220006-57-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220006-57-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,0,0 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 220006-57:
(8*2)+(7*2)+(6*0)+(5*0)+(4*0)+(3*6)+(2*5)+(1*7)=65
65 % 10 = 5
So 220006-57-5 is a valid CAS Registry Number.
220006-57-5Relevant articles and documents
Rapid synthesis of α,β-didehydroaspartic-acid derivatives carrying a β-substituent
Schottelius, Marc J.,Chen, Peter
, p. 2341 - 2347 (2007/10/03)
A convenient preparation of N-(alkoxycarbonyl)-2,3-didehydroaspartic acid anhydrides 4 with substitution at the 3-position is reported. The key step is a cobalt-mediated acylation of an acetylene moiety, producing the highly functionalized didehydroamine
