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4237-19-8

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4237-19-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4237-19-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,2,3 and 7 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 4237-19:
(6*4)+(5*2)+(4*3)+(3*7)+(2*1)+(1*9)=78
78 % 10 = 8
So 4237-19-8 is a valid CAS Registry Number.

4237-19-8Relevant articles and documents

First total synthesis of a naturally occurring iodinated 5′-deoxyxylofuranosyl marine nucleoside

Sun, Jianyun,Dou, Yanhui,Ding, Haixin,Yang, Ruchun,Sun, Qi,Xiao, Qiang

, p. 881 - 889 (2012/07/14)

4-Amino-7-(5′-deoxy-β-D-xylofuranosyl)-5-iodo-pyrrolo[2,3-d] pyrimidine 1, an unusual naturally occurring marine nucleoside isolated from an ascidan, Diplosoma sp., was synthesized from D-xylose in seven steps with 28% overall yield on 10 g scale. The key step was Vorbrueggen glycosylation of 5-iodo-pyrrolo[2,3-d]pyrimidine with 5-deoxy-1, 2-O-diacetyl-3-O-benzoyl-D- xylofuranose. Its absolute configuration was confirmed.

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