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200428-42-8

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200428-42-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 200428-42-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,0,4,2 and 8 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 200428-42:
(8*2)+(7*0)+(6*0)+(5*4)+(4*2)+(3*8)+(2*4)+(1*2)=78
78 % 10 = 8
So 200428-42-8 is a valid CAS Registry Number.

200428-42-8Relevant articles and documents

Studies on the scope and applications of the catalysed asymmetric addition of organolithium reagents to imines

Gittins, Catrin A.,North, Michael

, p. 3789 - 3799 (1997)

The sparteine induced asymmetric addition of organolithium reagents to α,β-unsaturated imines has been used to prepare non-racemic α-amino acids and their derivatives. The effect of various protecting groups for the nitrogen atom was investigated and p-methoxyphenyl derivatives were found to give the best enantiomeric excess whilst trimethylsilyl protected imines were the most versatile for subsequent manipulation.

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