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55844-55-8

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55844-55-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 55844-55-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,8,4 and 4 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 55844-55:
(7*5)+(6*5)+(5*8)+(4*4)+(3*4)+(2*5)+(1*5)=148
148 % 10 = 8
So 55844-55-8 is a valid CAS Registry Number.

55844-55-8Relevant academic research and scientific papers

Transesterification of trimethyl orthoacetate: An efficient protocol for the synthesis of 4-alkoxy-2-aminothiophene-3-carbonitriles

Venkata Rao,Balakumar,Lakshmi Narayana,Pran Kishore,Rajwinder,Raghuram Rao

supporting information, p. 1274 - 1278 (2013/03/13)

A facile one-pot method is reported for the synthesis of 4-alkoxy-2-aminothiophene-3-carbonitriles. Transesterification of trimethylorthoacetate technique allowed introducing alkoxy substituents into 2-aminothiophene ring system. Diverse alkoxy substituents could be introduced efficiently by using this methodology. Further the synthesis of some of new 4-alkylamino-2-aminothiophenes is also reported.

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