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128561-73-9

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128561-73-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128561-73-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,5,6 and 1 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 128561-73:
(8*1)+(7*2)+(6*8)+(5*5)+(4*6)+(3*1)+(2*7)+(1*3)=139
139 % 10 = 9
So 128561-73-9 is a valid CAS Registry Number.

128561-73-9Relevant articles and documents

DIASTEREOSELECTIVITY IN THE CYCLIZATION OF 1-(2-(BENZYLOXYMETHYL)-3-BUTENYL)-5-ETHOXY-2-PYRROLIDINONES

Zonjee, Johannes N.,Koning, Henk de,Speckamp, W. Nico

, p. 7553 - 7564 (2007/10/02)

1-(2-(Benzyloxymethyl)-3-butenyl)-5-ethoxy-2-pyrrolidinones 12 cyclize upon formic acid treatment to indolizinones.The effect of some substituents α to the iminium carbon atom on the diastereoselectivity of the cyclization is discussed.

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