Heterocyclic Building Blocks-Isoquinoline

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.63927-23-1,5-Bromo-8-nitroisoquinoline,as a common compound, the synthetic route is as follows.

63927-23-1, EXAMPLE 26 5-Bromo-2-ethyl-1,2,3,4-tetrahydro-8-nitroisoquinoline A solution of 5-bromo-8-nitroisoquinoline (1 g, 3.95 mmol) in 20 mL THF was cooled to 0 C. and treated sequentially with sodium borohydride (0.75 g, 19.83 mmol) followed by the slow addition of acetic acid (20 mL). The reaction mixture was allowed to warm to room temperature, and an additional 2 equiv. of sodium borohydride was added. After quenching with water and treatment with sodium hydroxide solution to make basic, the reaction mixture was extracted with ethyl acetate. The organic residue was chromatographed on silica gel (25% ethyl acetate in hexane) to give the N-ethyl-5-bromo-8-nitrotetrahydroisoquinoline (0.8 g, 70% yield).

As the paragraph descriping shows that 63927-23-1 is playing an increasingly important role.

Reference£º
Patent; BIGGE, CHRISTOPHER F.; MALONE, THOMAS C.; WATJEN, FRANK; US2003/114422; (2003); A1;,
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Isoquinoline | C9H7N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.23687-25-4,Isoquinolin-4-amine,as a common compound, the synthetic route is as follows.,23687-25-4

To a stirring solution of 4-aminoisoquinoline (1.4 g, 10.0 mmol) in 5 N aqueous hydrochloric acid (12 mE) at 00 C. was added a solution of sodium nitrite (NaNO2, 0.069 g, 10.0 mmol) in deionized water (1 mE), while maintaining the internal temperature below 00 C. The reaction mixture was stirred at 00 C. for 30 mm and a solution of tin(II) chloride dihydrate (SnC12.2H20, 5.6 g, 25.0 mmol) dissolved in concentrated hydrochloric acid (5 mE) was added dropwise. The mixture was stirred at room temperature for 2 h and the solution was adjusted to pH -12-14 with 20% aqueous sodium hydroxide. The mixture was extracted with 2:1 CHC13/iPrOH. The organic layer was dried (Na2SO4), filtered, and concentrated in vacuo. The resulting crude product was purified by flash chromatography (Si02, 50% ethyl acetate in hexanes) to give the desired compound (0.84 g, 5.3 mmol, 53%)

As the paragraph descriping shows that 23687-25-4 is playing an increasingly important role.

Reference£º
Patent; ChemoCentryx, Inc.; Cappel, Markus; (83 pag.)US2018/9797; (2018); A1;,
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18881-17-9, (S)-(1,2,3,4-Tetrahydroisoquinolin-3-yl)methanol is a isoquinoline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

18881-17-9, This compound is obtained using a protocol from the literature (R. B. Kawthekar et al. South Africa Journal of Chemistry 63, 195, 2009) starting from 15 g of (3S)-1,2,3,4-tetrahydroisoquinolin-3-ylmethanol (91.9 mmol) in the presence of benzyl chloroformate and triethylamine in solution in dichloromethane. After purification over silica gel (petroleum ether/AcOEt gradient), the title compound is obtained in the form of an oil. (0132) 1H NMR: delta (300 MHz; DMSO-d6; 300K): 7.33 (m, 5H, aromatic Hs, O-benzyl); 7.15 (s, 4H, aromatic Hs, H tetrahydroisoquinoline); 5.13 (s, 2H, CH2-Ph); 4.73 (d, 1H, H tetrahydroisoquinoline); 4.47 (m, H, CH2OH); 4.36 (m, 1H, H tetrahydroisoquinoline); 4.28 (d, 1H, H tetrahydroisoquinoline); 3.39 (dd, 1H, CH2OH); 3.23 (dd, 1H, CH2OH); 2.93 (dd, 1H, H tetrahydroisoquinoline); 2.86 (dd, 1H, H tetrahydroisoquinoline) (0133) IR: nu: OH: 3416 cm-1; nu: C-H: 754 cm-1

The synthetic route of 18881-17-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Les Laboratoires Servier; Vernails (R&D) Limited; CASARA, Patrick; LE DIGUARHER, Thierry; HENLIN, Jean-Michel; STARCK, Jeroeme-Benoit; LE TIRAN, Arnaud; DE NANTEUIL, Guillaume; GENESTE, Olivier; DAVIDSON, James Edward Paul; MURRAY, James Brooke; CHEN, I-Jen; WALMSLEY, Claire; GRAHAM, Christopher John; RAY, Stuart; MADDOX, Daniel; BEDFORD, Simon; (72 pag.)US2016/152599; (2016); A1;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.34846-65-6,Isoquinoline-4-carbonitrile,as a common compound, the synthetic route is as follows.

To a stirred solution of isoquinolin-4-carbonitrile (Intermediate-13) (3.0 g, 19.45 mmol) in EtOH (30 mL) was added KOH (20 g in 20 mL water) and the mixture was refluxed overnight. It was then cooled to RT and concentrated under reduced pressure. The aqueous layer was washed with Et2O and neutralized using 1N HCl. It was extracted with EtOAc and the organic layer was dried over Na2SO4, filtered, and concentrated to give the title compound (2 g, 59.3percent) as an off white solid., 34846-65-6

As the paragraph descriping shows that 34846-65-6 is playing an increasingly important role.

Reference£º
Patent; LUPIN LIMITED; KULKARNI, Sanjeev Anant; MADAN, Sachin; JANA, Nirmal Kumar; TALE, Prashant Vitthalrao; CHEEMALA, Narasimha Murthy; MAHANGARE, Sachin Jaysing; VIDHATE, Prashant Popatrao; KULKARNI, Chaitanya Prabhakar; PATEL, Sapana Suresh; PATIL, Amolsing Dattu; ZADE, Seema Prabhakar; SHINDE, Rohan Mahadev; PALLE, Venkata P.; KAMBOJ, Rajender Kumar; US2013/178457; (2013); A1;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1196-38-9,3,4-Dihydroisoquinolin-1(2H)-one,as a common compound, the synthetic route is as follows.

Potassium nitrate (3.71 g, 36.7 mmol) was added to concentrated sulfuric acid (27 mL).3,4-Dihydroisoquinoline-1(2H)-one (4.50 g, 30.6 mmol) was added at 0 C for 2 hours.The reaction solution was poured into ice water, suction filtered, and the obtained solid was washed with water and dried.The title compound (4.00 g, yield 68.0%) was obtained.

1196-38-9, The synthetic route of 1196-38-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Shandong Xuanzhu Pharmaceutical Technology Co., Ltd.; Wang Tingzhong; Chen Bo; Zhu Peng; Liu Bin; (66 pag.)CN110294742; (2019); A;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.6624-49-3,Isoquinoline-3-carboxylic acid,as a common compound, the synthetic route is as follows.,6624-49-3

General procedure: At 0 ¡ãC and with stirring to the solution of 865 mg (5.0 mmol) of isoquinoline-3-carboxylic acid in 10 ml of anhydrous THF 675 mg (5.0 mmol) of HOBt was added to form reaction mixture A. The solution of 5.5 mmol of l-amino acid benzylester in 5 ml of anhydrous THF was adjusted pH 9 with triethylamine and stirred for 30 min to form mixture B. At 0 ¡ãC the mixtures A and B were mixed and then 1339 mg (6.5 mmol) of DCC was added. The reaction mixture was stirred at 0 ¡ãC for 2 h, at room temperature for12 h and TLC (ethyl acetate/petroleum ether, 1:2) indicated the complete disappearance of isoquinoline-3-carboxylic acid. The formed precipitates of DCU were removed by filtration and the filtrate was evaporated under vacumm. The residue was dissolved in 50 ml of ethyl acetate and the formed solution was washed successively with saturated aqueous solution of NaHCO3 (30 ml .x. 3), 5percent aqueous solution of KHSO4 (30 ml .x. 3) and saturated aqueous solution of NaCl (30 ml .x. 3) and dried over anhydrous Na2SO4. After filtration the filtrate was evaporated under vacumm and the residure was purified on silica gel chromatography (CHCl3:MeOH, 20:1) to give the title compounds.

As the paragraph descriping shows that 6624-49-3 is playing an increasingly important role.

Reference£º
Article; Zheng, Meiqing; Yang, Yifan; Zhao, Ming; Zhang, Xiaoyi; Wu, Jianhui; Chen, Gong; Peng, Li; Wang, Yuji; Peng, Shiqi; European Journal of Medicinal Chemistry; vol. 46; 5; (2011); p. 1672 – 1681;,
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891782-60-8,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.891782-60-8,7-Bromo-3,4-dihydro-2H-isoquinolin-1-one,as a common compound, the synthetic route is as follows.

To a solution of 7-bromo-3,4-dihydroisoquinolin-1(2H)-one (150 mg, 0.66 mmol) and 1 -(bromomethyl)-4-fluorobenzene (151 mg, 0.80 mmol) in 1 ,4-dioxane (5 ml) was added potassium t-butoxide (112 mg, 1.00 mmol). The resulting mixture was stirred at RT overnight. Solids were removed by filtration. Then the mixture was concentrated in vacuo to give 7-bromo-2-(4-fluorobenzyl)-3,4-dihydroisoquinolin-1(2H)-one (222 mg, yield: 100%). MS (M+H): 335.

As the paragraph descriping shows that 891782-60-8 is playing an increasingly important role.

Reference£º
Patent; MERCK SHARP & DOHME CORP.; DAI, Xing; LIU, Hong; PALANI, Anandan; HE, Shuwen; NARGUND, Ravi; XIAO, Dong; ZORN, Nicolas; DANG, Qun; MCCOMAS, Casey C.; PENG, Xuanjia; LI, Peng; SOLL, Richard; WO2014/205593; (2014); A1;,
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Isoquinoline | C9H7N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.925672-85-1,1,6-Dibromoisoquinolin-3-amine,as a common compound, the synthetic route is as follows.,925672-85-1

Preparation of intermediate 6-bromoisoquinolin-1-d-3-amine (XI) is depicted below in Scheme 4. RRN 12Step 1 (0813) To a mixture of 13 1,6-dibromoisoquinolin-3-amine (X) (0.5 g, 1.66 mmol), 14 ammonium formate-d5 (0.56 g, 8.28 mmol) and 15 Pd(PPh3)4 (191.3 mg, 0.170 mmol) in 16 DMF (5 mL) was heated to 50 C. for 48 h. The solvents were concentrated and the residue was suspended in 17 chloroform. The solid was collected by filtration and washed with water and EtOAc. The solid were dried under high vacuo to obtain 18 6-bromo-1-deuterio-isoquinolin-3-amine (XI) (115 mg, 0.513 mmol, 31.0% yield) as a pale yellow solid. 1H NMR (500 MHz, DMSO-d6) delta ppm 6.11 (2H, s), 6.55 (1H, s), 7.22 (1H, dd, J=8.78, 1.92 Hz), 7.73 (1H, d, J=8.51 Hz), 7.79 (1H, d, J=1.92 Hz); ESIMS found for C9H6DBrN2 m/z 224.0 (79BrM+H).

925672-85-1 1,6-Dibromoisoquinolin-3-amine 16049917, aisoquinoline compound, is more and more widely used in various fields.

Reference£º
Patent; Samumed, LLC; KC, Sunil Kumar; Mittapalli, Gopi Kumar; Hofilena, Brian Joseph; Marakovits, Joseph Timothy; Chiruta, Chandramouli; Mak, Chi Ching; Cao, Jianguo; (324 pag.)US2017/313681; (2017); A1;,
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20232-39-7, 6,7-Dimethoxy-3,4-dihydroisoquinoline hydrochloride is a isoquinoline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: In a 10 mL pressurized reaction vial, 0.5 mmolindole (1) or indole-2-carboxylic acid (6), 0.5mmol cyclic imine (2, 4, 9or 12) and Et3N (for theamount used see Table 1) were placed. Thereaction mixture was heated in an oil bath or in a CEM Discover SP MW reactor.The reaction conditions are listed in Tables 1 and 2 and the work-up procedurein the text

20232-39-7, 20232-39-7 6,7-Dimethoxy-3,4-dihydroisoquinoline hydrochloride 2724664, aisoquinoline compound, is more and more widely used in various fields.

Reference£º
Article; Szatma?ri, Istva?n; Sas, Judit; Fu?lo?p, Ferenc; Tetrahedron Letters; vol. 54; 37; (2013); p. 5069 – 5071;,
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69454-42-8, Methyl 1-oxo-1,2-dihydroisoquinoline-3-carboxylate is a isoquinoline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,69454-42-8

Step B: A mixture of methyl l-oxo-l,2-dihydroisoquinoline-3-carboxylate (2.03 g, 10 mmol) and IN HCl/EtOH (20 mL) was stirred at 100 C for 3 h. The mixture was cooled to rt, concentrated under reduced pressure, and adjusted to pH 7 with aq sodium hydrogen carbonate. The mixture was then extracted with EtOAc and the combined organic layers were dried over Na2S04j filtered, and concentrated under reduced pressure to afford ethyl l-oxo-l,2-dihydroisoquinoline-3-carboxylate as a tan solid (1.8 g, 83%). 1H NMR (400 MHz, DMSO-d6) delta 11.19 (s, 1H), 8.26 (d, J= 8.0Hz, 1H), 7.92 (d, J= 8.0 Hz, 1H), 7.79-7.73 (m, 1H), 7.66-7.68 (m, 1H), 7.44 (s, 1H), 4.36 (q, J= 7.2 Hz, 2H), 1.36 (t, J= 7.2 Hz, 3H); LC-MS (ESI) m/z 218 (M+H)+

The synthetic route of 69454-42-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; AMBIT BIOSCIENCES CORPORATION; FARAONI, Raffaella; HADD, Michael, J.; HOLLADAY, Mark, W.; ROWBOTTOM, Martin; SETTI, Eduardo; WO2012/30944; (2012); A2;,
Isoquinoline – Wikipedia
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