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134641-55-7

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134641-55-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134641-55-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,6,4 and 1 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 134641-55:
(8*1)+(7*3)+(6*4)+(5*6)+(4*4)+(3*1)+(2*5)+(1*5)=117
117 % 10 = 7
So 134641-55-7 is a valid CAS Registry Number.

134641-55-7Downstream Products

134641-55-7Relevant articles and documents

Cycloaddition Reactions of the Methanoannulene Derivative 9,9-Dichloro-1,4-dihydro-4a,8a-methanonaphthalene

Halton, Brian,Russell, Sarah G. G.

, p. 555 - 565 (2007/10/02)

9,9-Dichloro-1,4-dihydro-4a,8a-methanonaphthalene (4) adds the electron-deficient dienophiles 4-phenyl-1,2,4-triazoline-3,5-dione, maleic anhydride and dimethyl acetylenedicarboxylate to the α-face to give adducts (5)-(7) respectively; the addition of the alkyne requires Lewis acid catalysis.Inverse electron-demand addition of 3,6-diphenyl-1,2,4,5-tetrazine to the monoene component of (4) in hydrophilic solvent (ethane-1,2-diol) is thwarted; the CCl2 bridge is ejected and the 1,4-dihydronaphthalene formed is captured to give (ultimately) phthalazine (16).Dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate adds to (4) to give the methanobenzophthalazine (17b).

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