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152628-02-9

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Basic Information
CAS No.: 152628-02-9
Name: 2-n-Propyl-4-methyl-6-(1-methylbenzimidazole-2-yl)benzimidazole
Article Data: 22
Cas Database
Molecular Structure:
Molecular Structure of 152628-02-9 (2-n-Propyl-4-methyl-6-(1-methylbenzimidazole-2-yl)benzimidazole)
Formula: C19H20N4
Molecular Weight: 304.395
Synonyms: 1,7'-Dimethyl-2'-propyl-2,5'-bibenzimidazole;4-Methyl-6-(1-methylbenzimidazol-2-yl)-2-propylbenzimidazole;1H-Benzimidazole-2-n-propyl-4-methyl-6-(1'-methylbenzimidazole-2'-yl);
EINECS: 604-866-6
Density: 1.23 g/cm3
Melting Point: 130-135 °C(Solv: tetrahydrofuran (109-99-9))
Boiling Point: 584.802 °C at 760 mmHg
Flash Point: 307.477 °C
Appearance: grey powder
PSA: 46.50000
LogP: 4.37750
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Synthetic route
25148-68-9

N-methylbenzene-1,2-diamine dihydrochloride

152628-03-0

4-methyl-2-n-propyl-1H-benzimidazole-6-carboxylic acid

152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

Conditions
ConditionsYield
With methanesulfonic acid In i-Amyl alcohol at 130 - 135℃; for 18h; Temperature; Solvent; Reagent/catalyst;93%
Stage #1: N-methylbenzene-1,2-diamine dihydrochloride; 4-methyl-2-n-propyl-1H-benzimidazole-6-carboxylic acid With PPA at 70 - 135℃; for 13.5h;
Stage #2: With ammonia In water at 30 - 90℃; for 1h; pH=8.0 - 8.5;		77.4%
With PPA at 150℃; for 20h;5.86 g
With polyphosphoric acid at 150℃; for 14h;

C19H21IN4

152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

Conditions
ConditionsYield
With copper(l) iodide; caesium carbonate In dimethyl sulfoxide at 130℃;93%

C19H21BrN4

152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

Conditions
ConditionsYield
With copper(l) iodide; caesium carbonate In dimethyl sulfoxide at 130℃;92%
4760-34-3

N-methyl-1,2-phenylenediamine

152628-03-0

4-methyl-2-n-propyl-1H-benzimidazole-6-carboxylic acid

152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

Conditions
ConditionsYield
Stage #1: N-methyl-1,2-phenylenediamine; 4-methyl-2-n-propyl-1H-benzimidazole-6-carboxylic acid With methanesulfonic acid; phosphorus pentoxide at 75 - 145℃;
Stage #2: With sodium hydroxide In water pH=< 3; Product distribution / selectivity;		90%
With polyphosphoric acid at 150 - 155℃; for 4h; Inert atmosphere;80%
With PPA at 150 - 155℃; Inert atmosphere;
Stage #1: N-methyl-1,2-phenylenediamine; 4-methyl-2-n-propyl-1H-benzimidazole-6-carboxylic acid at 70 - 130℃; for 8.5h;
Stage #2: With hydrogenchloride In methanol; water at 25℃; for 0.166667h;
Stage #3: With ammonium hydroxide In methanol; water at 25℃; for 1h; Reagent/catalyst;

C26H28N4O3S

152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

Conditions
ConditionsYield
With sodium hydroxide In water; acetonitrile at 20℃;90%

2-n-propyl-4-methyl-6-formylchlorobenzimidazole

N-methyl-o-phenylenediamine hydrochloride

152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

Conditions
ConditionsYield
Stage #1: 2-n-propyl-4-methyl-6-formylchlorobenzimidazole; N-methyl-o-phenylenediamine hydrochloride With triethylamine In dichloromethane at 40℃; for 3h; Large scale;
Stage #2: With acetic acid In dichloromethane at 60℃; for 5h; Temperature; Reagent/catalyst; Solvent; Large scale;		89.96%

C19H22N4O

152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

Conditions
ConditionsYield
With p-toluenesulfonyl chloride In water; acetonitrile at 0 - 20℃;88%
Multi-step reaction with 2 steps
1: triethylamine / acetonitrile / 0 - 20 °C
2: sodium hydroxide / acetonitrile; water / 20 °C
View Scheme
1345840-05-2

2-methyl-4-(1-methyl-1H-benzimidazol-2-yl)-6-nitrobenzenamine

123-72-8

butyraldehyde

152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

Conditions
ConditionsYield
With sodium dithionite In methanol; water for 12h; Reflux;85%

C19H21N3O*ClH

152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

Conditions
ConditionsYield
Stage #1: C19H21N3O*ClH With bis(trichloromethyl) carbonate; N,N-dimethyl-formamide In acetonitrile at 80 - 85℃; for 2h;
Stage #2: With hydroxylamine In acetonitrile at 20℃; for 1h;
Stage #3: With triethylamine; p-toluenesulfonyl chloride at 0 - 20℃;		85%
Multi-step reaction with 2 steps
1: N,N-dimethyl-formamide; bis(trichloromethyl) carbonate / acetonitrile / 2 h / 80 - 85 °C
2: p-toluenesulfonyl chloride / acetonitrile; water / 0 - 20 °C
View Scheme
Multi-step reaction with 3 steps
1: N,N-dimethyl-formamide; bis(trichloromethyl) carbonate / acetonitrile / 2 h / 80 - 85 °C
2: triethylamine / acetonitrile / 0 - 20 °C
3: sodium hydroxide / acetonitrile; water / 20 °C
View Scheme
81684-80-2

N1-methylbenzene-1,2-diamine hydrochloride

152628-03-0

4-methyl-2-n-propyl-1H-benzimidazole-6-carboxylic acid

A

884330-09-0

desmethyl dibenzimidazole

B

884330-18-1

7-methyl-2-propyl-3H-benzoimidazole-5-carboxylic acid(2-methylaminophenyl)amide

C

884330-17-0

3-amino-4-butyrylamino-5-methyl-N-(2-methylaminophenyl)benzamide

D

152628-02-9

2-n-propyl-4-methyl-6-(1-methylbenzimidazol-2-yl)benzimidazole

Conditions
ConditionsYield
With polyphosphoric acid at 150 - 155℃;A n/a
B n/a
C n/a
D 84%
...Expand
Raw Materials
4760-34-3
81684-80-2
884330-17-0
123-72-8
301533-59-5
884330-18-1
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Chemistry

Molecular structure of 2-n-Propyl-4-methyl-6-(1-methylbenzimidazole-2-yl)benzimidazole (CAS NO.152628-02-9) is:

Product Name: 2-n-Propyl-4-methyl-6-(1-methylbenzimidazole-2-yl)benzimidazole
CAS Registry Number: 152628-02-9
Molecular Formula: C19H20N4
Molecular Weight: 304.39 
Surface Tension: 45.191 dyne/cm
Density: 1.234 g/cm3
Flash Point: 307.477 °C
Enthalpy of Vaporization: 87.377 kJ/mol
Boiling Point: 584.802 °C at 760 mmHg
Product Categories: Chemical intermediate for Telmisartan;Intermediatesof;Imidazol&Benzimidazole;Imidazoles;(intermediate of telmisartan);Intermediates & Fine Chemicals;Pharmaceuticals;pharmaceutical intermediates

Specification

 2-n-Propyl-4-methyl-6-(1-methylbenzimidazole-2-yl)benzimidazole , its cas register number is 152628-02-9. It also can be called 1,7'-dimethyl-2'-propyl-1H,3'H-2,5'-bibenzimidazole .It is a grey powder.