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302800-57-3

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302800-57-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 302800-57-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,2,8,0 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 302800-57:
(8*3)+(7*0)+(6*2)+(5*8)+(4*0)+(3*0)+(2*5)+(1*7)=93
93 % 10 = 3
So 302800-57-3 is a valid CAS Registry Number.

302800-57-3Relevant articles and documents

An olefin metathesis route for the preparation of (1 → 6)-linked C-disaccharide glycals. A convergent and flexible approach to C-saccharide synthesis

Postema, Maarten H. D.,Calimente, Daniel,Liu, Lei,Behrmann, Tonja L.

, p. 6061 - 6068 (2000)

A convergent route to a variety of C-1-disaccharide glycals based on the olefin metathesis reaction of enol ethers and alkenes is described. The DCC-mediated coupling reaction of a variety of pentose enitols (1a-c) with a number of C-5- and C-6-monosaccharide carboxylic acids (2a-e) gave the corresponding esters 3a-1 in good yield. Methylenation of these compounds was followed by ring-closing metathesis, mediated by the Schrock molybdenum catalyst 8 in warm toluene, to provide the target C-disaccharide glycals 5a-1. The formed enol ether double bond in 5a was then transformed, via standard manipulations, into a variety of C-disaccharide derivatives 21-25.

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