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16677-35-3

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16677-35-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16677-35-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,6,7 and 7 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 16677-35:
(7*1)+(6*6)+(5*6)+(4*7)+(3*7)+(2*3)+(1*5)=133
133 % 10 = 3
So 16677-35-3 is a valid CAS Registry Number.

16677-35-3Relevant articles and documents

DIASTEREOSELECTIVE HYDROGENATION OF MONODEHYDRO ENKEPHALINS CONTROLLED BY CHIRAL RHODIUM CATALYSTS

Hammadi, A.,Nuzillard, J. M.,Poulin, J. C.,Kagan, H. B.

, p. 1247 - 1262 (1992)

Protected (Z)dehydrophenylalanyl-Leu-enkephalin, (Z)dehydrotyrosyl-Leu-enkephalin and (Z)dehydrotyrosyl-(R)Ala2-Leu-enkephalin, have been synthesized.These compounds have been hydrogenated to give protected Leu-enkephalins in the presence of various chiral rhodium complexes.Deprotection of the product gave Leu-enkephalins or epimers, ytterbium in liquid ammonia allows smooth deprotection of NHCBz or OTs groups on small amounts of peptides.Strong stereocontrol could be achieved by suitable choice of the chiral catalyst.This method has good potential for stereospecific labelling of enkephalins and other small peptides.

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