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1433174-92-5

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1433174-92-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1433174-92-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,3,3,1,7 and 4 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1433174-92:
(9*1)+(8*4)+(7*3)+(6*3)+(5*1)+(4*7)+(3*4)+(2*9)+(1*2)=145
145 % 10 = 5
So 1433174-92-5 is a valid CAS Registry Number.

1433174-92-5Relevant articles and documents

Controlling the α/γ-Reactivity of Vinylogous Ketone Enolates in Organocatalytic Enantioselective Michael Reactions

Iriarte, Igor,Olaizola, Olatz,Vera, Silvia,Gamboa, I?aki,Oiarbide, Mikel,Palomo, Claudio

supporting information, p. 8860 - 8864 (2017/07/17)

The first regio-, diastereo-, and enantioselective direct Michael reaction of β,γ-unsaturated ketones with nitroolefins is enabled by Br?nsted base/hydrogen-bonding bifunctional catalysis. A squaramide-substituted tertiary amine catalyzes the reaction of a broad range of β,γ-unsaturated ketones to proceed at the α-site exclusively, giving rise to adducts with two consecutive tertiary carbon stereocenters in diastereomeric ratios of up to >20:1 and enantioselectivities generally in the 90–98 % ee range.

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