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19689-92-0

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19689-92-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19689-92-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,6,8 and 9 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 19689-92:
(7*1)+(6*9)+(5*6)+(4*8)+(3*9)+(2*9)+(1*2)=170
170 % 10 = 0
So 19689-92-0 is a valid CAS Registry Number.

19689-92-0Relevant articles and documents

Copper-Catalyzed Annulation of Oxime Acetates with α-Amino Acid Ester Derivatives: Synthesis of 3-Sulfonamido/Imino 4-Pyrrolin-2-ones

Miao, Chun-Bao,Zheng, An-Qi,Zhou, Li-Jin,Lyu, Xinyu,Yang, Hai-Tao

supporting information, p. 3381 - 3385 (2020/04/21)

A copper-catalyzed annulation of oxime acetates and α-amino acid ester derivatives for the easy preparation of 4-pyrrolin-2-ones bearing a 3-amino group has been developed. This process features the oxidation of amines with oxime esters as the internal oxidant to produce the active 1,3-dinucleophilic and 1,2-dielectrophilic species concurrently. The subsequent nucleophilic cyclization realizes the efficient construction of 4-pyrrolin-2-one derivatives.

Improvement of liquid crystal alignment using novel photo-activators

Lee, In-Hye,Shin, Dong-Myung

, p. 7207 - 7210 (2018/06/29)

Photo-activator is a kind of additive that can improve the anchoring energy by attacking some of the bonds of polyimide (PI). Photo-activators were synthesized from the reaction of cyclohexanone oxime with three different anhydrides, respectively. Each ac

Copper-catalyzed radical/radical cross-coupling of ketoxime carboxylates with 4-hydroxycoumarins: A novel synthesis of furo[3,2-c]-coumarins

He, Mingchuang,Yan, Zhaohua,Wang, Wangyang,Zhu, Fuyuan,Lin, Sen

supporting information, p. 3706 - 3712 (2018/09/12)

A novel and efficient strategy for the synthesis of furo[3,2-c]coumarins has been developed via copper-catalyzed radical/radical cross-coupling of ketoxime carboxylates with 4-hydroxycoumarins. This redox-neutral reaction allows smooth and selective synthesis of 2-substituted, 3-substituted, 2,3-disubstituted and 2,3-fused polycyclic furo[3,2-c]coumarins.

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