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140839-07-2

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140839-07-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 140839-07-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,0,8,3 and 9 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 140839-07:
(8*1)+(7*4)+(6*0)+(5*8)+(4*3)+(3*9)+(2*0)+(1*7)=122
122 % 10 = 2
So 140839-07-2 is a valid CAS Registry Number.

140839-07-2Downstream Products

140839-07-2Relevant articles and documents

A new access to phosphaindolizines by [3+2] cycloaddition of azomethine ylides onto phosphaalkynes

Bergstraesser, Uwe,Hoffmann, Andreas,Regitz, Manfred

, p. 1049 - 1052 (2007/10/02)

Azomethine ylides such as 1 and 4 in which the nitrogen atom is incorporated in a six-membered heterocyclic ring undergo regiospecific [3+2] cycloadditions with the phosphaalkynes 2a and b at 130-140 °C to furnish the phosphaindolizines 3 and 5a-c after elimination of ethyl formate or hydrogen cyanide, respectively. In contrast, dipoles of the type 6 react unspecifically with the phosphaalkyne 2a to yield the regioisomers 7 and 8.

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