147.15| Heterocyclic Building Blocks-Isoquinoline

Dong, Jianyang et al. published their research in Green Chemistry in 2021 | CAS: 394-67-2

4-Fluoroisoquinoline (cas: 394-67-2) belongs to isoquinoline derivatives. Being an analog of pyridine, isoquinoline is a weak base, with a pKa of 5.14. It protonates to form salts upon treatment with strong acids, such as HCl. It forms adducts with Lewis acids, such as BF3.Computed Properties of C9H6FN

Visible-light-mediated three-component Minisci reaction for heteroarylethyl alcohols synthesis was written by Dong, Jianyang;Yue, Fuyang;Liu, Jianhua;Song, Hongjian;Liu, Yuxiu;Wang, Qingmin. And the article was included in Green Chemistry in 2021.Computed Properties of C9H6FN This article mentions the following:

Herein, a mild, modular, practical Minisci reaction for catalytic synthesis of heteroarylethyl alcs. such as ArCH(R¹)CHR²OH [Ar = quinol-2-yl, isoquinolin-1-yl, 2-benzothiazolyl, etc.; R¹R² = CH₂(CH₂)₂CH₂, CH₂CH₂CH₂; R¹ = On-Bu, Me; R² = H, Me] via sequential addition of H₂O and N-heteroarenes across olefinic double bonds was reported. This scalable protocol was used for direct hydroxy-heteroarylation of olefins with a wide range of N-heteroarenes and could be expected to permit rapid conversion of abundant feedstock materials into medically relevant mols. In the experiment, the researchers used many compounds, for example, 4-Fluoroisoquinoline (cas: 394-67-2Computed Properties of C9H6FN).

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Roe, Arthur et al. published their research in Journal of the American Chemical Society in 1951 | CAS: 394-67-2

4-Fluoroisoquinoline (cas: 394-67-2) belongs to isoquinoline derivatives. The isoquinoline structure occurs in a considerable number of alkaloids in widely separated plant families. Isoquinoline-type alkaloids show biological activities similar to those of morphinane-, protoberberine-, and benzophenanthridine-type alkaloids.Application of 394-67-2

Preparation of heterocyclic fluorine compounds by the Schiemann reaction. III. Some monofluoroisoquinolines was written by Roe, Arthur;Teague, Claude E. Jr.. And the article was included in Journal of the American Chemical Society in 1951.Application of 394-67-2 This article mentions the following:

1-Aminoisoquinoline (15 g.) in 120 ml. 42% HBF₄, cooled to -5掳, the precipitate suspended in 150 ml. petr. ether (b. 30-40掳), treated (1 hr.) at room temperature with 7.2 g. powd. NaNO₂ and then 30 min. with EtONO, and kept 2 hrs., gives 36 g. 1-isoquinolinediazonium fluoborate (I), decompose 68掳; decomposition of I gives 13% (overall) yield of 1-fluoroisoquinoline (II), b. 208掳, n³⁰_D 1.5861. The following were prepared with variations of the above method: 3-isomer of I, m. 15-25掳; of II, b. 251掳, n³⁰_D 1.5875, 49%; 4-isomer of I, m. 20-5掳; of II, b. 236掳, n³⁰_D 1.5914, 36%; 5-isomer of I, m. 190掳; of II, b₆₂ 145掳, m. 43掳, 67%. Of the 4 isomeric I, only the 1- and 5-isomers are stable; the 3- and 4-isomers decompose at room temperature The hydroxyisoquinolines, expected by-products in the Schiemann reaction, were isolated in every case from the reaction mixtures p-FC₆H₄CH:CHCH(OEt)₂ and H₂SO₄ do not yield 6-fluoroisoquinoline. In the experiment, the researchers used many compounds, for example, 4-Fluoroisoquinoline (cas: 394-67-2Application of 394-67-2).

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Roe, Arthur et al. published their research in Journal of the American Chemical Society in 1951 | CAS: 394-67-2

1-Aminoisoquinoline (15 g.) in 120 ml. 42% HBF₄, cooled to -5°, the precipitate suspended in 150 ml. petr. ether (b. 30-40°), treated (1 hr.) at room temperature with 7.2 g. powd. NaNO₂ and then 30 min. with EtONO, and kept 2 hrs., gives 36 g. 1-isoquinolinediazonium fluoborate (I), decompose 68°; decomposition of I gives 13% (overall) yield of 1-fluoroisoquinoline (II), b. 208°, n³⁰_D 1.5861. The following were prepared with variations of the above method: 3-isomer of I, m. 15-25°; of II, b. 251°, n³⁰_D 1.5875, 49%; 4-isomer of I, m. 20-5°; of II, b. 236°, n³⁰_D 1.5914, 36%; 5-isomer of I, m. 190°; of II, b₆₂ 145°, m. 43°, 67%. Of the 4 isomeric I, only the 1- and 5-isomers are stable; the 3- and 4-isomers decompose at room temperature The hydroxyisoquinolines, expected by-products in the Schiemann reaction, were isolated in every case from the reaction mixtures p-FC₆H₄CH:CHCH(OEt)₂ and H₂SO₄ do not yield 6-fluoroisoquinoline. In the experiment, the researchers used many compounds, for example, 4-Fluoroisoquinoline (cas: 394-67-2Application of 394-67-2).

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Park, Nathaniel H. et al. published their research in Angewandte Chemie, International Edition in 2016 | CAS: 394-67-2

4-Fluoroisoquinoline (cas: 394-67-2) belongs to isoquinoline derivatives. Quinoline and its derivatives are widely used as fungicides, biological agents, antibiotics, alkaloids, dyes, rubber chemicals and flavoring agents. They are also used to make oil-soluble dyes, food colorants, pharmaceuticals, pH indicators and other organic compounds. Synthetic Route of C9H6FN

Rapid Synthesis of Aryl Fluorides in Continuous Flow through the Balz-Schiemann Reaction was written by Park, Nathaniel H.;Senter, Timothy J.;Buchwald, Stephen L.. And the article was included in Angewandte Chemie, International Edition in 2016.Synthetic Route of C9H6FN This article mentions the following:

The Balz-Schiemann reaction remains a highly used means for preparing aryl fluorides from anilines. However, the limitations associated with handling aryl diazonium salts often hinder both the substrate scope and scalability of this reaction. To address this, a new continuous flow protocol was developed that eliminates the need to isolate the aryl diazonium salts. The new process has enabled the fluorination of an array of aryl and heteroaryl amines. In the experiment, the researchers used many compounds, for example, 4-Fluoroisoquinoline (cas: 394-67-2Synthetic Route of C9H6FN).

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Sugasawa, Shigehiko et al. published their research in Yakugaku Zasshi in 1942 | CAS: 394-67-2

4-Fluoroisoquinoline (cas: 394-67-2) belongs to isoquinoline derivatives. The isoquinoline structure occurs in a considerable number of alkaloids in widely separated plant families. Most traditional methods of generating isoquinoline do so via oxidative aromatization of dihydro- or tetrahydro-isoquinolines, usually offering some environmental or economic advantage.HPLC of Formula: 394-67-2

Syntheses of nitrogen-containing heterocyclic compounds. XXVII. Isoquinoline, cyclization by the Bischler-Napieralski method was written by Sugasawa, Shigehiko;Shigehara, Hajime. And the article was included in Yakugaku Zasshi in 1942.HPLC of Formula: 394-67-2 This article mentions the following:

3,4-(MeO)₂C₆H₃(CH₂)₂NH₂, 3,4-(MeO)₂C₆H₃(CH₂)₃NH₂, and 3,4-(MeO)₂C₆H₃CH(OH)(CH₂)₂NH₂ are acylated with BzOH, veratric acid, 2,3,4-(MeO)₃C₆H₂CO₂H, etc., and the amides are heated in toluene with POCl₃ to effect ring closure to 1-substituted 3,4-dihydroisoquinolines. These are converted to methine bases by the Hofmann decomposition The neutral substances are obtained by the Emde decomposition and oxidized to benzophenonecarboxylic acid derivatives which are the same as products formed by the Friedel-Crafts condensation of m-hemipic anhydride and C₆H₆, veratrole, or pyrogallol tri-Me ether. This indicates that the isoquinoline ring closure always occurs at the para-position with reference to a MeO group at the 3-position of the acid amide and not at the ortho-position as stated by Pfeiffer, et al. (C.A. 34, 2383.3). In the experiment, the researchers used many compounds, for example, 4-Fluoroisoquinoline (cas: 394-67-2HPLC of Formula: 394-67-2).

4-Fluoroisoquinoline (cas: 394-67-2) belongs to isoquinoline derivatives. The isoquinoline structure occurs in a considerable number of alkaloids in widely separated plant families. Most traditional methods of generating isoquinoline do so via oxidative aromatization of dihydro- or tetrahydro-isoquinolines, usually offering some environmental or economic advantage.HPLC of Formula: 394-67-2

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wengryniuk, Sarah E. et al. published their research in Organic Letters in 2013 | CAS: 394-67-2

4-Fluoroisoquinoline (cas: 394-67-2) 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. 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 394-67-2

Regioselective Bromination of Fused Heterocyclic N-Oxides was written by Wengryniuk, Sarah E.;Weickgenannt, Andreas;Reiher, Christopher;Strotman, Neil A.;Chen, Ke;Eastgate, Martin D.;Baran, Phil S.. And the article was included in Organic Letters in 2013.Product Details of 394-67-2 This article mentions the following:

A mild method for the regioselective C2-bromination of fused azine N-oxides is presented, employing tosic anhydride as the activator and tetra-n-butylammonium bromide as the nucleophilic bromide source. The C2-brominated compounds, e.g. I [X = H, 4-OMe, 6-OMe, etc.], are produced in moderate to excellent yields and with excellent regioselectivity in most cases. The potential extension of this method to other halogens, effecting C2-chlorination with Ts₂O/TBACl is also presented. Finally, this method could be incorporated into a viable one-pot oxidation/bromination process, using methyltrioxorhenium/urea hydropgen peroxide as the oxidant. In the experiment, the researchers used many compounds, for example, 4-Fluoroisoquinoline (cas: 394-67-2Product Details of 394-67-2).

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem