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19490-62-1

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19490-62-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19490-62-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,4,9 and 0 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 19490-62:
(7*1)+(6*9)+(5*4)+(4*9)+(3*0)+(2*6)+(1*2)=131
131 % 10 = 1
So 19490-62-1 is a valid CAS Registry Number.

19490-62-1Downstream Products

19490-62-1Relevant articles and documents

Stereochemistry of Dithianyllithium Addition to Cyclohexanone

Juaristi, Eusebio,Cruz-Sanchez, J. Samuel,Ramos-Morales, F. Rafael

, p. 4912 - 4917 (2007/10/02)

The reaction of 2-phenyl-1,3-dithianyllithium (1-Li) with 4-tert-butylcyclohexanone in cyclohexane and tetrahydrofuran may proceed either with kinetic or thermodynamic control.In the latter case carbinol formation involves exclusively equatorial attack.In contrast, only kinetic control is seen in the reaction of the same ketone with 1,3-dithianyllithium (2-Li) or its mono-S-oxide (3-Li).No addition but only enolate formation occurs in solvent hexamethylphosphoric triamide; with 1--4-tert-butylcyclohexanol reversal of the addition reaction is seen in this solvent.

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