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Chemical Structure| 1722-10-7 Chemical Structure| 1722-10-7

Structure of 3-Chloro-6-methoxypyridazine
CAS No.: 1722-10-7

Chemical Structure| 1722-10-7

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Synonyms: 3-Methoxy-6-chloropyridazine

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Product Details of [ 1722-10-7 ]

CAS No. :1722-10-7
Formula : C5H5ClN2O
M.W : 144.56
SMILES Code : COC1=NN=C(Cl)C=C1
Synonyms :
3-Methoxy-6-chloropyridazine
MDL No. :MFCD00006467
InChI Key :XBJLKXOOHLLTPG-UHFFFAOYSA-N
Pubchem ID :74403

Safety of [ 1722-10-7 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Computational Chemistry of [ 1722-10-7 ] Show Less

Physicochemical Properties

Num. heavy atoms 9
Num. arom. heavy atoms 6
Fraction Csp3 0.2
Num. rotatable bonds 1
Num. H-bond acceptors 3.0
Num. H-bond donors 0.0
Molar Refractivity 33.53
TPSA ?

Topological Polar Surface Area: Calculated from
Ertl P. et al. 2000 J. Med. Chem.

35.01 Ų

Lipophilicity

Log Po/w (iLOGP)?

iLOGP: in-house physics-based method implemented from
Daina A et al. 2014 J. Chem. Inf. Model.

1.63
Log Po/w (XLOGP3)?

XLOGP3: Atomistic and knowledge-based method calculated by
XLOGP program, version 3.2.2, courtesy of CCBG, Shanghai Institute of Organic Chemistry

0.89
Log Po/w (WLOGP)?

WLOGP: Atomistic method implemented from
Wildman SA and Crippen GM. 1999 J. Chem. Inf. Model.

1.14
Log Po/w (MLOGP)?

MLOGP: Topological method implemented from
Moriguchi I. et al. 1992 Chem. Pharm. Bull.
Moriguchi I. et al. 1994 Chem. Pharm. Bull.
Lipinski PA. et al. 2001 Adv. Drug. Deliv. Rev.

0.74
Log Po/w (SILICOS-IT)?

SILICOS-IT: Hybrid fragmental/topological method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

1.56
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

1.19

Water Solubility

Log S (ESOL):?

ESOL: Topological method implemented from
Delaney JS. 2004 J. Chem. Inf. Model.

-1.72
Solubility 2.73 mg/ml ; 0.0189 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Very soluble
Log S (Ali)?

Ali: Topological method implemented from
Ali J. et al. 2012 J. Chem. Inf. Model.

-1.21
Solubility 8.91 mg/ml ; 0.0617 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Very soluble
Log S (SILICOS-IT)?

SILICOS-IT: Fragmental method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

-2.37
Solubility 0.612 mg/ml ; 0.00424 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble

Pharmacokinetics

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)
and tested on 415 molecules (test set)
10-fold CV: ACC=0.72 / AUC=0.77
External: ACC=0.88 / AUC=0.94

No
CYP1A2 inhibitor?

Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.83 / AUC=0.90
External: ACC=0.84 / AUC=0.91

No
CYP2C19 inhibitor?

Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.80 / AUC=0.86
External: ACC=0.80 / AUC=0.87

No
CYP2C9 inhibitor?

Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set)
and tested on 2075 molecules (test set)
10-fold CV: ACC=0.78 / AUC=0.85
External: ACC=0.71 / AUC=0.81

No
CYP2D6 inhibitor?

Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set)
and tested on 1068 molecules (test set)
10-fold CV: ACC=0.79 / AUC=0.85
External: ACC=0.81 / AUC=0.87

No
CYP3A4 inhibitor?

Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set)
and tested on 2579 molecules (test set)
10-fold CV: ACC=0.77 / AUC=0.85
External: ACC=0.78 / AUC=0.86

No
Log Kp (skin permeation)?

Skin permeation: QSPR model implemented from
Potts RO and Guy RH. 1992 Pharm. Res.

-6.55 cm/s

Druglikeness

Lipinski?

Lipinski (Pfizer) filter: implemented from
Lipinski CA. et al. 2001 Adv. Drug Deliv. Rev.
MW ≤ 500
MLOGP ≤ 4.15
N or O ≤ 10
NH or OH ≤ 5

0.0
Ghose?

Ghose filter: implemented from
Ghose AK. et al. 1999 J. Comb. Chem.
160 ≤ MW ≤ 480
-0.4 ≤ WLOGP ≤ 5.6
40 ≤ MR ≤ 130
20 ≤ atoms ≤ 70

None
Veber?

Veber (GSK) filter: implemented from
Veber DF. et al. 2002 J. Med. Chem.
Rotatable bonds ≤ 10
TPSA ≤ 140

0.0
Egan?

Egan (Pharmacia) filter: implemented from
Egan WJ. et al. 2000 J. Med. Chem.
WLOGP ≤ 5.88
TPSA ≤ 131.6

0.0
Muegge?

Muegge (Bayer) filter: implemented from
Muegge I. et al. 2001 J. Med. Chem.
200 ≤ MW ≤ 600
-2 ≤ XLOGP ≤ 5
TPSA ≤ 150
Num. rings ≤ 7
Num. carbon > 4
Num. heteroatoms > 1
Num. rotatable bonds ≤ 15
H-bond acc. ≤ 10
H-bond don. ≤ 5

1.0
Bioavailability Score?

Abbott Bioavailability Score: Probability of F > 10% in rat
implemented from
Martin YC. 2005 J. Med. Chem.

0.55

Medicinal Chemistry

PAINS?

Pan Assay Interference Structures: implemented from
Baell JB. & Holloway GA. 2010 J. Med. Chem.

0.0 alert
Brenk?

Structural Alert: implemented from
Brenk R. et al. 2008 ChemMedChem

0.0 alert: heavy_metal
Leadlikeness?

Leadlikeness: implemented from
Teague SJ. 1999 Angew. Chem. Int. Ed.
250 ≤ MW ≤ 350
XLOGP ≤ 3.5
Num. rotatable bonds ≤ 7

No; 1 violation:MW<1.0
Synthetic accessibility?

Synthetic accessibility score: from 1 (very easy) to 10 (very difficult)
based on 1024 fragmental contributions (FP2) modulated by size and complexity penaties,
trained on 12'782'590 molecules and tested on 40 external molecules (r2 = 0.94)

2.23

Application In Synthesis of [ 1722-10-7 ]

* 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.

  • Downstream synthetic route of [ 1722-10-7 ]

[ 1722-10-7 ] Synthesis Path-Downstream   1~3

  • 1
  • [ 1722-10-7 ]
  • [ 13211-32-0 ]
  • [ 1591827-18-7 ]
YieldReaction ConditionsOperation in experiment
With silver nitrate; In water; trifluoroacetic acid; Step 1: 4-(tert-butoxymethyl)-6-chloro-3-methoxypyridazine To a mixture of tert-butoxy-acetic acid (5.7 g, 43 mmol) in TFA/water (20 mol percent, 48 mL) were added 3-chloro-6-methoxypyridazine (3.8 g, 26 mmol) and AgNO3 (0.42 g, 2.4 mmol). The mixture was heated to 70° C., then a solution of (NH4)2S2O8 (10.6 g, 46 mmol) in water (8 mL) was added dropwise. After addition, the mixture was stirred at 70-80° C. for 30 min. After cooling to r.t, the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography (petroleum ether: ethyl acetate (6:1) as eluent) to afford a mixture containing 4-(tert-butoxymethyl)-6-chloro-3-methoxypyridazine and 20-30percent 4-(tert-butoxymethyl)-3-chloro-6-methoxypyridazine (1.5 g).
  • 2
  • [ 67-56-1 ]
  • [ 1722-10-7 ]
  • [ 201230-82-2 ]
  • [ 13211-32-0 ]
  • [ 1591827-20-1 ]
  • [ 1591827-21-2 ]
YieldReaction ConditionsOperation in experiment
0.36 g; 0.1 g To a mixture of tert-butoxy-acetic acid (5.7 g, 43 mmol) in TFA/ water (20 molpercent, 48 mL) were added 3-chloro-6-methoxypyridazine (3.8 g, 26 mmol) and AgN03 (0.42 g, 2.4 mmol). The mixture was heated to 70 C, then a solution of (NH4)2S208 (10.6 g, 46 mmol) in water (8 mL) was added dropwise. After addition, the mixture was stirred at 70-80 C for 30 min. After cooling to r.t, the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography (petroleum ether: ethyl acetate (6: 1) as eluent) to afford a mixture containing 4-(tert-butoxymethyl)-6-chloro-3-methoxypyridazine and 20-30percent 4-(tert-butoxymethyl)- 3-chloro-6-methoxypyridazine (1.5 g). A mixture of 4-(tert-butoxymethyl)-6-chloro-3-methoxypyridazine containing 20- 30percent 4-(tert-butoxymethyl)-3-chloro-6-methoxypyridazine (1.3 g, 5.6 mmol), ethyl acetate (1 mL, 7.2 mmol) and Pd(dppf)Cl2 (130 mg) in MeOH (100 mL) was heated to 70 C with stirring under CO (50 psi) for 10 hr. After cooling, the mixture was poured into water and extracted with ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulfate, filtered and concentrated under vacuum. The residue was purified by column chromatography (petroleum ether/ethyl acetate (3: 1) as eluent to afford methyl-5-(tert-butoxymethyl)-6-methoxypyridazine-3- carboxylate (0.36 g) and methyl 4-(tert-butoxymethyl)-6-methoxy pyridazine-3- carboxy late (0.1 g). MS (ESI) m/z 255 (M+H)+ Methyl 4-(tert-butoxymethyl)-6-methoxypyridazine-3 -carboxylate 1H NMR (CDCls, 400 MHz): delta 8.22 (s, 1H), 4.40 (s, 2H), 4.22 (s, 3H), 4.02 (s, 3H), 1.29 (s, 9H). Methyl 5 -(tert-butoxymethyl)-6-methoxypyridazine-3 -carboxylate 1H NMR (CDC13, 400 MHz): delta 7.40 (s, 1H), 4.77 (s, 2H), 4.20 (s, 3H), 4.00 (s, 3H), 1.29 (s, 9H).
  • 3
  • [ 1722-10-7 ]
  • [ 13211-32-0 ]
  • [ 1591827-18-7 ]
  • [ 1591827-19-8 ]
YieldReaction ConditionsOperation in experiment
With ammonium persulfate; silver nitrate; In water; at 70 - 80℃; for 0.5h; To a mixture of tert-butoxy-acetic acid (5.7 g, 43 mmol) in TFA/ water (20 molpercent, 48 mL) were added 3-chloro-6-methoxypyridazine (3.8 g, 26 mmol) and AgN03 (0.42 g, 2.4 mmol). The mixture was heated to 70 C, then a solution of (NH4)2S208 (10.6 g, 46 mmol) in water (8 mL) was added dropwise. After addition, the mixture was stirred at 70-80 C for 30 min. After cooling to r.t, the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by column chromatography (petroleum ether: ethyl acetate (6: 1) as eluent) to afford a mixture containing 4-(tert-butoxymethyl)-6-chloro-3-methoxypyridazine and 20-30percent 4-(tert-butoxymethyl)- 3-chloro-6-methoxypyridazine (1.5 g).
 

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