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189079-77-4

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189079-77-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 189079-77-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,0,7 and 9 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 189079-77:
(8*1)+(7*8)+(6*9)+(5*0)+(4*7)+(3*9)+(2*7)+(1*7)=194
194 % 10 = 4
So 189079-77-4 is a valid CAS Registry Number.

189079-77-4Relevant articles and documents

Synthesis of 3-halopyrroles

De Kimpe, Norbert,Tehrani, Kourosch Abbaspour,Stevens, Christian,De Cooman, Paul

, p. 3693 - 3706 (1997)

3-Chloro- and 3-bromo-2-arylpyrroles, which are potential physiologically active compounds in agrochemistry and pharmaceutical sciences, were efficiently prepared from the corresponding 2-aryl-1-pyrrolines by α,α-dihalogenation with N-halosuccinimides and

Hammett correlation of nornicotine analogues in the aqueous aldol reaction: Implications for green organocatalysis

Rogers, Claude J.,Dickerson, Tobin J.,Brogan, Andrew P.,Janda, Kim D.

, p. 3705 - 3708 (2007/10/03)

(Chemical Equation Presented) A series of meta- and para-substituted 2-arylpyrrolidines were synthesized and examined for their ability to catalyze an aqueous aldol reaction under buffered conditions. Kinetic analysis of arylpyrrolidine-catalyzed reactions displayed a linear Hammett correlation with ρ = 1.14 (R2 = 0.996), indicating that the reaction is accelerated by electron-withdrawing aryl rings. These results show promise for the development of a synthetically viable aqueous organocatalyst.

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