Month: April 2022

Ishibashi, Fumito; Hayashita, Mami; Okazaki, Momotoshi; Shuto, Yoshihiro published an article about the compound: (R)-4-Hydroxydihydrofuran-2(3H)-one( cas:58081-05-3,SMILESS:O=C1OC[C@H](O)C1 ).COA of Formula: C4H6O3. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:58081-05-3) through the article.

Short enantiomeric syntheses of the 1-hydroxy/acetoxy-3,7-dioxabicyclo[3.3.0]octane lignans, (+)-paulownin (I, R1 = R2 = R3 = H), and (+)-phrymarin I (I, R1 = R2 = OMe, R3 = Ac) and II (I, R1 = OMe, R2 = H, R3 = Ac), were accomplished by starting from the chiral synthon, (R)-(+)-3-hydroxybutanolide, and employing photocyclization as the key step.

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Reference:
Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Tetrahedron Letters called Magnesium ethoxide mediated lactone aminolysis with aminoheterocycles, Author is Mercado-Marin, Eduardo V.; Chheda, Pratik Rajesh; Faulkner, Andrea; Carrera, Diane, which mentions a compound: 58081-05-3, SMILESS is O=C1OC[C@H](O)C1, Molecular C4H6O3, COA of Formula: C4H6O3.

A mild method for the aminolysis of lactones with aminoheterocycles in the presence of magnesium ethoxide was described. A wide range of electronically diverse aminoheterocycles and substituted lactones successfully participated in this transformation to furnish the resulting amido-alc. products. Further application of this method to the synthesis of chiral α-amino amides derivatives was also described.

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Reference:
Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 59782-89-7, is researched, SMILESS is CC1=CC(I)=CN=C1Cl, Molecular C6H5ClINJournal, Organic Preparations and Procedures International called An improved procedure for the oxidation of 2,5- and 5,6-dihalo-3-methylpyridines, Author is Setliff, F. L.; Huie, W. R.; Adams, R. L., the main research direction is nicotinic acid dihalo; halonicotinic acid; methyldihalopyridine oxidation ammonium permanganate.Computed Properties of C6H5ClIN.

Nicotinic acids I (R = Br, Cl, F; R1 = iodo, Br, Cl) were obtained from methylpyridines II and Bu4N+ MnO4-. Similarly prepared were acids III (R2 = Br, Cl). 5,6-Dibromo-3-methylpyridine in pyridine was oxidized by Bu4N+ MnO4- at 75-80° to give III (R2 = Br).

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Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem

Quality Control of (R)-4-Hydroxydihydrofuran-2(3H)-one. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (R)-4-Hydroxydihydrofuran-2(3H)-one, is researched, Molecular C4H6O3, CAS is 58081-05-3, about Synthesis of a new cerebroside isolated from Typhonium giganteum Engl. Author is Chen, Xue-Song; Wu, Yu-Lin; Chen, Di-Hua.

The stereoselective synthesis of typhoniside, a new cerebroside isolated from Typhonium giganteum Engl. was accomplished. Cerebrosides are a kind of glycolipids highly enriched on the surface of myelin-producing cells and are composed by C18-4, 8-sphingadienine, α-hydroxy acid and a saccharide head. In this paper, C18-4, 8-sphingadienine was synthesized from D-xylose via a SN2 type reaction. α-Hydroxy acid was prepared from (R)-4-hydroxyte-trahydrofuran-2-one, which in turn could be obtained from L-ascorbic acid.

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Reference:
Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem

Synthetic Route of C4H6O3. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (R)-4-Hydroxydihydrofuran-2(3H)-one, is researched, Molecular C4H6O3, CAS is 58081-05-3, about A modular approach to marine macrolide construction. 2. Concise stereocontrolled synthesis of the C17-C28 (CD) spiroacetal component. Author is Paquette, Leo A.; Braun, Alain.

The CD spiroacetal ring system (I) of altohyrtin A, which houses one-fifth of the stereogenic centers resident in the macrolide, has been synthesized through a combination of aldol condensations having different stereocontrol elements.

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Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem

SDS of cas: 4045-24-3. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 4-Methoxypiperidine, is researched, Molecular C6H13NO, CAS is 4045-24-3, about Three-component radical homo Mannich reaction. Author is Shi, Shuai; Qiu, Wenting; Miao, Pannan; Li, Ruining; Lin, Xianfeng; Sun, Zhankui.

By employing a radical process, enolizable aldehydes were utilized as substrates in the three-component radical homo-Mannich reaction for the streamlined synthesis of γ-amino-carbonyl compounds. The electrophilic radicals were generated from thiols HSCHR1C(O)R2 (R1 = H, Me; R2 = Me, EtO, PhCH2O, 1-adamantyl, Et2N, etc.) via the desulfurization process facilitated by visible-light, and then added to the electron-rich double bonds of enamines, formed in-situ from aldehydes or ketones R3CH2C(O)R4 [R3 = H, Et, MeSCH2, Ph, PhCH2, etc., R4 = H; R3 = H, R4 = Ph, 3-FC6H4, etc.; R3R4 = (CH2)5, CH2CHPhCH2CH2, CH2N(CH2Ph)CH2CH2, etc.] and amines R5NHR6 [R5 = Me, R6 = H2C:CHCH2, PhCH2, cyclohexyl, etc.; R5 = PhCH2, R6 = PhCH2, EtO2CCH2, etc.; R5R6 = (CH2)4, CHPh(CH2)3, etc.] to provide the products I in a single step. The broad scope, mild conditions, high functional group tolerance, and modularity of this metal-free approach for the synthesis of complex tertiary amine scaffolds will likely be of great utility to chemists in both academia and industry.

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Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Tetrahedron Letters called Asymmetric syntheses of (R)-4-halo-6,6a,7,8,9,10-hexahydro-5H-pyrazino[1,2-a][1,n]naphthyridines, important 5-HT2C agonist precursors, Author is Schrader, Thomas O.; Zhu, Xiuwen; Kasem, Michelle; Li, Sufang; Liu, Chunyan; Ren, Albert; Wu, Chunrui; Semple, Graeme, which mentions a compound: 34941-92-9, SMILESS is ClC1=CC(=NC=C1)F, Molecular C5H3ClFN, Synthetic Route of C5H3ClFN.

Asym. syntheses of N-protected (R)-4-halo-6,6a,7,8,9,10-hexahydro-5H-pyrazino[1,2-a][1,n]naphthyridines, advanced intermediates for the synthesis of highly potent and selective 5-HT2C agonists, are described. The key transformation involves ring opening of N-protected bicyclic sulfamidate (R)-hexahydro-3H-pyrazino[1,2-c][1,2,3]oxathiazine 1,1-dioxide with (4-halo-2-fluoropyridin-3-yl)lithiums or (3-bromo-5-fluoropyridin-4-yl)lithium. In situ hydrolyzes of the resultant sulfamic acids and subsequent intramol. nucleophilic aromatic substitutions (SNAr) produce the enantiopure tricycles. The two step procedure represents new methodol. for the stereoselective syntheses of tetrahydronaphthyridines.

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Reference:
Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem