Day: February 22, 2023

Amidines. XVI. A new synthesis of 1-alkyl- and 1-aryl-3, 4-dihydroisoquinolines was written by Brodrick, C. I.;Short, W. F.. And the article was included in Journal of the Chemical Society in 1951.COA of Formula: C15H13N This article mentions the following:

PhCN (10.3 g.) and 12.1 g. PhCH₂CH₂NH₂ (I), treated with 13.4 g. AlCl₃ (20-30 s.) (temperature rise to 220°), heated 30 min. at 165-75°, cooled to 130°, poured into 500 cc. H₂O, the unchanged PhCN (0.2 g.) extracted with ether, the solution made alk. (pH 11), and extracted with C₆H₆, give 55% N-(2-phenylethyl)benzamidinium chloride (II), m. 182-3°; picrate (IIA), lemon yellow, m. 173-4°; the mother liquors yield N, N’-bis(2-phenylethyl)benzamidinium picrate (III), yellow, m. 170-1°; a poor quality of AlCl₃ gave 3.5% III, 74% unchanged PhCN, and 60% I. The low yield of II (47% by the Pinner method) may have been the result of the presence of moisture. PhCH₂CN (23.4 g.), 24.2 g. I, and 26.8 g. AlCl₃ (240°) give 28% of the α-Ph derivative (IV), of III, m. 173.5-4.5°; picrate, m. 113-14°; if the melt is heated 45 min. at 185°, the yield of IV is 21% and 13% PhCH₂CN is recovered. p-NCC₆H₄SO₂Me (18.1 g.), 12.1 g. I, and 13.4 g. AlCl₃(190°) give 2.6% unchanged cyanide and 55% of the p-methylsulfonyl derivative (V) of III, m. 264-5°; picrate, m. 168-8.5°. p-MeOC₆H₄CN (13.3 g.), 12.1 g. I, and 13.4 g. AlCl₃ (140°) give 22% unchanged cyanide, and 52.5% of the p-methoxyphenyl analog (VI) of I, m. 223-3.5°; 3, 4-dimethoxyphenyl analog of I, m. 200.5-1.5° (13%); picrate, orange yellow, m. 165-6°. 3-Cyanopyridine (10.4 g.), 12.1 g. I, and 13.4 g. AlCl₃ (210°) yield 36% (crude) N-2-phenylethylnicotineamidine, m. 131-1.5°; dipicrate, m. 174-5°. AmCN (8 g.), 10 g. I, and 11 g. AlCl₃ (170°) give N-2-phenylethylhexanamidine, as the benzenesulfonate, m. 74-5°. II (7.8 g.) in 81 cc. PhNO₂ and 27 cc. POCl₃, refluxed 2.5 h., gives 43% 3, 4-dihydro-1-phenylisoquinoline, b_1.2 145-54°; V yields 9.7% of the 1-(p-methylsulfonylphenyl) analog as the picrate, yellow, m. 192-2.5°; HCl salt, m. 267-8°. VI gives 3,4-dihydro-1-(p-methoxyphenyl)isoquinoline-HCl, with 1 mol. MeOH, m. 199-200°; it also seps. with 2 mols. H₂O, anhydrous, m. 212-14°; picrate, m. 161.5°. 3,4-Dihydro-1-(3-pyridyl)isoquinoline, b_0.5 155°; dipicrate, m. 196-7°; 1-amyl-3,4-dihydroisoquinoline picrate, m. 112.5-13°. In the experiment, the researchers used many compounds, for example, 1-Phenyl-3,4-dihydroisoquinoline (cas: 52250-50-7COA of Formula: C15H13N).

1-Phenyl-3,4-dihydroisoquinoline (cas: 52250-50-7) belongs to isoquinoline derivatives. The isoquinoline structure occurs in a considerable number of alkaloids in widely separated plant families. It protonates to form salts upon treatment with strong acids, such as HCl. It forms adducts with Lewis acids, such as BF3.COA of Formula: C15H13N

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Fluorescence photoswitching of a diarylethene-perylenebisimide dyad based on intramolecular electron transfer was written by Fukaminato, Tuyoshi;Tanaka, Masaaki;Doi, Takao;Tamaoki, Nobuyuki;Katayama, Tetsuro;Mallick, Arabinda;Ishibashi, Yukihide;Miyasaka, Hiroshi;Irie, Masahiro. And the article was included in Photochemical & Photobiological Sciences in 2010.Reference of 110590-84-6 This article mentions the following:

A fluorescent photochromic mol., which is composed of a photochromic diarylethene (DE) and a fluorescent perylenebisimide (PBI), was synthesized and its fluorescence photoswitching was studied. The fluorescence quantum yield of the open-ring isomer is constant irresp. of solvent polarity, while that of the closed-ring isomer decreases with an increase in the dielec. constant of solvents. Femtosecond time-resolved transient and fluorescence lifetime measurements revealed that the fluorescence quenching of the closed-ring isomer is attributed to the intramol. electron transfer from the PBI chromophore to the DE unit. In the experiment, the researchers used many compounds, for example, 2,9-Di(tridecan-7-yl)anthra[2,1,9-def:6,5,10-d’e’f’]diisoquinoline-1,3,8,10(2H,9H)-tetraone (cas: 110590-84-6Reference of 110590-84-6).

2,9-Di(tridecan-7-yl)anthra[2,1,9-def:6,5,10-d’e’f’]diisoquinoline-1,3,8,10(2H,9H)-tetraone (cas: 110590-84-6) belongs to isoquinoline derivatives. Quinoline is a mancude organic heterobicyclic parent, an azaarene, an ortho-fused heteroarene and a member of isoquinolines. It protonates to form salts upon treatment with strong acids, such as HCl. It forms adducts with Lewis acids, such as BF3.Reference of 110590-84-6

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Utilization of a Hydrogen Source from Renewable Lignocellulosic Biomass for Hydrogenation of Nitroarenes was written by Tan, Fang-Fang;Tang, Kai-Li;Zhang, Ping;Guo, Yan-Jun;Qu, Mengnan;Li, Yang. And the article was included in ChemCatChem in 2019.Recommanded Product: 607-32-9 This article mentions the following:

Herein, the utilization of a hydrogen source from renewable lignocellulosic biomass, one of the most abundant renewable sources in nature, for a hydrogenation of nitroarenes was described. The hydrogenation was demonstrated by reduction of nitroarenes to arylamines e.g., I in up to 95% yields. Mechanism studies suggested that the hydrogenation occurred via a hydrogen transformation pathway. In the experiment, the researchers used many compounds, for example, 5-Nitroisoquinoline (cas: 607-32-9Recommanded Product: 607-32-9).

5-Nitroisoquinoline (cas: 607-32-9) belongs to isoquinoline derivatives. Quinoline and isoquinoline skeletons are among the most attractive frameworks with a wide range of biological and pharmacological activities. The discovery of chloroquine, the most well-known drug containing this stent, has helped bring about decades of malaria control and treatment.Recommanded Product: 607-32-9

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Solid supported Pd(0): an efficient recyclable heterogeneous catalyst for chemoselective reduction of nitroarenes was written by Shil, Arun K.;Sharma, Dharminder;Guha, Nitul Ranjan;Das, Pralay. And the article was included in Tetrahedron Letters in 2012.Safety of 5-Nitroisoquinoline This article mentions the following:

Solid supported palladium(0) (SS-Pd) catalyzed highly chemoselective reduction of nitroarenes to the corresponding anilines was accomplished under a milder reaction condition. This catalyst showed high compatibility with various reducing agents (NaBH₄, Et₃SiH, and NH₂NH₂·H₂O) and a large number of reducible functional groups such as sulfonamide, amides, carboxylic acid, ester, alc., halide, hetero cycle, nitrile, alkene, carbonyl, O-benzyl, and N-benzyl were tolerated. Most of the reactions were clean and high yielding. The SS-Pd catalyst could be recycled up to seven runs without significant loss of activity. In the experiment, the researchers used many compounds, for example, 5-Nitroisoquinoline (cas: 607-32-9Safety of 5-Nitroisoquinoline).

5-Nitroisoquinoline (cas: 607-32-9) belongs to isoquinoline derivatives. Although isoquinoline derivatives can be synthesized by several methods, relatively few direct methods deliver the unsubstituted isoquinoline. The discovery of chloroquine, the most well-known drug containing this stent, has helped bring about decades of malaria control and treatment.Safety of 5-Nitroisoquinoline

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chromophores as elements of structure for pico technology optical computers was written by Langhals, Heinz;Saulich, Sigrid. And the article was included in Zeitschrift fuer Naturforschung, B: Chemical Sciences in 2003.Synthetic Route of C50H62N2O4 This article mentions the following:

The transfer of the energy of optical excitation between the different chromophores of anthraquinone and perylene dyes has been controlled by their relative orientation. Such assemblies are basic components for optical computers on the picometer scale. In the experiment, the researchers used many compounds, for example, 2,9-Di(tridecan-7-yl)anthra[2,1,9-def:6,5,10-d’e’f’]diisoquinoline-1,3,8,10(2H,9H)-tetraone (cas: 110590-84-6Synthetic Route of C50H62N2O4).

2,9-Di(tridecan-7-yl)anthra[2,1,9-def:6,5,10-d’e’f’]diisoquinoline-1,3,8,10(2H,9H)-tetraone (cas: 110590-84-6) belongs to isoquinoline derivatives. Quinoline and its derivatives are widely used as fungicides, biological agents, antibiotics, alkaloids, dyes, rubber chemicals and flavoring agents. The Pomeranz–Fritsch reaction provides a method for the preparation of isoquinoline. This reaction uses a benzaldehyde and aminoacetoaldehyde diethyl acetal, which in an acid medium react to form isoquinoline.Synthetic Route of C50H62N2O4

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Single molecule fluorescence autocorrelation measurement on anisotropic molecular diffusion in nematic liquid crystal was written by Kawai, Tsuyoshi;Kubota, Akihiro;Kawamura, Kensuke;Tsumatori, Hiroyuki;Nakashima, Takuya. And the article was included in Thin Solid Films in 2008.Product Details of 110590-84-6 This article mentions the following:

Diffusion kinetics of three dyes in nematic liquid crystals were studied with single-mol. fluorescence autocorrelation spectroscopy. Markedly large anisotropy was observed in the diffusion coefficient and structure of diffusion mols. showed no marked effect on the anisotropy. In the experiment, the researchers used many compounds, for example, 2,9-Di(tridecan-7-yl)anthra[2,1,9-def:6,5,10-d’e’f’]diisoquinoline-1,3,8,10(2H,9H)-tetraone (cas: 110590-84-6Product Details of 110590-84-6).

2,9-Di(tridecan-7-yl)anthra[2,1,9-def:6,5,10-d’e’f’]diisoquinoline-1,3,8,10(2H,9H)-tetraone (cas: 110590-84-6) belongs to isoquinoline derivatives. Being an analog of pyridine, isoquinoline is a weak base, with a pKa of 5.14. The Pomeranz–Fritsch reaction provides a method for the preparation of isoquinoline. This reaction uses a benzaldehyde and aminoacetoaldehyde diethyl acetal, which in an acid medium react to form isoquinoline.Product Details of 110590-84-6

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Synthesis of 1-benzyl-1,2,3,4-tetrahydroisoquinoline, Part I: Grignard synthesis of 1-(substituted benzyl)-1,2,3,4-tetrahydroisoquinoline models with potential antibacterial activity was written by Al-Hiari, Yusuf M.;Sweileh, Bassam A.;Shakya, Ashok K.;Abu Sheikha, Ghassan;Almuhtaseb, Sabah I.. And the article was included in Jordan Journal of Pharmaceutical Sciences in 2009.Category: isoquinoline This article mentions the following:

(Benzyl)tetrahydroisoquinoline alkaloids have interesting biol. activity. 1-(Substituted benzyl)-1,2,3,4-tetrahydroisoquinolines, e.g., I, were prepared via Grignard addition to 3,4-dihydroisoquinolines in good yields. But this procedure is failed for the case of benzyloxybenzyl- and 4-hydroxybenzyl Grignards due to side reactions and low chem. yields. Therefore an alternative strategy based on lithiation of N-benzoyl-1,2,3,4-tetrahydroisoquinoline followed by alkylation was applied and the desired products were obtained in reasonable yields. All products and intermediates were isolated, purified and their structure confirmed using NMR, IR and MS techniques. The antibacterial activity against tetracycline resistant MRSA revealed that some compounds were identified as being of potential interest. In particular, some of the prepared products showed interesting antibacterial activity with MIC ranges of 10 to 64 μg/mL. In the experiment, the researchers used many compounds, for example, 6,7-Dimethoxy-3,4-dihydroisoquinoline (cas: 3382-18-1Category: isoquinoline).

6,7-Dimethoxy-3,4-dihydroisoquinoline (cas: 3382-18-1) belongs to isoquinoline derivatives. Isoquinoline is a structural isomer of quinoline, which have antiseptic, antipyretic and anti-cyclic properties, and can be used as antimalarial drugs and for the preparation of other antimalarial medicine. It protonates to form salts upon treatment with strong acids, such as HCl. It forms adducts with Lewis acids, such as BF3.Category: isoquinoline

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Cu₂O/1-(2-methylhydrazine-1-carbonyl)-isoquinoline 2-oxide catalyzed C-N cross-coupling reaction in aqueous media was written by Xie, Jian-Wei;Yao, Zhen-Bin;Wang, Xiao-Chuang;Zhang, Jie. And the article was included in Tetrahedron in 2019.Formula: C10H7NO2 This article mentions the following:

An exptl. simple, efficient, and inexpensive catalyst system was developed for the N-arylation of imidazole, indole, pyrrole, alkyl alc. amines, and alkyl amines RNH₂ (R = Bu, hexyl, octyl, benzyl, 4-hydroxyphenyl, 2-hydroxyethyl, 2-hydroxypropyl, 2-hydroxybutyl) with aryl iodides and bromides R¹X (R¹ = 3-methoxyphenyl, pyridin-2-yl, 1,3-benzodioxol-5-yl, etc.; X = Br, I). The reaction proceeds in water-ethanol media at 120°C for 12 h with Cu₂O as the catalyst, 1-(2-methylhydrazine-1-carbonyl)-isoquinoline 2-oxide as the ligand, and NaOH as the base to generate a wide range of N-arylated products R¹R² (R² = imidazol-1-yl, 1H-indol-1-yl, pyrrol-1-yl, hydroxyethylaminyl, butylaminyl, etc.) in moderate to excellent yields. Aqueous medium, ease of operation, and broad substrate scope give the process a benign environmental profile. In the experiment, the researchers used many compounds, for example, Isoquinoline-1-carboxylic acid (cas: 486-73-7Formula: C10H7NO2).

Isoquinoline-1-carboxylic acid (cas: 486-73-7) belongs to isoquinoline derivatives. The isoquinoline structure occurs in a considerable number of alkaloids in widely separated plant families. The discovery of chloroquine, the most well-known drug containing this stent, has helped bring about decades of malaria control and treatment.Formula: C10H7NO2

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Reactions of 6,7-dimethoxy-3,4-dihydroisoquinoline with o-quinone methides was written by Osyanin, V. A.;Ivleva, E. A.;Osipov, D. V.;Klimochkin, Yu. N.. And the article was included in Chemistry of Heterocyclic Compounds (New York, NY, United States) in 2011.Quality Control of 6,7-Dimethoxy-3,4-dihydroisoquinoline This article mentions the following:

Products of heterocyclization, 9,10-dimethoxy-12,13-dihydro-7aH,15H-naphtho[1′,2′:5,6][1,3]oxazino[2,3-a]isoquinolines, were isolated on condensation of 6,7-dimethoxy-3,4-dihydroisoquinoline with 1-[(dimethylamino)methyl]-2-naphthols. In the case of 2-hydroxybenzyl alcs., products of an aza-Michael reaction, 2-[(6,7-dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)methyl]phenols were obtained. In the experiment, the researchers used many compounds, for example, 6,7-Dimethoxy-3,4-dihydroisoquinoline (cas: 3382-18-1Quality Control of 6,7-Dimethoxy-3,4-dihydroisoquinoline).

6,7-Dimethoxy-3,4-dihydroisoquinoline (cas: 3382-18-1) belongs to isoquinoline derivatives. Quinoline is a catabolite of tryptophan, the basic structure of some antihypertensive drugs, such as the peripheral vasodilators prazosin and doxazosin. Isoquinoline-type alkaloids show biological activities similar to those of morphinane-, protoberberine-, and benzophenanthridine-type alkaloids.Quality Control of 6,7-Dimethoxy-3,4-dihydroisoquinoline

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Asymmetric Allylboration of Cyclic Imines and Applications to Alkaloid Synthesis was written by Wu, T. Robert;Chong, J. Michael. And the article was included in Journal of the American Chemical Society in 2006.Synthetic Route of C11H13NO2 This article mentions the following:

Treatment of cyclic imines with 3,3′-disubstituted binaphthol modified allylboronates provides the expected allylated products in good yields and with high stereoselectivities (91-99% ee). The products may be readily transformed into several naturally occurring alkaloids. In the experiment, the researchers used many compounds, for example, 6,7-Dimethoxy-3,4-dihydroisoquinoline (cas: 3382-18-1Synthetic Route of C11H13NO2).

6,7-Dimethoxy-3,4-dihydroisoquinoline (cas: 3382-18-1) belongs to isoquinoline derivatives. Being an analog of pyridine, isoquinoline is a weak base, with a pKa of 5.14. Other industrial applications include their use as corrosion inhibitors, preservatives, and as solvents for resins and terpenes.Synthetic Route of C11H13NO2

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem