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21370-56-9

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21370-56-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21370-56-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,3,7 and 0 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21370-56:
(7*2)+(6*1)+(5*3)+(4*7)+(3*0)+(2*5)+(1*6)=79
79 % 10 = 9
So 21370-56-9 is a valid CAS Registry Number.

21370-56-9Upstream product

21370-56-9Downstream Products

21370-56-9Relevant 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)

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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