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40794-89-6

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40794-89-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40794-89-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,7,9 and 4 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 40794-89:
(7*4)+(6*0)+(5*7)+(4*9)+(3*4)+(2*8)+(1*9)=136
136 % 10 = 6
So 40794-89-6 is a valid CAS Registry Number.

40794-89-6Downstream Products

40794-89-6Relevant articles and documents

ADDITION REGIOSELECTIVE D'ENOLATES DE CETONES AUX α-ENONES INFLUENCE DES FACTEURS STERIQUES SUR L'ORIENTATION ET LA REVERSIBILITE DES REACTIONS

Bertrand, J.,Gorrichon, L.,Maroni, P.

, p. 4127 - 4140 (2007/10/02)

Regio and stereochemistry in the addition of preformed magnesium and lithium ketone enolates (1 to 8) to α-enones (10 and 11) have been examined.When the substitution degree of the enolate is increased the formation of δ-diketone is favoured; neverthless a good efficiency in the synthesis of the γ-ethylenic β-ketols (1-2 addition) is obtained via bromomagnesium enolates (EMgX) under kinetic conditions.Lithium enolate (ELi) and, chiefly magnesium bienolate (E2Mg) give preferentially the Michael addition.Reversibility from 1-2 to 1-4 addition is commonly observed but the stereochemistry, if any, of the diastereoisomeric δ-diketones may be quite different when using EMgBr or E2Mg as starting enolates.

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