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253453-31-5

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253453-31-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 253453-31-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,3,4,5 and 3 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 253453-31:
(8*2)+(7*5)+(6*3)+(5*4)+(4*5)+(3*3)+(2*3)+(1*1)=125
125 % 10 = 5
So 253453-31-5 is a valid CAS Registry Number.

253453-31-5Relevant articles and documents

Modified Pictet-Spengler reaction. A highly diastereoselective approach to 1,2,3-trisubstituted-1,2,3,4-tetrahydro-β-carbolines using perhydro-1,3-heterocycles

Singh, Kamaljit,Deb, Prasant K,Venugopalan

, p. 7939 - 7949 (2001)

A flexible variant of the Pictet-Spengler reaction employing oxazinanes as synthetic equivalents of several carbonyl compounds has been developed. Using acid catalyzed one pot condensation of perhydro-1,3-heterocycles various 1,3-disubstituted and 1,2,3-trisubstituted-1,2,3,4-tetrahydro-β-carbolines (THBCs) have been synthesized diastereoselectively.

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