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87434-76-2

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87434-76-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87434-76-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,4,3 and 4 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 87434-76:
(7*8)+(6*7)+(5*4)+(4*3)+(3*4)+(2*7)+(1*6)=162
162 % 10 = 2
So 87434-76-2 is a valid CAS Registry Number.

87434-76-2Downstream Products

87434-76-2Relevant articles and documents

New Efficient Total Syntheses of Derivatives of Protoporphyrin-IX Bearing Deuterated Methyl Groups

Smith, Kevin M.,Pandey, Ravindra K.

, p. 1383 - 1388 (2007/10/02)

New total syntheses of hemins which are regioselectively deuterated in the 1,5 (2), 5 (3) or 8 (4) methyl groups are described.Syntheses of hemins 2 and 3 follow the progression from pyrromethane 12 to t-butyl tripyrrene-carboxylate hydrobromide (17 and 30) and then to a,c-biladiene dihydrobromide (19 and 31), but for reasons of economy in use of labeled monopyrroles, the a,c-biladiene dihydrobromide 40 for hemin 4 is approached in an initially "clockwise" manner by synthesis of a benzyl tripyrrene-carboxylate hydrobromide 37 from the pyrromethane 5.Cyclization of the a,c-biladienes (19, 31, and 40) was accomplished by brief heating in dimethylformamide in the presence of copper(II) chloride.

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