221113-90-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221113-90-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,1 and 3 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221113-90:
(8*2)+(7*2)+(6*1)+(5*1)+(4*1)+(3*3)+(2*9)+(1*0)=72
72 % 10 = 2
So 221113-90-2 is a valid CAS Registry Number.
221113-90-2Relevant academic research and scientific papers
Reaction of α,β-spiro epoxy alkanones: Part VI - Reactions of spirononanones with amines and thiourea
Sayed, H. H.
, p. 1054 - 1058 (2007/10/03)
2-Aryl-1-oxaspironon-4-one 1a,b on reactions with amines give compounds 2a-d and 3a-d. Compounds 3a-d react with thiourea to give quinazoline thiones 4a-d which on treatment with chloroacetic acid furnish compound 5. Compound 5 on condensation with a
