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218152-32-0

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218152-32-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 218152-32-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,8,1,5 and 2 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 218152-32:
(8*2)+(7*1)+(6*8)+(5*1)+(4*5)+(3*2)+(2*3)+(1*2)=110
110 % 10 = 0
So 218152-32-0 is a valid CAS Registry Number.

218152-32-0Relevant articles and documents

A convenient synthesis of racemic 2'-deoxy carbocyclic thymidines lacking the 5'-methylene group

Zhou, Jinglan,Shevlin, Philip B.

, p. 8373 - 8376 (1998)

A convenient synthesis of racemic 2'-deoxy carbocyclic thymidines lacking the 5'-methylene group is reported. Thus, appropriately protected nucleic acid bases are coupled to 3-cyclopentenol, 1, via the Mitsunobu reaction. Epoxidation of the protected thymine substituted cyclopentene gives the corresponding syn and anti-epoxides in a 4:1 ratio. Ring opening of the syn-epoxide by a variety of nucleophiles leads to the racemic 2'-deoxy carbocyclic thymidines lacking the 5'-methylene group.

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