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260997-31-7

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260997-31-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 260997-31-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,0,9,9 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 260997-31:
(8*2)+(7*6)+(6*0)+(5*9)+(4*9)+(3*7)+(2*3)+(1*1)=167
167 % 10 = 7
So 260997-31-7 is a valid CAS Registry Number.

260997-31-7Relevant articles and documents

Asymmetric synthesis of a highly functionalized β-amino acid: The key amino acid of sperabillins B and D

Davies, Stephen G.,Ichihara, Osamu

, p. 9313 - 9316 (1999)

The asymmetric synthesis of the highly functionalized (3R,5R,6R)-3,6-diamino-5-hydroxyheptanoic acid, the key amino acid fragment of sperabillins B and D, was achieved by an asymmetric Michael addition of lithium (R)-(α-methylbenzyl)allylamide 10 to (E,E)-2,5-heptadienoate establishing the C-3 stereogenic centre, the information from which was propagated to the C-5 and C-6 centres by a highly stereoselective iodocyclocarbamation reaction.

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