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173531-23-2

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173531-23-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173531-23-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,5,3 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 173531-23:
(8*1)+(7*7)+(6*3)+(5*5)+(4*3)+(3*1)+(2*2)+(1*3)=122
122 % 10 = 2
So 173531-23-2 is a valid CAS Registry Number.

173531-23-2Relevant articles and documents

Efficient stereocontrolled synthesis of D-erythro-sphingosine from N-benzoyl-D-glucosamine

Murakami, Teiichi,Hato, Masakatsu

, p. 823 - 827 (2007/10/03)

D-erythro-Sphingosine is synthesized from N-benzoyl-D-glucosamine 2 in a highly regio- and stereo-controlled manner. The key features in the synthesis involve the efficient conversion of compound 2 into the vinyl epoxide 10 and the subsequent SN2′-type reaction with a Grignard reagent in the presence of CuCN to afford the 1-O,2-N-protected sphingosine 11.

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