216171-43-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216171-43-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,1,7 and 1 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 216171-43:
(8*2)+(7*1)+(6*6)+(5*1)+(4*7)+(3*1)+(2*4)+(1*3)=106
106 % 10 = 6
So 216171-43-6 is a valid CAS Registry Number.
216171-43-6Relevant articles and documents
Efficient asymmetric synthesis of (S)-2-methylasparagine
Aoyagi, Yutaka,Williams, Robert M.
, p. 1099 - 1101 (2007/10/03)
(S)-2-methylasparagine was prepared from both (5S, 6R)-4-(benzyloxycarbonyl)-5,6-diphenyl-2,3,5,6-tetrahydro-4H-1,4-oxazin-2-one ((-)-1) and its antipode ((+)-1) via stereoselective glycine enolate alkylation as a key step.
