905946-11-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 905946-11-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,5,9,4 and 6 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 905946-11:
(8*9)+(7*0)+(6*5)+(5*9)+(4*4)+(3*6)+(2*1)+(1*1)=184
184 % 10 = 4
So 905946-11-4 is a valid CAS Registry Number.
905946-11-4Relevant articles and documents
Synthesis of 2,3-dihydrothiopyran-4-ones from 3-oxo-1-pentene-4-ynes
Rosiak, Anna,Mueller, Ralf M.,Christoffers, Jens
, p. 13 - 26 (2007/10/03)
3-Oxo-1-pentene-4-ynes were converted with sodium sulfide or hydrogensulfide to give 2,6-disubstituted 2,3-dihydrothiopyran-4-one derivatives. The starting materials were prepared in two steps from terminal alkynes and α,β-unsaturated aldehydes.