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665033-45-4

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665033-45-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 665033-45-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,5,0,3 and 3 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 665033-45:
(8*6)+(7*6)+(6*5)+(5*0)+(4*3)+(3*3)+(2*4)+(1*5)=154
154 % 10 = 4
So 665033-45-4 is a valid CAS Registry Number.

665033-45-4Relevant articles and documents

Et2Zn-catalyzed intramolecular hydroamination of alkynyl sulfonamides and the related tandem cyclization/addition reaction

Yin, Yan,Ma, Wenying,Chai, Zhuo,Zhao, Gang

, p. 5731 - 5736 (2008/02/09)

(Chemical Equation Presented) Intramolecular hydroamination of alkynyl amides was effected by a catalytic amount of Et2Zn (20 mol %) to form indole derivatives, and a tandem cyclization/nucleophilic addition procedure involving reaction of the indole zinc salt intermediate with acid chlorides or halides was developed to provide an efficient approach to C3-substituted indole derivatives when an excess of Et2Zn (120 mol %) was used.

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