42251-17-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42251-17-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,2,5 and 1 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 42251-17:
(7*4)+(6*2)+(5*2)+(4*5)+(3*1)+(2*1)+(1*7)=82
82 % 10 = 2
So 42251-17-2 is a valid CAS Registry Number.
42251-17-2Relevant academic research and scientific papers
Improved preparation of tosyldiazomethane
Plessis,Uguen,De Cian,Fischer
, p. 5489 - 5493 (2007/10/03)
Treatment of the carbamate 2a by i-amyl nitrite and TMSCl in presence of a reduced amount of pyridine, followed by decomposition of the resulting nitroso derivative 3a with activated alumina afforded in high yield the pure, crystalline, diazosulfone 1a, a
