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258351-75-6

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258351-75-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 258351-75-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,8,3,5 and 1 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 258351-75:
(8*2)+(7*5)+(6*8)+(5*3)+(4*5)+(3*1)+(2*7)+(1*5)=156
156 % 10 = 6
So 258351-75-6 is a valid CAS Registry Number.

258351-75-6Relevant articles and documents

Silylcupration of (R)-2,2-dimethyl-3-(tert-butoxycarbonyl)-4- ethynyloxazolidine: A stereoselective approach to the synthesis of γ- silylated saturated and unsaturated α-amino acids

Reginato, Gianna,Mordini, Alessandro,Valacchi, Michela,Grandini, Elena

, p. 9211 - 9216 (1999)

Enantioselective synthesis of γ-silylated amino acids is reported, using a four-step procedure based on the silylcupration of ethynyloxazolidine 2. Silylcuprates 6a-c are highlighted as useful reagents to be employed with enantiomerically enriched substrates. Vinylsilanes 5 are easily prepared and highlighted as useful intermediates to yield the final compounds after reduction, opening of the oxazolidine ring, and oxidation. Moreover, β,γ- unsaturated amino acids are obtained as very interesting vinylglycine derivatives. The capability of silicon-containing amino acids to be incorporated into dipeptides is also shown.

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