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19937-33-8

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19937-33-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19937-33-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,9,3 and 7 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 19937-33:
(7*1)+(6*9)+(5*9)+(4*3)+(3*7)+(2*3)+(1*3)=148
148 % 10 = 8
So 19937-33-8 is a valid CAS Registry Number.

19937-33-8Relevant articles and documents

PhICl2 and wet DMF: An efficient system for regioselective chloroformyloxylation/a-chlorination of alkenes/a,β-unsaturated compounds

Liu, Le,Zhang-Negrerie, Daisy,Du, Yunfei,Zhao, Kang

supporting information, p. 436 - 439 (2014/04/03)

PhICl2 in wet DMF was found to form an efficient system for realizing difunctionalization of various alkenes and olefinic derivatives possessing a wide range of functional groups. This novel methodology provides convenient access to either regioselective chloroformyloxylated products or a-chlorinated olefinic products, depending on the type of structure of the original unsaturated starting material. The mechanism of the reaction is proposed and discussed.

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