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16642-50-5

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16642-50-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16642-50-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,6,4 and 2 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 16642-50:
(7*1)+(6*6)+(5*6)+(4*4)+(3*2)+(2*5)+(1*0)=105
105 % 10 = 5
So 16642-50-5 is a valid CAS Registry Number.

16642-50-5Upstream product

16642-50-5Relevant articles and documents

A mild synthesis of vinyl halides and gem-dihalides using triphenyl phosphite-halogen-based reagents

Spaggiari, Alberto,Vaccari, Daniele,Davoli, Paolo,Torre, Giovanni,Prati, Fabio

, p. 2216 - 2219 (2007/10/03)

A new application of (PhO)3P-halogen-based reagents to the synthesis of vinyl halides and gem-dihalides is described. Vinyl halides were prepared in good to excellent yields from enolizable ketones, whereas aldehydes afforded the corresponding gem-dihalides. The halogenation proceeded smoothly under mild conditions.

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