117657-71-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117657-71-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,6,5 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 117657-71:
(8*1)+(7*1)+(6*7)+(5*6)+(4*5)+(3*7)+(2*7)+(1*1)=143
143 % 10 = 3
So 117657-71-3 is a valid CAS Registry Number.
117657-71-3Relevant academic research and scientific papers
Bures, Edward J.,Keay, Brian A.
, p. 5965 - 5968 (1987)
Numerous 3--furans and -thiophenes undergo a 1,4 O->C silyl migration when treated with n-BuLi/HMPA in THF or DME to produce 2-(trialkylsilyl)-3-(hydroxymethyl)-furans and -thiophenes in good yields.
