257877-36-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 257877-36-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,8,7 and 7 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 257877-36:
(8*2)+(7*5)+(6*7)+(5*8)+(4*7)+(3*7)+(2*3)+(1*6)=194
194 % 10 = 4
So 257877-36-4 is a valid CAS Registry Number.
257877-36-4Relevant academic research and scientific papers
Copper-catalysed rearrangement of 4-substituted-2,3-1H-benzoxazine-1-thiones
Agirbas, Hikmet,Guener, Selahattin
, p. 257 - 263 (2007/10/03)
4-Substituted-2,3-1H-benzoxazine-1-thiones were prepared by the treatment of the corresponding benzoxazine-1-ones with P2S5. The thermal rearrangement of 4-substituted-2,3-1H-benzoxazine-1-thiones, catalysed by metallic copper, yield
