Tag: M.W=100-150

Galloway, John M. published the artcileSynthesis and characterization of bifunctional surfaces with tunable functional group pairs, Name: Triethylsilanol, the publication is Surface Science (2016), 284-290, database is CAplus.

Grafting of pairs of functional groups onto a silica surface was demonstrated by tethering both terminals of an organochlorosilane precursor mol., Cl₂(CH₃)Si(CH₂)₄(CO)(OSi(i-Pr)₂)(CH₂)₂Si(CH₃)Cl₂, that possess a cleavable silyl ester bond, onto a silica surface. Hydrolytic cleavage of the silyl ester bond of the grafted mol. resulted in the generation of organized pairs of carboxylic acid and organosilanol groups. This organosilanol moiety was easily transformed into other functional groups through condensation reactions to form, together with the neighboring acid group, pairs such as carboxylic acid/secondary amine, carboxylic acid/pyridine, and carboxylic acid/phosphine. In the case of carboxylic acid/amine pairing, there was evidence of the formation of amide. A sample grafted with amine-carboxylic acid pairs was three times more active (per free amine) than a sample without such pairs for the nitroaldol condensation of 4-nitrobenzaldehyde and nitromethane.

Surface Science 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, Name: Triethylsilanol.

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

Ziegler, Felix published the artcileConfinement Effects for Efficient Macrocyclization Reactions with Supported Cationic Molybdenum Imido Alkylidene N-Heterocyclic Carbene Complexes, Synthetic Route of 111-29-5, the publication is ACS Catalysis (2021), 11(18), 11570-11578, database is CAplus.

For entropic reasons, the synthesis of macrocycles via olefin ring-closing metathesis (RCM) is impeded by competing acyclic diene metathesis (ADMET) oligomerization. With cationic molybdenum imido alkylidene N-heterocyclic carbene (NHC) complexes confined in tailored ordered mesoporous silica, RCM can be run with macrocyclization selectivities up to 98% and high substrate concentrations up to 0.1 M. Mol. dynamics simulations show that the high conversions are a direct result of the proximity between the surface-bound catalyst, proven by extended X-ray absorption spectroscopy, and the surface-located substrates. Back-diffusion of the macrocycles decreases with decreasing pore diameter of the silica and is responsible for the high macrocyclization efficiency. Also, Z-selectivity increases with decreasing pore diameter and increasing Tolman electronic parameter of the NHC. Running reactions at different concentrations allows for identifying the optimum substrate concentration for each material and substrate combination.

ACS Catalysis 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 C8H17Br, Synthetic Route of 111-29-5.

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

Hurd, Charles D. published the artcileThienol, Quality Control of 17236-59-8, the publication is Journal of the American Chemical Society (1950), 5543-6, database is CAplus.

Thiophene-2-ol (I) was obtained by oxidizing 2-thienylmagnesium bromide (16.3 g. 2-bromothiophene, 18.5 g. iso-PrBr, and 6.5 g. Mg in 200 cc. ether) with dry O at 0°, hydrolyzing the product with dilute H₂SO₄, saturating with NaCl, and extracting the aqueous solution and the ether solution with 20% NaOH; 25% I, light yellow liquid, b₆ 80-84°, and 29% 2,2′-bithiophene, were obtained. I was vacuum-distilled in N; the colorless center fraction on cooling formed long needles, m. 7-9°, b₇₆₀ 217-19° (in N), d²⁰₄ 1.255, n²⁰_D 1.5644, mol. refraction 25.93, soluble in hexane 42%, in H₂O 6%, miscible in all other common solvents. Also prepared were the acetate, solidified at -10° to -20°; benzoate, fine colorless crystals, m. 44-5°; Me 2-thienyl ether, 5-phenylazothienolophene-2-ol, m. 120-25°, and 2(or 4)-benzylidene-3(or 2)-butenothiolactone, m. 97.5-8.5°. The infrared and ultraviolet spectra gave evidence that I exists as keto-enol tautomers. It gives a red color with FeCl₃, is a weak acid, undergoes characteristic reactions of the phenolic OH group, and reacts readily with diazotized amines in alk. solution The presence of the thiolactone was indicated by ring fission occurring in warm acid or alkali or during methylation with MeI or Me₂SO₄, and by the ready condensation with BzH. Under conditions sufficient for quant. monobromination of phenol, I consumed 1/3 equivalent of Br. Oxidation of 3-thienylmagnesium bromide gave a low yield of a steam-volatile liquid, very weakly acidic, having a phenolic odor and giving an intense vermilion with FeCl₃; it apparently coupled with diazotized aniline. It is suggested that this compound was thiophene-3-ol.

Journal of the American Chemical Society published new progress about 17236-59-8. 17236-59-8 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Alcohol, name is Thiophen-3-ol, and the molecular formula is C4H4OS, Quality Control of 17236-59-8.

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

Ishikawa, Nobuo published the artcilePreparation of trifluoromethylated allylic alcohols from trifluoroacetaldehyde and organometallic compounds, Application In Synthesis of 83706-94-9, the publication is Journal of Fluorine Chemistry (1984), 24(4), 419-30, database is CAplus.

A number of allylic alcs. bearing a CF₃ group at the α- or γ-position, and α-trifluoromethylated γ-enols and -ynols were prepared by the reaction of CF₃CHO with a variety of organometallic compounds Most of the Reformatskii- or Grignard-type reactions required promotion by ultrasound. E.g., Reformatskii-type reaction of CF₃CHO and BrCH₂CO₂Et in the presence of Zn powder and ultrasound gave CF₃CH(OH)CH₂CO₂Et, which was dehydrated, then reduced (LiAlH₄/AlCl₃) to give CF₃CH:CHCH₂OH. Also prepared were RCH:CHCH(OH)CF₃ (R = Bu, Ph), RCMe:CHCH(OH)CF₃ (same R), CF₃CH(OH)CHR¹CH:CH₂ (R¹ = H, Me, Ph), and CF₃CH(OH)CH₂CCH.

Journal of Fluorine Chemistry published new progress about 83706-94-9. 83706-94-9 belongs to alcohols-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is (E)-4,4,4-Trifluorobut-2-en-1-ol, and the molecular formula is C4H5F3O, Application In Synthesis of 83706-94-9.

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

Seitz, Ann-Katrin published the artcileConcentrated Aqueous Peroxodicarbonate: Efficient Electrosynthesis and Use as Oxidizer in Epoxidations, S-, and N-Oxidations, Name: 2-Morpholinoethanol, the publication is Angewandte Chemie, International Edition (2022), 61(25), e202117563, database is CAplus and MEDLINE.

Peroxodicarbonates are of substantial interest as potentially powerful and sustainable oxidizers but have so far been accessible only in low concentrations with unsatisfactory energy efficiency. Concentrated (> 0.9 mol L^-1) peroxodicarbonate solutions have now been made accessible by the electrolysis of aqueous K₂CO₃/Na₂CO₃/KHCO₃ solutions at high c.d. of 3.33 A cm^-2 in an efficiently cooled circular flow reactor equipped with a boron-doped diamond anode and a stainless-steel cathode. Their synthetic potential as platform oxidizers was clearly demonstrated in transformations including sulfoxidation, N-oxidation, and epoxidation

Angewandte Chemie, International Edition published new progress about 622-40-2. 622-40-2 belongs to alcohols-buliding-blocks, auxiliary class Morpholine,Alcohol, name is 2-Morpholinoethanol, and the molecular formula is C12H23N3S, Name: 2-Morpholinoethanol.

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

Limnios, Dimitris published the artcileOrganocatalytic Oxidation of Organosilanes to Silanols, Related Products of alcohols-buliding-blocks, the publication is ACS Catalysis (2013), 3(10), 2239-2243, database is CAplus.

The oxidation of organosilanes to silanols constitutes an attractive transformation for both industry and academia. Bypassing the need for stoichiometric oxidants or precious metal catalytic complexes, the first organocatalytic oxidation of silanes has been accomplished. Catalytic amounts of 2,2,2-trifluoroacetophenone, in combination with the green oxidant H₂O₂, lead to excellent to quant. yields in a short reaction time. A variety of alkyl, aryl, alkenyl, and alkynyl substituents can be tolerated, providing an easy, cheap, efficient, and practical solution to a highly desirable transformation.

ACS Catalysis 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, Related Products of alcohols-buliding-blocks.

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

Spiliopoulou, Nikoleta published the artcilePhotochemical metal-free aerobic oxidation of thiols to disulfides, SDS of cas: 4410-99-5, the publication is Green Chemistry (2021), 23(1), 546-551, database is CAplus.

A mild, inexpensive and green photochem. approach for the synthesis of both sym. and non-sym. disulfides, using metal-free and environmentally friendly conditions was reported. Utilizing phenylglyoxylic acid as the photoinitiator, common household bulbs as the light source and a simple inorganic salt as the additive, a versatile oxidation of thiols leading to products in excellent yields was described.

Green Chemistry published new progress about 4410-99-5. 4410-99-5 belongs to alcohols-buliding-blocks, auxiliary class Thiol,Benzene, name is 2-Phenylethanethiol, and the molecular formula is C11H14O4, SDS of cas: 4410-99-5.

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

Upare, Pravin P. published the artcileA Bimetallic Ru₃Sn₇ Nanoalloy on ZnO Catalyst for Selective Conversion of Biomass-Derived Furfural into 1,2-Pentanediol, Related Products of alcohols-buliding-blocks, the publication is ACS Sustainable Chemistry & Engineering (2021), 9(51), 17242-17253, database is CAplus.

Chemoselective hydrogenolysis of biomass-derived feedstocks into chems. is one of the most challenging transformations for upgrading biomass over noble-metal-based heterogeneous catalysts. Here, we demonstrate the use of an efficient Ru₃Sn₇ alloy-supported ZnO catalyst (Ru-Sn/ZnO) to convert biomass-derived furfural (FF) by selective formation of 1,2-pentanediol (1,2-PDO). We found that 1,2-PDO can be produced with a very high yield (>84%) while limiting the competitive formation of 1,5-PDO (yield of âˆ?2%) and other side hydrogenation reactions during FF hydrogenolysis. The new catalyst showed excellent catalytic performance and catalyst reusability when tested for up to five consecutive cycles without any significant deactivation. The remarkable performance of Ru-Sn/ZnO for selective formation of 1,2-PDO from FF was attributed to the combined effect of Ru₃Sn₇ alloy phases together with tin oxide species on a basic ZnO support. All the tested catalysts were thoroughly characterized through different characterization techniques to confirm the synergy of the active sites in the Ru-Sn/ZnO combination and its effectiveness for selective formation of 1,2-PDO. In addition, a possible reaction mechanism is proposed based on d. functional theory calculations and their correlation with exptl. results.

ACS Sustainable Chemistry & Engineering 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 C4H6N2, Related Products of alcohols-buliding-blocks.

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

Haraguchi, Kazutoshi published the artcileNew Aqueous Solutions with Lower Viscosities than Water, Recommanded Product: 3,3,3-Trifluoropropan-1-ol, the publication is Bulletin of the Chemical Society of Japan (2021), 94(4), 1185-1191, database is CAplus.

Liquid water exhibits many anomalous phys. properties because of its unique structure and hydrogen bonding networks, which were mostly uncovered at the beginning of the 20th century. Because of its interesting properties and microstructures under various conditions and in aqueous solutions, understanding the behavior of water is important, but remains scientifically challenging. Regarding the viscosity of aqueous solutions, despite the discovery 147 years ago that very small amounts of certain salts decrease the viscosity of water slightly, there has been no significant progress to date. Herein, we report new aqueous solutions, with low additive fractions and much lower viscosities than pure water, which exhibit unique viscosity-composition curves. The findings should spark renewed interest in scientific research on water, which may greatly impact numerous industries.

Bulletin of the Chemical Society of Japan published new progress about 2240-88-2. 2240-88-2 belongs to alcohols-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Aliphatic hydrocarbon chain,Alcohol, name is 3,3,3-Trifluoropropan-1-ol, and the molecular formula is C3H5F3O, Recommanded Product: 3,3,3-Trifluoropropan-1-ol.

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

Saito, Akinori published the artcileHydrosilane-assisted formation of metal nanoparticles on graphene oxide, Category: alcohols-buliding-blocks, the publication is Bulletin of the Chemical Society of Japan (2016), 89(1), 67-73, database is CAplus.

Metal nanoparticles were formed on graphene oxide by a deposition process with hydrosilane, giving thin layer metal-graphene oxide (metal/GO) composites. The particle size and catalytic activity could be controlled by varying the hydrosilane amount Hydrosilane prevented the aggregation of GO layers by surface functionalization via silane coupling reaction. The metal/GO composites were evaluated as catalysts in hydrosilane oxidation

Bulletin of the Chemical Society of Japan 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, Category: alcohols-buliding-blocks.

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