121583-18-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121583-18-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,5,8 and 3 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 121583-18:
(8*1)+(7*2)+(6*1)+(5*5)+(4*8)+(3*3)+(2*1)+(1*8)=104
104 % 10 = 4
So 121583-18-4 is a valid CAS Registry Number.
121583-18-4Relevant articles and documents
Investigations on the Synthesis of Thiazolobenzoxazines. Studies on the Chemistry of 1,4-Oxazines, XVII
Bartsch, Herbert,Erker, Thomas,Neubauer, Gustav
, p. 1439 - 1444 (1988)
Reaction of C2 unsubstituted benzoxazine derivative 2b with α-bromo compounds only yields the substitution products 4a, b and 7, whereas from the 2-benzoxazine carboxylate 9b the tricyclic heterocycle 12 is obtained.
