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19968-51-5

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19968-51-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19968-51-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,9,6 and 8 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 19968-51:
(7*1)+(6*9)+(5*9)+(4*6)+(3*8)+(2*5)+(1*1)=165
165 % 10 = 5
So 19968-51-5 is a valid CAS Registry Number.

19968-51-5Downstream Products

19968-51-5Relevant articles and documents

Access to Thiazole via Copper-Catalyzed [3+1+1]-Type Condensation Reaction under Redox-Neutral Conditions

Tang, Xiaodong,Yang, Jidan,Zhu, Zhongzhi,Zheng, Meifang,Wu, Wanqing,Jiang, Huanfeng

, p. 11461 - 11466 (2016/11/28)

A new strategy for thiazoles via copper-catalyzed [3+1+1]-type condensation reaction from oximes, anhydrides and potassiumthiocyanate (KSCN) is developed herein. The transformation has good functional group tolerance and various thiazoles were formed smoothly in good to excellent yields under mild reaction conditions. This process involves copper-catalyzed N-O/C-S bond cleavages, activation of vinyl sp2 C-H bond, and C-S/C-N bond formations which are under redox-neutral conditions as well as operational simplicity.

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