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31750-57-9

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31750-57-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 31750-57-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,7,5 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 31750-57:
(7*3)+(6*1)+(5*7)+(4*5)+(3*0)+(2*5)+(1*7)=99
99 % 10 = 9
So 31750-57-9 is a valid CAS Registry Number.

31750-57-9Relevant articles and documents

Zn(ClO4)2·6H2O as a Powerful Catalyst for the Conversion of β-Ketoesters into β-Enamino Esters

Bartoli, Giuseppe,Bosco, Marcella,Locatelli, Manuela,Marcantoni, Enrico,Melchiorre, Paolo,Sambri, Letizia

, p. 239 - 242 (2004)

Zn(ClO4)2·6H2O proved to be a very powerful catalyst for the condensation of primary and secondary amines with β-ketoesters to give N-substituted β-enaminoesters.

VCl3 catalysed efficient synthesis of β-enamine esters and ketones from β-keto esters

Rajitha, Bavanthula,Reddy, Penthala Narsimha,Kumar, Buridapad Sunil,Srinivasulu, Neeladri,Reddy, Yerram Reddy Thirupathi

, p. 535 - 536 (2007/10/03)

VCl3 is a useful and efficient catalyst for the synthesis of β-enamine esters and ketones from β-keto esters with primary amines.

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