81668-67-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81668-67-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,6 and 8 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81668-67:
(7*8)+(6*1)+(5*6)+(4*6)+(3*8)+(2*6)+(1*7)=159
159 % 10 = 9
So 81668-67-9 is a valid CAS Registry Number.
81668-67-9Relevant articles and documents
α-C-Glycopyranosides from Lewis Acid Catalysed Condensations of Acetylated Glycals and Enol Silanes
Dawe, Robert David,Fraser-Reid, Bert
, p. 1180 - 1181 (1981)
Acetylated glycals undergo Lewis acid-catalysed condensations with enol silanes in virtually quantitative yields to form C-glycopyranosides in which the thermodynamically unfavourable α-'anomers' are formed predominantly.