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7199-99-7

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7199-99-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 7199-99-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,1,9 and 9 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 7199-99:
(6*7)+(5*1)+(4*9)+(3*9)+(2*9)+(1*9)=137
137 % 10 = 7
So 7199-99-7 is a valid CAS Registry Number.

7199-99-7Relevant articles and documents

Strictly "pair"-selective and economical synthesis of conjugated diynes via Pd-catalyzed reaction of terminal alkynes with 1,1-dichloroethylene, elimination with LDA, and subsequent transformations

Qian, Mingxing,Negishi, Ei-Ichi

, p. 412 - 417 (2013/09/06)

Various unsymmetrically substituted conjugated diynes can be synthesized in a completely "pair"-selective manner via Pd-catalyzed reaction of terminal alkynes with 1,1-dichloroethylene in the presence of Pd(PPh3)4 followed by elimina

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