-based matrix may stabilize the triplet state. In addition, the delayed emissive color was tuned by doping various amounts of sulforhodamine B (SRhoB) in the film; a triplet-to-singlet Forster-type resonance energy transfer process occurred from crosslinked thiophene boronate to SRhoB acceptor which modified the emission to a white-light afterglow. Given water-sensitivity of the resultant film, high-contrast water writing on the film was achieved, which would be profitable for a low-cost security film.

Bulletin of the Chemical Society of Japan published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Computed Properties of 239075-02-6.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Nakatsuji, Jun-ya published the artcileSynthesis and structure of boron compounds bearing tridentate ligands with 1,3-bicarbonylbenzene skeleton, SDS of cas: 25240-59-9, the publication is Bulletin of the Chemical Society of Japan (2010), 83(7), 767-776, database is CAplus.

In order to examine differences in structure due to the electronic nature of the oxygen ligand, several organoboron compounds bearing ester BXL¹ (L¹ = 2,6-bis(tert-butoxycarbonyl)phenyl, X = pinacolato, 8a; X = catecholato, 8b; X = fluorenyl, 8c) and amide BXL² (L² = 2,6-bis(N,N-diisopropylaminocarbonyl)phenyl, X = pinacolato, 13a and X = catecholato, 13b) ligands were prepared and crystallog. analyzed. In the ester ligand systems, the pinacolato derivative 8a and catecholato derivative 8b took a pentacoordinate structure, while fluorenyl derivative 8c took a tetracoordinate structure instead of pentacoordinate due to the strong electrophilic nature of the boron atom. In contrast to the ester ligand systems, no pentacoordinate species were found in the amide ligand systems. The pinacolato derivative 13a is tricoordinated, and catecholato derivative 13b is tetracoordinated. These results could be due to the steric effect of the diisopropylamide ligand together with the electronic effects. The VT NMR study and the DFT calculations reveal that the energy difference between the tetracoordinate and pentacoordinate structure in 8c is very small, and indicated that the electronic nature and steric effects of the ligand greatly affect the coordination state of the boron atom.

Bulletin of the Chemical Society of Japan published new progress about 25240-59-9. 25240-59-9 belongs to alcohols-buliding-blocks, auxiliary class Boronic acid and ester,Boronic Acids,Boronate Esters, name is 4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-ol, and the molecular formula is C6H13BO3, SDS of cas: 25240-59-9.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Kaneko, Naoki published the artcileIdentification and quantification of amyloid beta-related peptides in human plasma using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, Formula: C14H28O5S, the publication is Proceedings of the Japan Academy, Series B: Physical and Biological Sciences (2014), 90(3), 104-117, database is CAplus and MEDLINE.

Proteolytic processing of the amyloid precursor protein (APP) by β-secretase and γ-secretase leads to the generation and deposition of amyloid β (Aβ) in Alzheimer’s disease (AD). N-terminally or C-terminally truncated Aβ variants have been found in human cerebrospinal fluid and cultured cell media using immunoprecipitation and mass spectrometry. Unfortunately, the profile of plasma Aβ variants has not been revealed due to the difficulty of isolating Aβ from plasma. We present here for the first time studies of Aβ and related peptides in human plasma. Twenty-two Aβ-related peptides including novel peptides truncated before the β-secretase site were detected in human plasma and 20 of the peptides were identified by tandem mass spectrometry. Using an internal standard, we developed a quant. assay for the Aβ-related peptides and demonstrated plasma dilution linearity and the precision required for their quantitation. The present method should enhance the understanding of APP processing and clearance in AD progression.

Proceedings of the Japan Academy, Series B: Physical and Biological Sciences published new progress about 85618-21-9. 85618-21-9 belongs to alcohols-buliding-blocks, auxiliary class Tetrahydropyran,Chiral,sulfides,Alcohol, name is (2R,3S,4S,5R,6S)-2-(Hydroxymethyl)-6-(octylthio)tetrahydro-2H-pyran-3,4,5-triol, and the molecular formula is C14H28O5S, Formula: C14H28O5S.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts