116556-67-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 116556-67-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,6,5,5 and 6 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 116556-67:
(8*1)+(7*1)+(6*6)+(5*5)+(4*5)+(3*6)+(2*6)+(1*7)=133
133 % 10 = 3
So 116556-67-3 is a valid CAS Registry Number.
116556-67-3Relevant articles and documents
Preparation of Derivatives of (R)-1,2,4-Butanetriol from L-Ascorbic Acid
Luk, Kin-Chun,Wei, Chung-Chen
, p. 226 - 228 (1988)
Methyl 3,4-O-isopropylidene L-threonate (3), obtained from L-ascorbic acid, was converted to its O-phenyl thiocarbonate 4.Deoxygenation of 4 with tri-n-butyltin hydride gave the protected 3,4-dihydroxybutanoate 5, which was converted to the (R)-1,2,4-butanetriol derivatives 6 and 7.
