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199684-23-6

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199684-23-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 199684-23-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,6,8 and 4 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 199684-23:
(8*1)+(7*9)+(6*9)+(5*6)+(4*8)+(3*4)+(2*2)+(1*3)=206
206 % 10 = 6
So 199684-23-6 is a valid CAS Registry Number.

199684-23-6Relevant articles and documents

Nucleophilic reactions in the pyrrole series: Displacement of halogen as a tool to functionalize the pyrrole nucleus

Cirrincione,Almerico,Passannanti,Diana,Mingoia

, p. 1169 - 1173 (1997)

Nucleophilic substitutions on halopyrroles by charged and neutral carbon, nitrogen, oxygen and sulfur nucleophiles are reported. Such reactions represent a valuable and versatile instrument to prepare a wide variety of functionalized pyrroles and to obtain building blocks for the synthesis of polycyclic systems.

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