495-74-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 495-74-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,9 and 5 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 495-74:
(5*4)+(4*9)+(3*5)+(2*7)+(1*4)=89
89 % 10 = 9
So 495-74-9 is a valid CAS Registry Number.
InChI:InChI=1/C12H8O/c1-2-3-5-10-12(13)11-8-6-4-7-9-11/h4,6-9H,1H3
495-74-9Relevant academic research and scientific papers
ACYLATION REACTIONS OF SILYLATED BUTADIYNES: SYNTHESIS OF SOME NATURALLY OCCURRING DIACETYLENIC KETONES
Jones, Graham E.,Holmes, Andrew B.
, p. 3203 - 3206 (2007/10/02)
Acylation of 4-substituted 1-trimethylsilylbuta-1,3-diynes (2) with suitable acyl halides in the presence of titanium tetrachloride gave diacetylenic ketones (3) including the naturally occurring compounds (3c), (3e), and (3f).