158221-57-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 158221-57-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,2,2 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 158221-57:
(8*1)+(7*5)+(6*8)+(5*2)+(4*2)+(3*1)+(2*5)+(1*7)=129
129 % 10 = 9
So 158221-57-9 is a valid CAS Registry Number.
158221-57-9Relevant articles and documents
An efficient, asymmetric synthesis of pipecolic acid and 2-alkyl pipecolic acids
Hou, Duen-Ren,Hung, Shin-Yi,Hu, Chung-Cheng
, p. 3858 - 3864 (2007/10/03)
Both (R)- and (S)-pipecolic acids and their 2-alkyl derivatives have been synthesized via diastereoselective alkylations of (R)-5-phenylmorpholin-2-one 5.
