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20689-97-8

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20689-97-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20689-97-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,6,8 and 9 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20689-97:
(7*2)+(6*0)+(5*6)+(4*8)+(3*9)+(2*9)+(1*7)=128
128 % 10 = 8
So 20689-97-8 is a valid CAS Registry Number.

20689-97-8Upstream product

20689-97-8Relevant articles and documents

N-nitrosation of secondary amines using supported perchloric acid on silica gel and stereoselectivity study of nitrosated products

Goudarziafshar, Hamid,Ghorbani-Choghamarani, Arash,Hadian, Laila

, p. 1272 - 1276 (2013)

N-Nitrosation of different types of secondary amines has been proceeded using supported perchloric acid on silica gel and sodiume nitrite under heterogeneous conditions. The operational system is simple and high pure products can be easily isolated with good to high yields.

Copper-Catalyzed aerobic intramolecular dehydrogenative cyclization of n,n-disubstituted hydrazones through C sp 3 -H functionalization

Zhang, Guangwu,Zhao, Yan,Ge, Haibo

supporting information, p. 2559 - 2563 (2013/04/10)

An aerobic activity: The title reaction proceeds through an oxidation/cyclization/aromatization sequence under an atmosphere of O 2 (see scheme; DBU=1,8-diazabicyclo[5.4.0]undec-7-ene, DCE=1,2-dichloroethane, DMS=dimethylsulfide). This coupling

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