Structure of 3-Aminoisoquinoline
CAS No.: 25475-67-6
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CAS No. : | 25475-67-6 |
Formula : | C9H8N2 |
M.W : | 144.17 |
SMILES Code : | C1=C(N)N=CC2=CC=CC=C12 |
MDL No. : | MFCD00102190 |
InChI Key : | VYCKDIRCVDCQAE-UHFFFAOYSA-N |
Pubchem ID : | 311869 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 11 |
Num. arom. heavy atoms | 10 |
Fraction Csp3 | 0.0 |
Num. rotatable bonds | 0 |
Num. H-bond acceptors | 1.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 46.15 |
TPSA ? Topological Polar Surface Area: Calculated from |
38.91 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.47 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
1.75 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
1.82 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
1.32 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
1.77 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
1.63 |
Log S (ESOL):? ESOL: Topological method implemented from |
-2.51 |
Solubility | 0.446 mg/ml ; 0.0031 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-2.18 |
Solubility | 0.943 mg/ml ; 0.00654 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-3.32 |
Solubility | 0.0693 mg/ml ; 0.000481 mol/l |
Class? Solubility class: Log S scale |
Soluble |
GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
High |
BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg |
Yes |
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
Yes |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
No |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-5.94 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
Ghose? Ghose filter: implemented from |
None |
Veber? Veber (GSK) filter: implemented from |
0.0 |
Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
Muegge? Muegge (Bayer) filter: implemented from |
1.0 |
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.55 |
PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
Brenk? Structural Alert: implemented from |
0.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<1.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.26 |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
at 60℃; for 16h; | EXAMPLE 181A N-3-isoquinolinylacetamide 3-Aminoisoquinoline (495 mg, 3.44 mmol) was stirred in Ac2O (9 mL) at 60° for 16 hours. The mixture was cooled to room temperature and concentrated in vacuo to provide the title compound which was used in the next step without further purification. | |
With triethylamine; In dichloromethane; at 20℃; for 3.5h; | Acetic anhydride (5.92 mL, 62.6 mmol) was added to a suspension of isoquinolin-3- amine (3.01 g, 20.9 mmol) and triethylamine (3.18 mL, 23.0 mmol) in CH2Cl2 (80 mL) at ambient temperature. The mixture was stirred 3.5 hours, then the volatiles were evaporated in vacuo. The residue was chased with toluene and concentrated in vacuo (3 x 25 mL) to provide the title compound (3.89 g) as a yellow solid. This material, which was found to also contain small quantities of acetic acid, was used without further purification. 1H NMR (300 MHz, DMSO-J6) delta 10.58 (s, IH), 9.13 (s, IH), 8.45 (s, IH), 8.04 (d, J= 7.8 Hz, IH), 7.88 (d, J= 8.2 Hz, IH), 7.69 (ddd, J= 8.2, 6.8, 1.2 Hz, IH), 7.52 (ddd, J= 7.9, 6.9, 1.0 Hz, IH), 2.13 (s, 3H). | |
With triethylamine; In dichloromethane; at 20℃; for 3.5h; | Acetic anhydride (5.92 mL, 62.6 mmol) was added to a suspension of isoquinolin-3- amine (3.01 g, 20.9 mmol) and triethylamine (3.18 mL, 23.0 mmol) in CH2Cl2 (80 mL) at ambient temperature. The mixture was stirred 3.5 hours, then the volatiles were evaporated in vacuo. The residue was chased with toluene and concentrated in vacuo (3 x 25 mL) to provide the title compound (3.89 g) as a yellow solid. This material, which was found to also contain small quantities of acetic acid, was used without further purification. 1H NMR (300 MHz, DMSO-J6) delta 10.58 (s, IH), 9.13 (s, IH), 8.45 (s, IH), 8.04 (d, J= 7.8 Hz, IH), 7.88 (d, J= 8.2 Hz, IH), 7.69 (ddd, J= 8.2, 6.8, 1.2 Hz, IH), 7.52 (ddd, J= 7.9, 6.9, 1.0 Hz, IH), 2.13 (s, 3H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
[0553] Compound 516A was prepared from 473A by an analogous method as that of 473B, except using <strong>[25475-67-6]3-aminoisoquinoline</strong> in place of 2-bromo-6-aminopyridine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
32% | With trimethylaluminum; In 1,2-dichloro-ethane; toluene; at 120℃; for 3h; | To a stirred solution of <strong>[25475-67-6]3-aminoisoquinoline</strong> (75 mg, 0.52 mmol) and 2-({2-[(morpholine-4-carbonyl)-amino]-pyridin-4-ylmethyl}-amino)-benzoic acid methyl ester (149 mg, 0.40 mmol) in DCE (6 mL) at 0°C, under argon, was added trimethylaluminium (2M in toluene, 0.4 mL, 0.8 mmol). The reaction was heated at 120 °C (bath temperature) for 3 hours. On cooling the reaction was diluted with aqueous sodium hydrogencarbonate solution and extracted with dichloromethane. The organic phase was washed with water, dried and concentrated in vacuo. The residue was purified by chromatography on Isolute.(R). flash NH2 (Separtis) (Eluant: EtOAc) to give morpholine-4-carboxylic acid (4-[2-(isoquinolin-3-ylcarbamoyl)-phenylamino]-methyl}-pyridin-2-yl)-amide (60 mg, 32percent) as a resin; 1H-NMR (300 MHz, d6-DMSO) 10.69 (1H, s), 9.21 (1H, s), 9.18 (1H, s), 8.60 (1H, s), 8.16-8.20 (2H, m), 8.10 (1H, d), 7.96 (1H, d), 7.90 (1H, d), 7.82 (1H, d), 7.75 (1H, t), 7.57 (1H, t), 7.28 (1H, t), 6.98 (1H, d), 6.63 (1H, t), 6.58 (1H, d), 4.48 (2H, d), 3.55-3.59 (4H, m), 3.41-3.45 (4H, m) m/z (ES+) 483 [M+H]+, 242. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
57% | With platinum(IV) oxide; hydrogen; trifluoroacetic acid; for 3h; | A mixture of <strong>[25475-67-6]isoquinolin-3-amine</strong> (239 mg, 1.66mmol), platinum(IV)oxide (28mg, 0.123 mmol), and TFA (6mL) was hydrogenated in the Parr apparatus for 3 hrs. Thereaction mixture was filtered with the aid ofethyl acetate. Thefiltrate was evaporated in vacuo and the residue was partitionedbetween 10percent aqueous sodium carbonate and ethylacetate. The layers were separated, the aqueous phase waswashed again with ethyl acetate, and the combined organiclayers were washed with brine and dried over magnesiumsulfate. The drying agent was filtered off and the solventevaporated. The material was purified by colunm chromatographyin ethyl acetate to give 139.8 mg (57percent) 5,6,7,8-tetrahydro<strong>[25475-67-6]isoquinolin-3-amine</strong> as a yellow-white solid. |
34% | With hydrogen; In ethyl acetate; trifluoroacetic acid; | EXAMPLE 64 STR66 3-Amino-5,6,7,8-tetrahydroisoquinoline Using the method of Example 63, Step A, 75 mg of <strong>[25475-67-6]3-aminoisoquinoline</strong> (7.73 mmoles) and 8.7 mg platinum oxide in 2 mL of trifluoroacetic acid was shaken under 40 psi of hydrogen for 3 h. The mixture was filtered and catalyst was washed with ethyl acetate. After concentrating the filtrate, the residue was dissolved in 10 mL of ethyl acetate and washed with 5 mL of saturated aquous sodium bicarbonate. The organic solution was dried (sodium sulfate), decanted, and concentrated to give a yellow syrup. Flash coumn chromatography on 19 g of silica gel, eluding with 600 mL of 50percent ethyl acetate/hexane gave 26.5 mg (34percent yield) of 3-amino-5,6,7,8-tetrahydroisoquinoline as a pale yellow solid. 1 H NMR (400 MHz, CDCl3): delta 7.78 (s, 1H), 6.22 (s, 1H), 4.12 (bs, 2H), 2.65-2.56 (m, 4H), 1.78-1.68 (m, 4H). Mass spectrum (FAB): m/e=149 (M+1) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
EXAMPLE 2(B) 3-(Piperazin-1-yl)-isoquinoline is prepared from <strong>[25475-67-6]3-aminoisoquinoline</strong> and bis-2-chloroethylamine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
EXAMPLE 3(B) 3-(4-(2-Hydroxyethyl)-piperazin-1-yl)-isoquinoline is prepared from <strong>[25475-67-6]3-aminoisoquinoline</strong> and bis-N,N-(2-chloroethyl)-2-hydroxyethylamine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
EXAMPLE 4(B) 3-(4-(2-Pyridyl)-piperazin-1-yl)-isoquinoline is prepared from <strong>[25475-67-6]3-aminoisoquinoline</strong> and bis-N,N-(2-chloroethyl)-2-pyridylamine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
EXAMPLE 10(B) 3-(4-(2-Pyrimidinyl)-piperazin-1-yl)-isoquinoline is prepared from <strong>[25475-67-6]3-aminoisoquinoline</strong> and bis-N,N-(2-chloroethyl)-2-pyrimidinylamine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
EXAMPLE 1(B) 3-(4-Methylpiperazin-1-yl)-isoquinoline is prepared from <strong>[25475-67-6]3-aminoisoquinoline</strong> and bis-N,N-(2-chloroethyl)-methylamine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
EXAMPLE 12(B) 3-(1,4-Diazacycloheptan-1-yl)-isoquinoline is prepared from <strong>[25475-67-6]3-aminoisoquinoline</strong> and 2-chloroethyl-3-chloropropylamine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
16% | With pyridine; In ISOPROPYLAMIDE; at 90℃; for 18h; | To a solution of <strong>[25475-67-6]3-aminoisoquinoline</strong> (210 mg, 1.5 mmol), EPO <DP n="223"/>pyridine (236 muL, 2.9 mmol) and 4-nitrophenyl chlorocarbonate (294 mg, 1.5 mmol) in N,N-dimethylacetamide (6 mL) was added 2-chloro-4- [ (5-methyl-5H-pyrrolo [3, 2-d] pyrimidin-4- yl) oxy]"aniline (200 mg, 0.73 mmol), and the mixture was stirred at 900C for 18 hr. The reaction mixture was diluted with water, and extracted with ethyl acetate (chil) . The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, and filtrated. The filtrate was concentrated under reduced pressure, and the residue was purified by column chromatography (NH silica gel, ethyl acetate) and recrystallized from ethyl acetate-hexane to give the title compound (53 mg, 16percent) as a colorless solid.1H-NMR (DMSO-de, 300 MHz) delta 4.11 (3H, s) , 6.61 (IH, d, J = 3.0 Hz), 7.30 - 8.40 (1OH, m) , 9.19 (IH, -s) , 10.08 (IH, s) . |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In tetrahydrofuran; N,N-dimethyl-formamide; at 65 - 70℃; for 1h; | General Procedure A: Preparation of isothiocyanate 1,1 '-thiocarbonylimidazole (1.1 mmol) was added to a solution of amine (1 mmol) inTHF/DMF (2 mL, 1:1) and the reaction mixture was stirred at 65-70 0C for 1 h. The product thus formed, was used for further transformation without isolation.; Example 1; Synthesis of 2-(Isoquinolin-3-ylamino)-lH-benzimidazole-5-carboxylic acid benzothiazol-6- ylamide3-Isothiocyanatoisoquinoline was prepared from <strong>[25475-67-6]3-aminoisoquinoline</strong> (5 mmol) as described in general procedure A.The isothiocyanate from above was reacted with methyl 3,4-diaminobenzoate (5mmol) followed by cyclization using EDC as described in general procedure B to obtain 2- (Isoquinolin-3-ylamino)-lH-benzimidazole-5-carboxylic acid methyl ester. The ester was hydrolyzed to yield the corresponding carboxylic acid employing general procedure C. Benzothiazol-6-ylamine (0.25 mmol) was coupled with aforementioned carboxylic acid using HBTU employing general procedure D to provide 2-(Isoquinolm-3-ylammo)-lH- benzimidazole-5-carboxylic acid benzothiazol-6-ylamide. MS: m/z 437 (M+H)+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In Ac2O; | EXAMPLE 181A N-3-isoquinolinylacetamide 3-Aminoisoquinoline (495 mg, 3.44 mmol) was stirred in Ac2O (9 mL) at 60° for 16 hours. The mixture was cooled to room temperature and concentrated in vacuo to provide the title compound which was used in the next step without further purification. | |
In Ac2O; | Example 181A N-3-isoquinolinylacetamide 3-Aminoisoquinoline (495 mg, 3.44 mmol) was stirred in Ac2O (9 mL) at 60° for 16 hours. The mixture was cooled to room temperature and concentrated in vacuo to provide the title compound which was used in the next step without further purification. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75% | With N-Bromosuccinimide; In ethanol; dichloromethane; at 5 - 20℃; | To a solution of <strong>[25475-67-6]3-aminoisoquinoline</strong> (4.00 g, 27.7 mmol) in ethanol (40 mL) and methylene chloride (80 mL) was added N-bromosuccinimide (5.18 g, 29.1 mmol) in divided portions at 5°C, then the mixture was stirred at 5°C for 2 hours and 20 minutes, and stirred at room temperature overnight. The reaction mixture was concentrated under reduced pressure, and the obtained brown residue was purified by a silica gel column chromatography (hexane:ethyl acetate = 50:50, hexane:ethyl acetate = 85:15?70:30, hexane:ethyl acetate = 90:10?75:25) to give 4-bromoisoquinoline-3-amine (4.65 g, 75percent) as a pale yellow solid. APCI-MS m/z: 223/225 [M+H]+. |
75% | With N-Bromosuccinimide; In ethanol; dichloromethane; at 5 - 20℃; for 2.33h; | To a solution of <strong>[25475-67-6]3-aminoisoquinoline</strong> (4.00 g, 27.7 mmol) in ethanol (40 mE) and methylene chloride (80 mE) was added N-bromosuccinimide (5.18 g, 29.1 mmol) in divided, portions at 5°C., then the mixture was stirred at 5°C. for 2 hours and 20 minutes, and stirred at room temperature overnight. The reaction mixture was concentrated under reduced pressure, and the obtained brown residue was purified by a silica gel column chromatography (hexane:ethyl acetate=50: 50. hexane:ethyl acetate=85:1 5?70:30, hexane:ethyl acetate=90: 10?75:25) to give 4-bromoisoquinoline-3- amine (4.65 g, 75percent) as a pale yellow solid.APCI-MS mlz: 223/225 [M+H]. |
67% | With N-Bromosuccinimide; In methanol; at 23 - 25℃; for 1h; | 3-Aminoisoquinoline (15 mmol, 1.0 equiv) was suspended in methanol (20 mL). A solution of N-bromosuccinimide (17 mmol, 1.2 equiv) in methanol (75 mL) was added dropwise through an additional funnl while keeping the internal temperature <25 °C. After stirring at 23 °C for lh, the methanol is removed under vacuum and the residue was partititionned between ethyl acetate and water. The layers were separated and the aqueous phase was back extracted with ethyl acetate (2x). The combined orgaffic layers were dried with Na2504 and concentrated onto silica gel (Sg) and purfied using flash silica gel chromatography (gradient of 0-50percent ethyl acetate/hexanes) to provide the desired compound in 67percent yield. 1HNIVIR (400 MHz, CDC13) 6 8.79 (s, 1H), 7.96 ? 7.82 (m, 1H), 7.80 (d, J = 8.2 Hz, 1H), 7.66 (ddd, J = 8.5, 6.9, 1.5 Hz, 1H), 7.41 ?7.29 (m, 1H), 5.07 (s, 2H). ESI-MS m/z = 223.1 [M + Hj. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
87% | With tris-(dibenzylideneacetone)dipalladium(0); johnphos; sodium t-butanolate; In toluene; for 5h;Inert atmosphere; | A round-bottomed flask was charged with Pd2(dba)3 (5 mol percent ), ligand (10 molpercent), aryl halide (1mmol), appropriate isoquinolinamine (1 mmol), base (1.5 mmol) and dry solvent (5 mL). Theflask was flushed with argon for 5 min. The mixture was heated at reflux under magnetic stirring.After cooling down to room temperature, the reaction mixture was concentrated and the residuewas purified by flash column chromatography on silica gel. |
85% | With tris-(dibenzylideneacetone)dipalladium(0); johnphos; sodium t-butanolate; In toluene; at 110℃; for 5h;Inert atmosphere; | A round-bottomed flask was charged with Pd2(dba)3 (0.233 g, 0.26 mmol, 5 mol percent), JohnPhos (0.152 g, 0.51 mmol, 10 mol percent), bromobenzene (0.800 g, 5.10 mmol), isoquinoline-3-amine (0.734 g, 5.10 mmol), and sodium tert-butoxide (0.735 g, 7.65 mmol) followed by dry toluene (20 mL). The flask was flushed with argon for 5 min. The resulting mixture was heated under reflux with magnetic stirring for 5 h. After cooling down to room temperature the reaction mixture was evaporated and the residue was purified by flash column chromatography on silica gel using hexane/EtOAc (4:1) as eluent yielding the product (0.940 g, 85percent). Yellow crystal; mp 101-102 °C (lit. mp 102-103 °C30); numax (KBr, cm-1): 3239, 3054, 1631, 1453, 741; deltaH (300 MHz, CDCl3): 6.91 (1H, s, NH), 7.08 (1H, dd, J=6.6 Hz, 6.4 Hz, H-4'), 7.20 (1H, s, H-4), 7.27-7.41 (5H, m, H-7, H-2', H-3', H-5', H-6'), 7.49-7.58 (2H, m, H-5, H-6), 7.81 (1H, d, J=8.2 Hz, H-8), 8.96 (1H, s, H-1); deltaC (75 MHz, CDCl3): 99.3 (C-4), 120.2 (C-2', C-6'), 122.9 (C-4'), 123.9 (C-7), 124.8 (C-8a), 125.5 (C-5), 128.0 (C-8), 129.7(C-3', C-5'), 130.8 (C-6), 138.8 (C-4a), 141.3 (C-1'), 152.3 (C-3, C-1). Anal. Calcd for C15H12N2 (220.26): C, 81.79; H, 5.49; N, 12.72percent. Found: C, 81.41; H, 5.56; N, 13.03percent. |