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2-(2-Carboxy-3,4-dimethoxyphenyl)benzimidazole is a benzimidazole derivative synthesized by the condensation of opianic acid with o-phenylenediamine in methanol or ethanol, followed by dehydration in refluxing acetic or propionic anhydride to form 11H-1,2-dimethoxyisoindolo[2,3-a]benzimidazole. 2-(2-carboxy-3,4-dimethoxyphenyl)benzimidazole serves as an intermediate in the synthesis of more complex heterocyclic structures.

313240-02-7

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313240-02-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 313240-02-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,1,3,2,4 and 0 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 313240-02:
(8*3)+(7*1)+(6*3)+(5*2)+(4*4)+(3*0)+(2*0)+(1*2)=77
77 % 10 = 7
So 313240-02-7 is a valid CAS Registry Number.

313240-02-7Downstream Products

313240-02-7Relevant academic research and scientific papers

A new laccase-catalyzed domino process and its application to the efficient synthesis of 2-aryl-1H-benzimidazoles

Leutbecher, Heiko,Constantin, Mihaela-Anca,Mika, Sabine,Conrad, Jürgen,Beifuss, Uwe

, p. 605 - 608 (2011)

The laccase-catalyzed domino reaction of o-phenylenediamine and benzaldehydes with aerial oxygen as the oxidant exclusively yields 2-aryl-1H-benzimidazoles in good to very good yields. It is easy to perform under very mild reaction conditions.

Opianic acid in the synthesis of benzimidazole derivatives

Borodkin,Ukhin, L. Yu.,Belousova,Shepelenko,Alekseenko

, p. 118 - 120 (2017)

Heating an equimolar mixture of opianic acid and o-phenylenediamine in MeOH or EtOH produced 2-(2-carboxy-3,4-dimethoxyphenyl)benzimidazole, which was readily dehydrated in refluxing acetic or propionic anhydride to 11H-1,2-dimethoxyisoindolo[2,3-a]benzim

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