98123-30-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 98123-30-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,1,2 and 3 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 98123-30:
(7*9)+(6*8)+(5*1)+(4*2)+(3*3)+(2*3)+(1*0)=139
139 % 10 = 9
So 98123-30-9 is a valid CAS Registry Number.
98123-30-9Relevant articles and documents
A RING EXPANSION METHOD FOR THE PREPARATION OF 2,3-DIHYDRO-1,4-BENZOTHIAZINES FROM 2-ARYL-2,3-DIHYDROBENZOTHIAZOLES
Mashraqui, Sabir H.,Kellogg, Richard M.
, p. 1457 - 1460 (2007/10/02)
In the presence of KF in dimethylformamide (DMF) 2-aryl-2,3-dihydrobenzothiazoles react with α-haloketones to provide in good yield 2,3-dihydro-2,3-disubstituted-1,4-benzothiazines.