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57857-64-4

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57857-64-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57857-64-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,8,5 and 7 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 57857-64:
(7*5)+(6*7)+(5*8)+(4*5)+(3*7)+(2*6)+(1*4)=174
174 % 10 = 4
So 57857-64-4 is a valid CAS Registry Number.

57857-64-4Relevant articles and documents

Reaction between Chalcones, 1,3-Dicarbonyl Compounds, and Elemental Sulfur: A One-Pot Three-Component Synthesis of Substituted Thiophenes

Adib, Mehdi,Rajai-Daryasarei, Saideh,Pashazadeh, Rahim,Jahani, Mehdi,Amanlou, Massoud

, p. 1583 - 1588 (2018/06/11)

A simple and atom-economic synthesis of highly substituted thiophenes is demonstrated. Heating a solution of a chalcone and a linear/cyclic 1,3-dicarbonyl compound with elemental sulfur in CH 3 CN in the presence of NEt 3 at 80 °C af

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