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74233-03-7

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74233-03-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74233-03-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,2,3 and 3 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 74233-03:
(7*7)+(6*4)+(5*2)+(4*3)+(3*3)+(2*0)+(1*3)=107
107 % 10 = 7
So 74233-03-7 is a valid CAS Registry Number.

74233-03-7Relevant articles and documents

Synthesis of Chiral Piperazines via Hydrogenation of Pyrazines Activated by Alkyl Halides

Huang, Wen-Xue,Liu, Lian-Jin,Wu, Bo,Feng, Guang-Shou,Wang, Baomin,Zhou, Yong-Gui

supporting information, p. 3082 - 3085 (2016/07/13)

A facile method has been developed for the synthesis of chiral piperazines through Ir-catalyzed hydrogenation of pyrazines activated by alkyl halides, giving a wide range of chiral piperazines including 3-substituted as well as 2,3- and 3,5-disubstituted

Synthesis of pyridines and pyrazines using an intramolecular hydroamination-based reaction sequence

Rizk, Toni,Bilodeau, Eric J.-F.,Beauchemin, Andre M.

supporting information; experimental part, p. 8325 - 8327 (2010/01/16)

A management issue! Various pyridines and pyrazines can be efficiently accessed from simple acyclic precursors using an intramolecular hydroamination/isomerization/aromatization sequence (see scheme). ρ-Toluenesulfonic acid (2 mol%) is used to catalyze this novel alkyne annulation, in which the oxime group allows for a subsequent redoxneutral aromatization step to occur.

Reactions of organolithium-diazine adducts and dihydrodiazines with electrophilic reagents

Stoel, R. E. van der,Plas, H. C. van der,Jongejan, H.,Hoeve, L.

, p. 234 - 238 (2007/10/02)

Some organolithium-diazine adducts and some dihydropyrimidines were treated with electrophilic reagents.Both 4,6-diphenyl-1(3)-lithio-1,4(3,4)-dihydropyrimidine and 4,6-diphenyl-1,4(3,4)-dihydropyrimidine were attacked by the electrophilic reagent methyl

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