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254100-61-3

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254100-61-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 254100-61-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,4,1,0 and 0 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 254100-61:
(8*2)+(7*5)+(6*4)+(5*1)+(4*0)+(3*0)+(2*6)+(1*1)=93
93 % 10 = 3
So 254100-61-3 is a valid CAS Registry Number.

254100-61-3Relevant articles and documents

A simple resolution procedure using the Staudinger reaction for the preparation of P-stereogenic phosphine oxides

Andersen,Ramsden,Che,Parvez,Keay

, p. 7478 - 7486 (2007/10/03)

The resolution of a variety of (±)-P-stereogenic phosphines is achieved by exploiting the Staudinger reaction of a (±)-phosphine with enantiopure (1S,2R)-O-(tert-butyldimethylsilyl)isobornyl-10-sulfonyl azide. The resulting mixtures of diastereomeric phosphinimines are generally separable by fractional crystallization or flash chromatography. Subsequent acid-catalyzed hydrolysis provides the corresponding optically pure phosphine oxides in high yields.

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