Structure of 31037-02-2
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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CAS No. : | 31037-02-2 |
Formula : | C7H11N3O2 |
M.W : | 169.18 |
SMILES Code : | C1=N[N](C(=C1C(OCC)=O)N)C |
MDL No. : | MFCD00051652 |
InChI Key : | MEUSJJFWVKBUFP-UHFFFAOYSA-N |
Pubchem ID : | 271299 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 12 |
Num. arom. heavy atoms | 5 |
Fraction Csp3 | 0.43 |
Num. rotatable bonds | 3 |
Num. H-bond acceptors | 3.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 43.98 |
TPSA ? Topological Polar Surface Area: Calculated from |
70.14 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.59 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
0.66 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
0.19 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
0.18 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
-0.21 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
0.48 |
Log S (ESOL):? ESOL: Topological method implemented from |
-1.42 |
Solubility | 6.51 mg/ml ; 0.0385 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (Ali)? Ali: Topological method implemented from |
-1.71 |
Solubility | 3.31 mg/ml ; 0.0195 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-0.91 |
Solubility | 20.7 mg/ml ; 0.122 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 |
No |
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) |
No |
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 |
-6.86 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) |
1.87 |
* 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 |
---|---|---|
81% | With tert.-butylnitrite; copper(ll) bromide; In acetonitrile; at 20 - 65℃; for 3.5h; | Intermediate 1: (5-Bromo-1-methyl-1H-pyrazol-4-yl)-(octahydro-quinolin-1-yl)methanone; Step 1. ; 5-Bromo-1-methyl-1H-pyrazole-4-carboxylic acid ethyl ester; To a mixture of t-butyl nitrite (29.5 mL, 221.5 mmol), cupric bromide (39.7 g, 177.5 mmol), and acetonitrile was added 5-amino-1-methyl-1H-pyrazole-4-carboxylic acid ethyl ester (25 g, 148 mmol) in portions over 30 minutes. The reaction mixture was stirred at ambient temperature for 2 h, then at 65 C. for 1 h. The mixture was then poured into 6N HCl (400 mL) and extracted with dichloromethane. After concentration in vacuo, the crude residue was purified by flash chromatography with a gradient of 0-20% ethyl acetate/hexanes to give 5-bromo-1-methyl-1H-pyrazole-4-carboxylic acid ethyl ester (28 g, 81%). |
68% | With tert.-butylnitrite; copper(ll) bromide; In acetonitrile; at 60℃; for 2h;Inert atmosphere; | 5-Amino-1-methyl-1H-pyrazole-4-carboxylic acid ethyl ester (5.0 g, 29.6 mmol) was added portionwise to a mixture of tert-butyl nitrite (4.57 g, 44.3 mmol) and copper (II) bromide (7.92 g, 35.5 mmol) in acetonitrile (20 mL). The mixture was heated to 60C for 2 h. The resulting mixture was poured into 6M HCl (200 mL) and extracted with dichloromethane (3 x 250 mL). The combined organics was dried on magnesium sulfate and concentrated in vacuo. The crude material was purified by column chromatography (SiO2, 0% to 50% ethyl acetate in hexanes) to afford 5-bromo-1-methyl-1H-pyrazole-4-carboxylic acid ethyl ester as an off-white solid (4.7 g, 68%). 1H NMR (CDCl3) : 7.93 (s, 1H), 4.32 (q, J = 7.2 Hz, 2H), 3.92 (s, 3H), 1.36 (t, J = 7.0 Hz, 3H). |
66% | With tert.-butylnitrite; copper(I) bromide; In acetonitrile; at 65℃; for 24h; | Step 1. Synthesis of ethyl 5-bromo-1-methyl-1H-pyrazole-4-carboxylate Copper(II) bromide (99%, 20.0 g, 88.6 mmol) and tert-butyl nitrite (90%, 14.1 mL, 107 mmol) were combined in acetonitrile (65 mL) and heated to 65 C. Ethyl 5-amino-1-methyl-1H-pyrazole-4-carboxylate (10.0 g, 59.1 mmol) was slowly added portion-wise {Caution: gas evolution!} and the reaction was maintained at 65 C. for 24 hours. The mixture was cooled to room temperature, poured into aqueous hydrochloric acid (3 N, 600 mL), diluted with ethyl acetate (300 mL) and stirred for 10 minutes. The aqueous layer was extracted with ethyl acetate (150 mL), and the combined organic layers were dried over magnesium sulfate, filtered and concentrated in vacuo. The residue was purified via silica gel chromatography (Gradient: 5% to 100% ethyl acetate in heptane, with a 5-minute hold at 32%), affording the product as a pale yellow solid. Yield: 9.10 g, 39.0 mmol, 66%. LCMS m/z 233.3 (M+1). 1H NMR (500 MHz, CDCl3) delta 1.36 (t, J=7.1 Hz, 3H), 3.92 (s, 3H), 4.32 (q, J=7.1 Hz, 2H), 7.93 (s, 1H). |
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