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209863-85-4

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209863-85-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 209863-85-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,8,6 and 3 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 209863-85:
(8*2)+(7*0)+(6*9)+(5*8)+(4*6)+(3*3)+(2*8)+(1*5)=164
164 % 10 = 4
So 209863-85-4 is a valid CAS Registry Number.

209863-85-4Relevant articles and documents

Stereoselective transformation of amines via chiral 2,4,6-triphenylpyridinium intermediates

Said, Sadri A.,Fiksdahl, Anne

, p. 1947 - 1951 (2001)

We herein report the preparation and the nucleophilic substitution of the chiral 2,4,6-triphenylpyridinium tetrafluoroborates 2a and 2b. The triphenylpyridinium intermediates were generated from homochiral amines (1a, 1b) and 2,4,6-triphenylpyrylium tetrafluoroborate and used as substrates for stereoselective nucleophilic substitution. The degree of inversion in the substitution reactions has been studied. The alcohol (3a, 3b) and azide (4a, 4b) products were obtained with >99 and 96-98% inversion of configuration, respectively.

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