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205526-52-9

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205526-52-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 205526-52-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,5,2 and 6 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 205526-52:
(8*2)+(7*0)+(6*5)+(5*5)+(4*2)+(3*6)+(2*5)+(1*2)=109
109 % 10 = 9
So 205526-52-9 is a valid CAS Registry Number.

205526-52-9Relevant articles and documents

Facile diastereoselective reactions of chiral 1,3-oxazolidines with grignard reagents; asymmetric syntheses of 2-substituted and 2,6-disubstituted piperidines

Poerwono, Hadi,Higashiyama, Kimio,Yamauchi, Takayasu,Takahashi, Hiroshi

, p. 385 - 400 (2007/10/03)

(S)- and (R)-2-Phenylpiperidines, (S)- and (R)-2-methylpiperidines, meso- and (2R, 6R)-2,6-diphenylpiperidines, and meso- and (25, 65)-2,6-dimethylpiperidines were synthesized asymmetrically starting from the diastereoselective addition of Grignard reagents to chiral 1,3-oxazolidines, converting of 1-aza-4-oxabicyclo[4.3.0]nonane derivatives as pivotal intermediates.

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