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54656-60-9

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54656-60-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54656-60-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,6,5 and 6 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 54656-60:
(7*5)+(6*4)+(5*6)+(4*5)+(3*6)+(2*6)+(1*0)=139
139 % 10 = 9
So 54656-60-9 is a valid CAS Registry Number.

54656-60-9Relevant articles and documents

A New Approach to L-Daunosamine and L-Acosamine from t-Butyl S-(+)-3-Hydroxybutanoate

Hatanaka, Minoru,Ueda, Ikuo

, p. 61 - 64 (2007/10/02)

A concise synthesis of the N-acyl derivatives of L-daunosamine and L-acosamine is achieved using the highly stereoselective enolate-imine condensation of the lithium dianion of t-Butyl (S)-(+)-3-hydroxybutanoate with N-acylaldimine.

SYNTHESIS OF (L)-DAUNOSAMINE AND RELATED AMINO SUGARS

Sammes, Peter G.,Thetford, Dean

, p. 111 - 124 (2007/10/02)

1-(2-Furyl)ethanol (6) has been converted into methyl (+/-)-daunosaminide (1) and methyl (+/-)-ristosaminide (3) by use of an intramolecular cyclisation of a trichloroacetimidate group. (+/-)-Daunosamine (1) has been obtained more directly from the alcohol (10) by use of a modified Mitsunobu reaction; the scope of the latter reaction has been explored using cyclohex-2-en-1-ol as a model substrate.Asymmetric reduction of 2-acetylfuran (5) has given (S)-1-(2-furyl)ethanol (46) in good enantiomeric excess, thus providing a short route to the L-enantiomers of the amino sugars (1), (2), and (3) from a cheap, non-carbohydrate precursor.

A New Route to (+/-)-Daunosamine and Related Amino-sugars

Sammes, Peter G.,Thetford, Dean

, p. 352 - 353 (2007/10/02)

1-(2-Furyl)ethanol has been converted into (+/-)-daunosamine by use of a modified Mitsunobu reaction.

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