Month: November 2022

On January 31, 1974, Fleckenstein, Erwin; Heinrich, Ernst; Mohr, Reinhard published a patent.HPLC of Formula: 51566-22-4 The title of the patent was Pyridine derivatives. And the patent contained the following:

Pyridine derivatives I (R and R1 = amino, alkoxy, alkylthio, CN, Cl) (642 compounds) were prepared by substitution reactions on I (R = R1 = Cl). The experimental process involved the reaction of 3-Methylpyridine-2,6-diamine(cas: 51566-22-4).HPLC of Formula: 51566-22-4

The Article related to pyridine dichloro substitution, substitution dichloropyridine, dye intermediate poridine, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.HPLC of Formula: 51566-22-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 16, 2008, Beaton, Graham; Chen, Mi; Coon, Timothy Richard; Ewing, Todd; Jiang, Wanlong; Lowe, Richard; Moree, Willy; Smith, Nicole; Wade, Warren; Zhao, Liren; Zhu, Yun-Fei; Rowbottom, Martin; Ashweek, Neil published a patent.Synthetic Route of 156267-13-9 The title of the patent was Preparation of benzenecarboxamide derivatives as Gonadotropin-releasing hormone receptor antagonists. And the patent contained the following:

Title compounds represented by the formula I [wherein A = pyridyl, Ph, quinolinyl, etc.; R1a = H, halo, alkyl, etc.; R1b, R1c = independently H, halo, OH, etc.; R1d = F, Cl, Me, CF3 or cyano; R2 = alkyl-(R5)p; R2a = (un)substituted Ph, (hetero)aryl or alkyl; R5 = independently H, OH, amino, etc.; p = 1-3; and stereoisomers, esters, solvates, and pharmaceutically acceptable salts thereof] were prepared as Gonadotropin-releasing hormone receptor (GnRH) antagonists. For example, II was provided in a multi-step synthesis starting from 3-bromo-4-chlorobenzoic acid. I were tested in one or more of the peptide competitive human receptor binding assays and showed Ki values of 1 μM or less. Thus, I and their pharmaceutical compositions are useful for the treatment of a variety of sex-hormone related conditions in both men and women. The experimental process involved the reaction of N,3-Dimethylpyridin-2-amine(cas: 156267-13-9).Synthetic Route of 156267-13-9

The Article related to benzenecarboxamide pyridinyl preparation gonadotropin releasing hormone receptor antagonist, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Synthetic Route of 156267-13-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 16, 2008, Ashweek, Neil; Chen, Mi; Coon, Timothy Richard; Ewing, Todd; Jiang, Wanlong; Moree, Willy; Rowbottom, Martin; Wade, Warren; Zhao, Liren; Zhu, Yun-Fei; Yu, Jinghua; Beaton, Graham published a patent.Related Products of 156267-13-9 The title of the patent was Preparation of benzenesulfonylamide derivatives as Gonadotropin-releasing hormone receptor antagonists. And the patent contained the following:

Title compounds represented by the formula I [wherein A = pyridyl, Ph, quinolinyl, etc.; R1a = H, halo, alkyl, etc.; R1b, R1c = independently H, halo, OH, etc.; R1d = F, Cl, Me, CF3 or cyano; R2 = alkyl-(R5)p; R2a = (un)substituted Ph, aryl, alkyl, etc.; or R2R2a = (un)substituted heterocycle; R5 = independently H, OH, amino, etc.; p = 1-3; and stereoisomers, esters, solvates, and pharmaceutically acceptable salts thereof] were prepared as Gonadotropin-releasing hormone receptor (GnRH) antagonists. For example, II was provided in a multi-step synthesis starting from 1-bromo-2-chloro-4-fluorobenzene. I were tested in one or more of the peptide competitive human receptor binding assays and showed Ki values of 1 μM or less. Thus, I and their pharmaceutical compositions are useful for the treatment of a variety of sex-hormone related conditions in both men and women. The experimental process involved the reaction of N,3-Dimethylpyridin-2-amine(cas: 156267-13-9).Related Products of 156267-13-9

The Article related to benzenesulfonylamide pyridinyl preparation gonadotropin releasing hormone receptor antagonist, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Related Products of 156267-13-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On March 3, 1998, Kanda, Yoichi; Saito, Koki; Sato, Tsutomu published a patent.Application of 90764-84-4 The title of the patent was Preparation of N-(phenylsulfonyl)picolinamides and herbicides containing them. And the patent contained the following:

Title compounds I [X = halo, C1-4 (halo)alkyl, C1-4 (halo)alkoxy, (C1-4 alkoxy)carbonyl, (di)(C1-4 alkyl)aminosulfonyl, C1-4 alkylthio, C1-4 alkylsulfinyl, C1-4 alkylsulfonyl, NO2; Y = halo, C1-4 (halo)alkyl, C1-4 (halo)alkoxy, C1-4 (halo)alkylthio, NH2, (di)(C1-4 alkyl)amino, (C1-4 alkoxy)(C1-4 alkyl), (C1-4 alkylthio)(C1-4 alkyl), NO2; m = 0-4; n = 0-5], useful as herbicides, are prepared by (A) condensation of picolinic acids II (R = H; Y, m = same as I) with XnC6H5-nSO2NH2 (III; X, n = same as I) or (B) reaction of II (R = C6H5-sZs; Z = halo, C1-4 alkyl, C1-4 alkoxy, NO2; s = 0-5) with III in the presence of bases. III (Xn = 2,6-Cl2) was treated with NaH in DMF and treated with II (R = Ph, Ym = 5-OMe-6-Cl) at 70° for 1 h to give 70.7% I (Xn = 2,6-Cl2, Ym = 5-OMe-6-Cl). Herbicidal activity of I was tested for 11 kinds of weeds. The experimental process involved the reaction of 4,6-Dimethoxypicolinic acid(cas: 90764-84-4).Application of 90764-84-4

The Article related to picolinamide phenylsulfonyl preparation herbicide, benzenesulfonamide amidation picolinic acid, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Application of 90764-84-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 28, 1990, Sobotka, Wieslaw; Styczynska, Bogumila; Balicki, Roman; Kozlowska, Margarita; Krzeminska, Alicja; Kaczmarek, Lukasz; Ejmocki, Zdzislaw published a patent.Quality Control of [2,2′-Bipyridine]-3,3′-diamine The title of the patent was Preparation of new bis[3-(2,6-disubstituted benzoyl)-1-ureyl]bipyridines as insecticides. And the patent contained the following:

Title compounds I (R, R1 = H, C1-4 alkoxy, halo, CF3) are prepared by reaction of corresponding disubstituted benzoyl isocyanates with bipyridine diamines in an inert solvent at 20-120°. For example, 4,4′-bipyridine-3,3′-diamine reacted with 2 mol equiv 2,6-ClFC6H3CONCO in CH2Cl2 at 40° to give 86.3% title compound II. Eight I showed varying degrees of effectiveness as chitin synthesis inhibitors when applied to larval Musca domestica. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Quality Control of [2,2′-Bipyridine]-3,3′-diamine

The Article related to benzoylureylbipyridine preparation insecticide, bipyridine benzoylureyl preparation chitin inhibitor, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Quality Control of [2,2′-Bipyridine]-3,3′-diamine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On May 19, 2022, Kopf, Sara; Liu, Jiali; Franke, Robert; Jiao, Haijun; Neumann, Helfried; Beller, Matthias published an article.Recommanded Product: 109660-12-0 The title of the article was Base-Mediated Remote Deuteration of N-Heteroarenes – Broad Scope and Mechanism. And the article contained the following:

Using KOtBu as base and DMSO-d6 as deuterium source, a general and applicable method was presented for the selective deuteration of a set of nitrogen-containing heterocycles (pyridines, azines and bioactive mols.). Exptl. and DFT mechanistic studies indicated that this reaction proceeded via deprotonation of the substrates by the dimsyl anion. The relative thermodn. stability of the heterocycle anions determines the distribution and degree of deuteration. The experimental process involved the reaction of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine(cas: 109660-12-0).Recommanded Product: 109660-12-0

The Article related to heteroarene deuterated dimethyl sulfoxide regioselective deuteration, deuterated heteroarene preparation, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Recommanded Product: 109660-12-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Cremlyn, Richard J.; Jones, Graham P.; Swinbourne, Fred J.; Yung, Kin published an article in 1980, the title of the article was Some reactions of pyridine-3-sulfonyl chloride.Reference of Pyridine-3-sulfonic acid And the article contains the following content:

Reaction of pyridine-3-sulfonyl chloride-HCl (I) with hydrazine gave the hydrazide from which a semicarbazide and a series of hydrazones were obtained. The chem. shifts of the NH protons of the hydrazones were correlated with the Hammett σ-constants of the substituents. With NaN3 I gave the azide which reacted with both norbornene and Ph3P. I was hydrolyzed to the sulfonic acid by boiling with EtOH. Reaction of the hydrazide with β-diketones afforded the pyrazoles, e.g. II. The intermediate sulfonohydrazones were isolated in each case; however, the product with Et acetoacetate could not be cyclised to the pyrazole. The mass spectra of the pyrazoles are briefly discussed. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Reference of Pyridine-3-sulfonic acid

The Article related to pyridinesulfonyl chloride reaction, nmr pyridinesulfonyl hydrazone hammett constant, pyrazole pyridylsulfonyl, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Reference of Pyridine-3-sulfonic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On December 31, 1985, Kaczmarek, Lukasz published an article.Electric Literature of 75449-26-2 The title of the article was Bipyridines. Part XVIII. On the synthesis of [2,2′-bipyridin]-3-ol and other novel 2,2′-bipyridine derivatives from [2,2′-bipyridine]-3,3′-diamine. And the article contained the following:

Diazotization of bipyridinediamine I (R = R1 = NH2) in AcOH gave hydroxylamines I (R = NHOH, R1 = H, Ac); however, diazotization of Cu(II) complex of I (R = R1 = NH2) gave bipyridinamine I (R = NH2, R1 = H). Diazotization of the latter gave bipyridinol I (R = OH, R1 = H). The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Electric Literature of 75449-26-2

The Article related to bipyridinediamine diazotization, bipyridinamide preparation diazotization, bipyridinol, bipyridinehydroxylamine, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Electric Literature of 75449-26-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 28, 1985, Sakamoto, Takao; Kaneda, Sohichi; Nishimura, Sumiko; Yamanaka, Hiroshi published an article.Computed Properties of 97483-79-9 The title of the article was Site-selectivity in the cyanation of 3-substituted pyridine 1-oxides with trimethylsilanecarbonitrile. And the article contained the following:

Treatment of pyridine 1-oxides I (R = Br, Cl, F, OMe, NMe2, Me, Et, Ph, CONEt2, CO2Et, cyano) with Me3SiCN gave 2- and 6-cyanopyridines II and III. The II – III ratio was strongly influenced by R, with II being the only product when R = F, OMe, NMe2. Nitropyridine 1-oxides underwent deoxygenation but not cyanation with Me3SiCN. The experimental process involved the reaction of Ethyl 6-cyanopicolinate(cas: 97483-79-9).Computed Properties of 97483-79-9

The Article related to pyridine oxide trimethylsilyl cyanide cyanation, cyanopyridine, deoxygenation pyridine oxide trimethylsilyl cyanide, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Computed Properties of 97483-79-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Breant, P.; Marsais, F.; Queguiner, G. published an article in 1983, the title of the article was Regioselective lithiation of 3-pyridylsulfonic acid derivatives: a convenient route to various new 4-substituted 3-pyridylsulfonamides.Computed Properties of 636-73-7 And the article contains the following content:

Pyridinesulfonamides I [NR2 = piperidino, morpholino, pyrrolidino; R1 = C(OH)Ph2, (un)substituted α-hydroxybenzyl] were prepared from lithiopyridines II and the resp. carbonyl compounds Amide III was treated at -60° with (Me2CH)2NH and BuLi in Et2O, PhCHO in Et2O was added at -70°, and the mixture was stirred 2 h at -70° to give I [NR2 = piperidino, R1 = PhCH(OH)]. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Computed Properties of 636-73-7

The Article related to addition lithiopyridinesulfonamide benzaldehyde, pyridinesulfonamide hydroxybenzyl, hydroxybenzylpyridinesulfonamide, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Computed Properties of 636-73-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem