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197231-57-5

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197231-57-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 197231-57-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,2,3 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 197231-57:
(8*1)+(7*9)+(6*7)+(5*2)+(4*3)+(3*1)+(2*5)+(1*7)=155
155 % 10 = 5
So 197231-57-5 is a valid CAS Registry Number.

197231-57-5Relevant articles and documents

Vinylsulfones versus alkylsulfones in the addition to chiral imines. Synthesis of N-(tert-butoxycarbonyl)-L-homophenylalanine

Díez, David,García, Pilar,Marcos, Isidro S.,Basabe, Pilar,Garrido, Narciso M.,Broughton,Urones, Julio G.

, p. 11641 - 11648 (2007/10/03)

A study of the addition of vinylsulfones versus alkylsufones has been done, and applied to the synthesis of N-(tert-butoxycarbonyl)-L-homophenylalanine.

Enantioselective synthesis of (S)-Vigabatrin

Alcon, Montserrat,Poch, Marta,Moyano, Albert,Pericas, Miquel A.,Riera, Antoni

, p. 2967 - 2974 (2007/10/03)

An asymmetric synthesis of fully protected (S)-Vigabatrin has been developed. The key intermediate in the sequence is enantiomerically pure N-Boc-5-phenyl-3-amino-1,2-diol 5a, obtained from (E)-5-phenyl-2-penten-1-ol by employing a catalytic Sharpless epo

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