Pyridine-derivatives

Synthetic Route of C5H5BrN2On March 4, 2020, Biot, Nicolas; Bonifazi, Davide published an article in Chemistry – A European Journal. The article was 《Concurring Chalcogen- and Halogen-Bonding Interactions in Supramolecular Polymers for Crystal Engineering Applications》. The article mentions the following:

The engineering of crystalline mol. solids through the simultaneous combination of distinctive non-covalent interactions is an important field of research, as it could allow chemist to prepare materials depicting multi-responsive properties. It is in this context that, pushed by a will to expand the chem. space of chalcogen-bonding interactions, a concept is put forward for which chalcogen- and halogen-bonding interactions can be used simultaneously to engineer multicomponent co-crystals. Through the rational design of crystallizable mols., chalcogenazolo pyridine scaffold (CGP) modules were prepared that, bearing either a halogen-bond acceptor or donor at the 2-position, can interact with suitable complementary mol. modules undergoing formation of supramol. polymers at the solid state. The recognition reliability of the CGP moiety to form chalcogen-bonded dimers allows the formation of heteromol. supramol. polymers through halogen-bonding interactions, as confirmed by single-crystal X-ray diffraction anal. The results came from multiple reactions, including the reaction of 2-Bromopyridin-3-amine(cas: 39856-58-1Synthetic Route of C5H5BrN2)

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. Milder oxidation, using reagents such as NaOCl, can remove four hydrogen atoms from primary amines of the type RCH2NH2 to form nitriles (R―C≡N), and oxidation with reagents such as MnO2 can remove two hydrogen atoms from secondary amines (R2CH―NHR′) to form imines (R2C=NR′). Tertiary amines can be oxidized to enamines (R2C=CHNR2) by a variety of reagents.Synthetic Route of C5H5BrN2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application In Synthesis of 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridineOn November 1, 2013 ,《Chiral Lewis Acid Catalyzed Asymmetric Cycloadditions of Carbonyl Ylides Generated from Diazoimide Derivatives and Their Synthetic Applications to Indolizidine Alkaloids》 appeared in Journal of Organic Chemistry. The author of the article were Suga, Hiroyuki; Hashimoto, Yuta; Yasumura, Shingo; Takezawa, Ryota; Itoh, Kennosuke; Kakehi, Akikazu. The article conveys some information:

Highly enantioselective 1,3-dipolar cycloaddition reactions, catalyzed by chiral Lewis acids, between several 3-(2-alkenoyl)-2-oxazolidinones I (R = H, Me, Et, n-Pr, iso-Pr, OAc) and carbonyl ylides that were generated from N-diazoacetyl lactams II [X = (CH2)n, n = 1, 2, 3] are described. Reactions of N-diazoacetyl lactams that possess 5-, 6-, and 7-membered rings were transformed to the corresponding epoxy-bridged indolizidines, quinolizidines, and 1-azabicyclo[5.4.0]-undecanes with good to high enantioselectivities. Regio- and stereoselective ring-opening of the epoxy-bridged indolizidine cycloadduct gave the corresponding alc. as a single diastereomer. The sequence of asym. cycloaddition followed by ring-opening was applied to the syntheses of several chiral indolizidine derivatives, including (+)-tashiromine (III).2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine(cas: 410092-98-7Application In Synthesis of 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine) was used in this study.

2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine(cas: 410092-98-7) belongs to pyridine derivatives. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals. Application In Synthesis of 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Abe, Aki M. M.; Sauerland, Sami J. K.; Koskinen, Ari M. P. published an article in Journal of Organic Chemistry. The title of the article was 《Highly Enantioselective Conjugate Addition of Thiols Using Mild Scandium Triflate Catalysis》.SDS of cas: 410092-98-7 The author mentioned the following in the article:

A Sc complex of the bis[(4S,5S)-diphenyloxazolinyl]pyridine I, diphenyl-PYBOX, catalyzed the asym. conjugate addition reactions between thiols and 3-crotonoyl-2-oxazolidinone to give the corresponding adducts, e.g. butanoyloxazolidine II, in good yields and high enantioselectivity (up to 92% ee). A new improved method for making (4S,5S)-diphenyl PYBOX was presented. The experimental part of the paper was very detailed, including the reaction process of 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine(cas: 410092-98-7SDS of cas: 410092-98-7)

2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine(cas: 410092-98-7) belongs to pyridine derivatives. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals. SDS of cas: 410092-98-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Fulopova, Veronika; Gucky, Tomas; Grepl, Martin; Soural, Miroslav published their research in ACS Combinatorial Science on December 10 ,2012. The article was titled 《Solid-Phase Synthesis of Trisubstituted Benzo[1,4]-Diazepin-5-one Derivatives》.Application In Synthesis of 3-Nitroisonicotinic acid The article contains the following contents:

Solid-phase synthesis of 3,4-dihydro-benzo[e][1,4]diazepin-5-ones with three diversity positions is described. Various primary amines were used as the starting material and immobilized on the polystyrene resin equipped with different acid-labile linkers. Polymer-supported amines were converted to α-amino ketones with the use of their sulfonylation with the 4-nitrobenzenesulfonyl chloride (4-Nos-Cl) and subsequent alkylation with α-bromo ketones. After the cleavage of the 4-Nos group, the corresponding α-amino ketones were acylated with various o-nitrobenzoic acids. Reduction of the nitro group followed by spontaneous on-resin ring closure gave the target immobilized benzodiazepines. After acid-mediated cleavage the products were obtained in very good crude purity and satisfactory yields, which makes the developed method applicable for simple library synthesis of the corresponding derivatives in a combinatorial fashion. In the part of experimental materials, we found many familiar compounds, such as 3-Nitroisonicotinic acid(cas: 59290-82-3Application In Synthesis of 3-Nitroisonicotinic acid)

3-Nitroisonicotinic acid(cas: 59290-82-3) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Application In Synthesis of 3-Nitroisonicotinic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 1971,Australian Journal of Chemistry included an article by Deady, L. W.; Shanks, R. A.; Campbell, Arthur Derek; Chooi, S. Y.. Related Products of 29681-39-8. The article was titled 《Synthesis of some substituted methyl pyridinecarboxylates. II. Methyl 4-substituted picolinates, methyl 5-substituted picolinates, and methyl 5-substituted nicotinates》. The information in the text is summarized as follows:

The preparation of substituted Me pyridinecarboxylates is described. Me 4-X-substituted picolinates and methyl 5-X-substituted picolinates (X = NO2, Br, MeO, Me2N) are prepared from 2-picoline via 4-nitro-2-picoline N-oxide and 2-amino-5-nitropyridine, resp. Me 5-X-substituted nicotinates (X = Br, MeO, Me2N) are prepared from 5-bromonicotinic acid. Preparations of Me 4-methylpicolinate and Me 5-methylnicotinate from the corresponding lutidines and Me 5-methylpicolinate from 2-amino-5-methylpyridine are described. In the experiment, the researchers used many compounds, for example, Methyl 5-methoxypicolinate(cas: 29681-39-8Related Products of 29681-39-8)

Methyl 5-methoxypicolinate(cas: 29681-39-8) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Related Products of 29681-39-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,Chemistry – A European Journal included an article by Kader, Thomas; Stoeger, Berthold; Froehlich, Johannes; Kautny, Paul. Related Products of 39856-58-1. The article was titled 《Azaindolo[3,2,1-jk]carbazoles: New Building Blocks for Functional Organic Materials》. The information in the text is summarized as follows:

The preparation and characterization of 12 azaindolo[3,2,1-jk]carbazoles, e.g., I was presented. Ring-closing C-H activation allowed for the convenient preparation of six singly and six doubly nitrogen-substituted indolo[3,2,1-jk]carbazole derivatives in which ten of the materials had not been described in the literature before. The detailed photophys. and electrochem. characterization of the developed materials revealed a significant impact of the incorporation of pyridine-like nitrogen into the fully planar indolo[3,2,1-jk]carbazole backbone. Furthermore, the nitrogen position decisively impacted intermol. hydrogen bonding and thus the solid-state alignment. Ultimately, the versatility of the azaindolo[3,2,1-jk]carbazoles scaffold makes this class of materials an attractive new building block for the design of functional organic materials. In the part of experimental materials, we found many familiar compounds, such as 2-Bromopyridin-3-amine(cas: 39856-58-1Related Products of 39856-58-1)

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. Hydrogen peroxide (H2O2) and peroxy acids generally add an oxygen atom to the nitrogen of amines. With primary amines, this step is normally followed by further oxidation, leading to nitroso compounds, RNO, or nitro compounds, RNO2. Secondary amines are converted to hydroxylamines, R2NOH, and tertiary amines to amine oxides, R3NO.Related Products of 39856-58-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Khavasi, Hamid Reza; Esmaeili, Maryam published their research in Crystal Growth & Design on August 7 ,2019. The article was titled 《Case Study of the Correlation between Metallogelation Ability and Crystal Packing》.HPLC of Formula: 112881-51-3 The article contains the following contents:

In the present paper, in order to find the correlation between the mol. structure and the intermol. interaction patterns in the crystalline state and the corresponding gelating or nongelating behavior, two structurally related sets of copper complexes, including (CuCl2[L2pyTerpy]), 1, (CuCl2[L3pyTerpy]), 2, and (CuCl2[L4pyTerpy]), 3, (where LnpyTerpy is 4′-(n-pyridyl)-2,2′,6′,2”-terpyridine) as the first set and (CuCl2[L2pydipyz-py]), 4, (CuCl2[L3pydipyz-py]), 5, and (CuCl2[L4pydipyz-py]), 6, (where Lnpydipyz-py is 4-(n-pyridyl)-2,6-dipyrazin-2-yl-pyridine) as the second one, have been synthesized, and their crystal packing as well as gelating properties have been investigated. Results show that although these two sets are structurally similar the first set forms a metastable hydrogel, while the second one is unable to form a gel. To investigate the reasons, we employed Hirshfeld surface anal. and examined the differences in their packing arrangements, which suggest hydrogen bonding arranged into the three-dimensional network is a preferred mode of packing for the crystalline solid but is unfavorable for gel formation. In the part of experimental materials, we found many familiar compounds, such as 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3HPLC of Formula: 112881-51-3)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals. HPLC of Formula: 112881-51-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Suga, Hiroyuki; Sekikawa, Yurie; Misawa, Shunta; Kinugawa, Daito; Oda, Rinnosuke; Itoh, Kennosuke; Toda, Yasunori; Kiyono, Ryotaro published an article in Journal of Organic Chemistry. The title of the article was 《Chiral Lewis Acid-Catalyzed Enantioselective Cycloadditions between Indoles and Cyclic Carbonyl Ylides Derived from Diazodiketone or Diazoketoester Derivatives》.Safety of 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine The author mentioned the following in the article:

Asym. 1,3-dipolar cycloaddition reactions between N-methylindoles and several cyclic carbonyl ylides that were derived from diazodiketone or diazoketoester precursors in the presence of both achiral Rh and chiral lanthanoid metal catalysts are described. For the six-membered cyclic carbonyl ylides derived from 1-diazo-5-aryl-2,5-pentanedione precursors, the cycloaddition reactions were carried out using Rh2(OAc)4 (2 mol %) and the chiral Pybox-Ph2-Lu(OTf)3 complex (10 mol %) as catalysts, resulting in high enantioselectivities (83% to >98% ee (exo)) along with relatively good exo-selectivities (exo:endo = 65:35 to 94:6) and yields (63-85%). For the five-membered cyclic carbonyl ylide derived from 1-diazo-2,4-pentanedione precursor, the cycloaddition reaction with 5-bromo-1-methylindole was carried out in the presence of Rh2(OAc)4 (2 mol %) and the chiral Pybox-Ph2-Er(OTf)3 complex (30 mol %) as catalysts, resulting in relatively good enantioselectivity (78% ee) and endo-selectivity (endo:exo = 81:19). The experimental process involved the reaction of 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine(cas: 410092-98-7Safety of 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine)

2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine(cas: 410092-98-7) belongs to pyridine derivatives. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals. Safety of 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Chiral Calcium Iodide for Asymmetric Mannich-type Reactions of Malonates with Imines Providing β-Aminocarbonyl Compounds》 were Tsubogo, Tetsu; Shimizu, Shota; Kobayashi, Shu. And the article was published in Chemistry – An Asian Journal in 2013. Synthetic Route of C35H27N3O2 The author mentioned the following in the article:

We have developed a novel chiral calcium iodide catalyst prepared from CaI2 and pybox [2,6-bis(2-oxazolinyl)pyridine] that is stable under moisture and oxygen. This catalyst was applied to catalytic asym. Mannich-type reactions of malonates with both N-Boc-protected aromatic and aliphatic imines, and gave moderate to high yields of β-aminocarbonyl compounds with high enantioselectivities. The Mannich adduct was also successfully converted into an α-hydroxy β-amino acid derivative In the experiment, the researchers used 2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine(cas: 410092-98-7Synthetic Route of C35H27N3O2)

2,6-Bis((4S,5S)-4,5-diphenyl-4,5-dihydrooxazol-2-yl)pyridine(cas: 410092-98-7) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Synthetic Route of C35H27N3O2 Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wu, Chunjiang; Xu, Shan; Guo, Yuping; Wu, Jielian; Luo, Rong; Wang, Wenhui; Tu, Yuanbiao; Le Chen; Zhu, Wufu; Zheng, Pengwu published an article on February 28 ,2018. The article was titled 《Design, synthesis and biological evaluation of phenylpicolinamide sorafenib derivatives as antitumor agents》, and you may find the article in Medicinal Chemistry Research.HPLC of Formula: 1158763-55-3 The information in the text is summarized as follows:

Two series of phenylpicolinamide sorafenib derivatives (14a-k, 15a-k) were designed and synthesized. They were evaluated for IC50 values against three cancer cell lines (A549, Hela, and MCF-7) and VEGFR2/KDR, BRAF, and CRAF kinases. Fourteen target compounds showed moderate to excellent cytotoxicity activity against the different cancer cells with potency from the single-digit μM to nanomole range. What’s more, six of them were equal to more potent than sorafenib against one or more cell lines. Most of the compounds showed bad activity against VEGFR2/KDR, BRAF, or CRAF kinases. The most promising compound 15f showed strong antitumor activities against A549 and MCF-7 cell lines with IC50 values of 5.43 ± 0.74 and 0.62 ± 0.21 μM, which were 1.29-6.79-fold more active than sorafenib (6.53 ± 0.82, 4.21 ± 0.62 μM), resp. and it exhibited moderate IC50 (7.1 μM) than 14f (IC50 = 3.1 μM). Structure-activity relationships (SARs) and docking studies indicated that replacement of diarylurea of sorafenib with phenylpicolinamide moiety benefits to the activity. The position of aryl group and the substitutions of aryl group have a great influence on antitumor activity and selectivity. Small volume groups of aryl group such as (substituted) alkyl groups (-CH3, -CF3), halogen atoms (-F) were favorable to the cytotoxicity. Exact action mechanism of target compounds is not quite clear and further study will be carried out to identify the target in near future. After reading the article, we found that the author used 5-(3-Fluorophenyl)picolinic acid(cas: 1158763-55-3HPLC of Formula: 1158763-55-3)

5-(3-Fluorophenyl)picolinic acid(cas: 1158763-55-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. HPLC of Formula: 1158763-55-3The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem