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172097-51-7

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172097-51-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 172097-51-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,0,9 and 7 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 172097-51:
(8*1)+(7*7)+(6*2)+(5*0)+(4*9)+(3*7)+(2*5)+(1*1)=137
137 % 10 = 7
So 172097-51-7 is a valid CAS Registry Number.

172097-51-7Downstream Products

172097-51-7Relevant articles and documents

Enantioselective Synthesis of Fully Protected anti 3-Amino-2-Hydroxy Butyrates

Pasto, Mireia,Moyano, Albert,Pericas, Miquel A.,Riera, Antoni

, p. 2329 - 2342 (2007/10/03)

An efficient enantioselective synthesis of fully protected anti 3-amino-2-hydroxybutyrates has been developed.Starting from enantiomerically enriched anti N-diphenylmethyl-3-amino-1,2-butanediol, after a change in the nitrogen protecting group, the primary alcohol was protected by regioselective reduction of the corresponding p-methoxybenzylidene acetal.Formation of the oxazolidine and deprotection of the primary alcohol followed by oxidation afforded protected α-hydroxy-β-amino acids in good yield.Since the source of asymmetry is a catalytic Sharpless epoxidation, both enantiomeric series are available and the methodology developed here is expected to be of broad applicability.

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