Cas 128639-46-3,C20H21N3O2

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Check Digit Verification of cas no

The CAS Registry Mumber 128639-46-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,6,3 and 9 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 128639-46:
(8*1)+(7*2)+(6*8)+(5*6)+(4*3)+(3*9)+(2*4)+(1*6)=153
153 % 10 = 3
So 128639-46-3 is a valid CAS Registry Number.

128639-46-3Upstream product

128639-44-1 1-((3aS,4R,5S,8S,8aR)-9-Hydroxy-9-phenyl-1,2,3,3a,4,5,8,8a-octahydro-4,8-methano-azulen-5-yl)-4-methyl-[1,2,4]triazolidine-3,5-dione

128639-46-3Downstream Products

128639-47-4 C₁₇H₁₈N₂

128639-46-3Relevant academic research and scientific papers

METHOXY AS A REMOVABLE ACTIVATING GROUP IN THE TRIAZOLINEDIONE REARRANGEMENT ROUTE TO AZO COMPOUNDS

Dover, John,Sheridan, Robert S.

, p. 1961 - 1964 (1990)

A methoxy group dramatically increases the yield of stepwise homo-Diels-Alder additions of N-methyltriazolinedione to aromatic meta-photoadducts, and can conveniently be subsequently replaced by other substituents.

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128639-46-3

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