Day: November 28, 2022

Liu, Yu-ping published the artcileSynthesis of vanillin propylene glycol acetal catalyzed by NaHSO₄, Synthetic Route of 68527-74-2, the publication is Jingxi Huagong (2004), 21(11), 831-832, 846, database is CAplus.

Synthesis of vanillin propylene glycol acetal (I) was studied. Factors influencing the yield, such as different dehydrating agents, catalyst amounts, mole ratio of materials, were discussed and the better reaction conditions were determined Thus, 0.48 mol propylene glycol reacted with 0.2 mol vanillin in the presence of 1 g NaHSO₄ as catalyst and 100 mL benzene to give I in 85.2% yield. The structure of I was identified by means of GC, refractive index, IR and GC-MS.

Jingxi Huagong published new progress about 68527-74-2. 68527-74-2 belongs to dioxole, auxiliary class Dioxolane,Benzene,Phenol,Ether, name is 2-Methoxy-4-(4-methyl-1,3-dioxolan-2-yl)phenol, and the molecular formula is C11H14O4, Synthetic Route of 68527-74-2.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Petrov, D. A. published the artcileInteraction of Unsymmetrical 1,3-Dioxolanes with Methyl Diazoacetate, Application In Synthesis of 1193-11-9, the publication is Doklady Chemistry (Translation of the chemistry section of Doklady Akademii Nauk) (2002), 385(4-6), 207-208, database is CAplus.

The catalytic reaction of 2,2,4-trimethyl-1,3-dioxolane and 2-phenyl-4-methyl-1,3-dioxolane with Me diazoacetate to form substituted 1,4-dioxane compounds was studied via ¹H- and ¹³C-NMR techniques.

Doklady Chemistry (Translation of the chemistry section of Doklady Akademii Nauk) published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Application In Synthesis of 1193-11-9.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Petrov, D. A. published the artcileCatalytic reaction between polysubstituted 1,3-dioxolanes and diazoacetic ester, Recommanded Product: 2,2,4-Trimethyl-1,3-dioxolane, the publication is Izvestiya Vysshikh Uchebnykh Zavedenii, Khimiya i Khimicheskaya Tekhnologiya (2003), 46(6), 40-42, database is CAplus.

Polysubstituted 1,3-dioxolanes reacted stereoselectively with Et diazoacetate in the presence of BF₃·OEt₂, cupric triflate, or Rh₂(OAc)₄ as catalyst to give Et 1,4-dioxane-2-acetates.

Izvestiya Vysshikh Uchebnykh Zavedenii, Khimiya i Khimicheskaya Tekhnologiya published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Recommanded Product: 2,2,4-Trimethyl-1,3-dioxolane.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Maj, Anna M. published the artcileHighly enantioselective hydrogenation of new 2-functionalized quinoline derivatives, Category: dioxole, the publication is Tetrahedron Letters (2012), 53(35), 4747-4750, database is CAplus.

The asym. hydrogenation of a new series of 2-functionalized quinolines has been developed in the presence of in situ generated catalysts obtained from [Ir(cod)Cl]₂/(R)-bisphosphine/I₂ combinations. The enantioselectivity levels were as high as 84-94% ee for the synthesis of 1,2,3,4-tetrahydroquinolines.

Tetrahedron Letters published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C38H24F4O4P2, Category: dioxole.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Maj, Anna M. published the artcileSynthesis of new chiral 2-functionalized-1,2,3,4-tetrahydroquinoline derivatives via asymmetric hydrogenation of substituted quinolines, Related Products of dioxole, the publication is Tetrahedron (2013), 69(44), 9322-9328, database is CAplus.

The asym. hydrogenation of a series of quinolines substituted by a variety of functionalized groups linked to the C2 carbon atom is providing access to optically enriched 2-functionalized 1,2,3,4-tetrahydroquinolines in the presence of in situ generated catalysts from [Ir(cod)Cl]₂, a bisphosphine, and iodine. The enantioselectivity levels were as high as 96% ee.

Tetrahedron published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C38H24F4O4P2, Related Products of dioxole.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Aida, Yukimasa published the artcileRhodium-Catalyzed Asymmetric [2 + 2 + 2] Cycloaddition of α,ω-Diynes with Unsymmetrical 1,2-Disubstituted Alkenes, Category: dioxole, the publication is Organic Letters (2016), 18(11), 2672-2675, database is CAplus and MEDLINE.

It has been established that a cationic rhodium(I)/axially chiral biaryl bisphosphine complex catalyzes the asym. [2 + 2 + 2] cycloaddition of α,ω-diynes with electron-rich and unstrained unsym. 1,2-disubstituted alkenes to give chiral multicyclic compounds with good yields and ee values. Interestingly, enantioselectivity highly depends on the structures of α,ω-diynes used presumably due to the presence of two distinct reaction pathways.

Organic Letters published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C38H24F4O4P2, Category: dioxole.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Meslard, J. C. published the artcileSynthesis of cyclic acetals under mild conditions. Applications to the acetalization of chloramphenicol, Quality Control of 1193-11-9, the publication is Bulletin de la Societe Chimique de France (1985), 84-9, database is CAplus.

Acetalization of 1-2 and 1-3 diols, even as sterically crowded as chloramphenicol, by carbonyl derivatives with substituents of various sizes has been performed at room temperature under mild conditions, by using heterogeneous catalysis (sulfonated polystyrene) in the presence of mol. sieves. Several new acetals of chloramphenicol e.g. I, have thus been obtained in good yields, isolated and characterized.

Bulletin de la Societe Chimique de France published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Quality Control of 1193-11-9.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Mao, Deshou published the artcileAnalysis of volatile constituents from cocoa extract (Theobroma cacao. L) by using stir bar sorptive extraction-thermal desorption/gas chromatography-mass spectrometry, Product Details of C11H14O4, the publication is Xiangliao Xiangjing Huazhuangpin (2012), 5-9, 13, database is CAplus.

The volatile constituents of Cocoa extract were identified by using stir bar sorptive extraction-thermal desorption/gas chromatog.-mass spectrometry (SBSE-TDU/GC-MS). With the MS library search and retention index comparison, 73 compounds were confirmed with PDMS twister, and the main constituents included isovaleric acid (25.28%), isovaleraldehyde propylene glycol acetal (14.57%), benzyl acetate (10.60%), 1,2-propylene glycol (9.17%), phenethyl alc. (9.00%), dibenzyl ketone (5.00%), phenethyl phenylacetate (4.50%), isoamyl isovalerate (3.63%), 2,3,5-trimethylpyrazine (2.34%), 2-methoxy-3-Me pyrazine (2.29%), 2-isopropyl-5-methyl-2-hexenal (1.53%), Et linoleate (1.25%) and acetic acid (1.10%), while with EG-silicone twister, 59 chems. were determined, which included the following main compounds: 2,3,5-trimethylpyrazin (63.59%), acetic acid (12.06%), isovaleraldehyde propylene glycol acetal (4.96%), benzyl acetate (3.92%), palmitic acid (1.89%), guaiacol (1.41%), isovaleric acid (1.08%), dibenzyl ketone (1.08%) and glycerin (1.01%). The research provided technol. supports for exploitation and quality control of cocoa extract

Xiangliao Xiangjing Huazhuangpin published new progress about 68527-74-2. 68527-74-2 belongs to dioxole, auxiliary class Dioxolane,Benzene,Phenol,Ether, name is 2-Methoxy-4-(4-methyl-1,3-dioxolan-2-yl)phenol, and the molecular formula is C11H14O4, Product Details of C11H14O4.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Umeda, Rui published the artcileDesymmetrization of 1,4-Cyclohexadienyltriisopropoxysilane Using Copper Catalysis, Application In Synthesis of 503538-69-0, the publication is Organic Letters (2007), 9(11), 2175-2178, database is CAplus and MEDLINE.

The first catalytic desymmetrization in the field of allylsilane chem. is presented. Desymmetrization of cyclohexadienyltriisopropoxysilane is achieved using copper catalysis. High diastereo- and enantioselectivities are obtained, and the product dienes are highly valuable building blocks for natural product synthesis.

Organic Letters published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C7H5Cl2NO, Application In Synthesis of 503538-69-0.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Mykhailiuk, Pavel K. published the artcile1-Amino-4,4-difluorocyclohexanecarboxylic acid as a promising building block for drug discovery: design, synthesis and characterization, HPLC of Formula: 177-10-6, the publication is Tetrahedron (2013), 69(20), 4066-4075, database is CAplus.

1-Amino-4,4-difluorocyclohexanecarboxylic acid has been designed as a fluorinated analog of the pharmacol. relevant 1-aminocyclohexanecarboxylic acid. The synthesis has been performed in three steps from a com. available material in 22% overall yield. An impact of fluorine atoms on conformation, lipophilicity, acidity and fluorescent properties of the amino acid has been studied. Various practical applications of the obtained compound are suggested.

Tetrahedron published new progress about 177-10-6. 177-10-6 belongs to dioxole, auxiliary class Dioxolane,Spiro, name is 1,4-Dioxaspiro[4.5]decane, and the molecular formula is C8H14O2, HPLC of Formula: 177-10-6.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem