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52075-21-5

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52075-21-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 52075-21-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,0,7 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 52075-21:
(7*5)+(6*2)+(5*0)+(4*7)+(3*5)+(2*2)+(1*1)=95
95 % 10 = 5
So 52075-21-5 is a valid CAS Registry Number.

52075-21-5Relevant articles and documents

A convenient preparation of mono- or gem-di-halogenoalkanes from α-sulfonyl carbanions and halogenolithiocarbenoids.

Charreau, Philippe,Julia, Marc,Verpeaux, Jean-Noel

, p. 201 - 210 (1989)

Various α-sulfonyl carbanions have been shown to react at low temperature with di- or tri-halogenolithiocarbenoids, to give 1-mono- or 1,1-di-halogenoalkanes.Bromocarbenoids gave better results than their chloro-analogues.Reaction of dibromolithiomethane with α-lithiated sulfones gives a high yield of vinylic bromides, the stereochemistry of which is cleanly E.Evidence is presented that the carbenoid itself is responsible for the reaction, and is not first converted into the corresponding carbene.

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