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4251-08-5

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4251-08-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4251-08-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,2,5 and 1 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4251-08:
(6*4)+(5*2)+(4*5)+(3*1)+(2*0)+(1*8)=65
65 % 10 = 5
So 4251-08-5 is a valid CAS Registry Number.

4251-08-5Relevant articles and documents

An isocyanide based multi-component reaction under catalyst- and solvent-free conditions for the synthesis of unsymmetrical thioureas

Singh, Karandeep,Sharma, Siddharth

, p. 197 - 201 (2016/12/28)

A new and efficient method for the synthesis of thiourea derivatives by a sequential one-pot, three-component reaction between aromatic isocyanides, amines, and 1,2-di-tert-butyldisulfane (DTBS) was developed and 27 different examples were synthesized in good to excellent yields. DTBS was identified as an effective sulfur surrogate without the use of both catalysts and solvents. This protocol does not employ any transition metal catalyst or special experimental setup.

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