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94226-57-0

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94226-57-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 94226-57-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,2,2 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 94226-57:
(7*9)+(6*4)+(5*2)+(4*2)+(3*6)+(2*5)+(1*7)=140
140 % 10 = 0
So 94226-57-0 is a valid CAS Registry Number.

94226-57-0Relevant articles and documents

DIBENZYLAMINOACETATES AS USEFUL SYNTHETIC EQUIVALENTS OF GLYCINE IN THEi SYNTHESIS OF α-AMINO-β-HYDROXYACIDS

Guanti, Giuseppe,Banfi, Luca,Narisano, Enrica,Scolastico, Carlo

, p. 3671 - 3684 (2007/10/02)

The stereochemical course of three new simple methodologies for the preparation of α-amino-β-hydroxyacids starting from dibenzylaminoacetates as synthetic equivalents of glycine is described.While the aldol-type condensation via lithium enolates gave results highly dependent on the aldehyde employed, producing in some cases diastereoselectivities up to 5:1 for the anti isomers, the acid-catalysed aldol condensation of silyl ketene acetals yielded predominantly syn adducts with selectivities from 5:1 to 32:1.Finally the acylation-reduction procedure gave the best results in terms of yields and stereoselectivities, affording syn isomers with excellent induction ( 13:1).

DIASTEREOSELECTIVE SYNTHESIS OF α-AMINO-β-HYDROXYACIDS

Guanti, Giuseppe,Banfi, Luca,Narisano, Enrica,Scolastico, Carlo

, p. 4693 - 4696 (2007/10/02)

threo-α-Dibenzylamino-β-hydroxyesters (2) have been synthesised with high diastereoselectivity through the reduction of α-dibenzylamino-β-oxoesters (4) and then transformed into threo-α-amino-β-hydroxyacids.

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