75620-44-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 75620-44-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,6,2 and 0 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 75620-44:
(7*7)+(6*5)+(5*6)+(4*2)+(3*0)+(2*4)+(1*4)=129
129 % 10 = 9
So 75620-44-9 is a valid CAS Registry Number.
75620-44-9Relevant academic research and scientific papers
New Method for the Preparation of 1,5-Benzothiazepine-2,4(3H,5H)-diones
Ried, Walter,Sell, Gunther
, p. 1252 - 1258 (2007/10/02)
The 2,3-dihydro-1,5-benzothiazepin-4(5H)-ones 1a-i react with sulfuryl chloride to give the 2-chloro-1,5-benzothiazepin-4(5H)-ones 3a-i, which are converted into the corresponding 1,5-benzothiazepine-2,4(3H,5H)-diones 4a-i by conc. sulfuric acid.
