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57707-58-1

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57707-58-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57707-58-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,7,0 and 7 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 57707-58:
(7*5)+(6*7)+(5*7)+(4*0)+(3*7)+(2*5)+(1*8)=151
151 % 10 = 1
So 57707-58-1 is a valid CAS Registry Number.

57707-58-1Relevant articles and documents

Copper complex catalyzed asymmetric monosulfonylation of meso-vic-diols

Demizu, Yosuke,Matsumoto, Kazuya,Onomura, Osamu,Matsumura, Yoshihiro

, p. 7605 - 7609 (2008/03/14)

Asymmetric desymmetrization of meso-vic-diols was performed by tosylation in the presence of copper(II) triflate and (R,R)-Ph-BOX as a catalyst. The method was successfully applied to asymmetric desymmetrization of cyclic and acyclic meso-vic-diols in hig

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.

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