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55439-08-2

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55439-08-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 55439-08-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,4,3 and 9 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 55439-08:
(7*5)+(6*5)+(5*4)+(4*3)+(3*9)+(2*0)+(1*8)=132
132 % 10 = 2
So 55439-08-2 is a valid CAS Registry Number.

55439-08-2Relevant articles and documents

Dication Ethers, 12. - Reaction of Enaminones with Triflic Anhydride: 3-Trifloxypropeniminium- and Bis(3-amino-2-propenylio) Ether Salts

Singer, Berndt,Maas, Gerhard

, p. 485 - 496 (2007/10/02)

Reaction of enaminones 1 a-n with triflic anhydride (Tf2O) in a 1:1 molar ratio yields 3-trifloxypropeniminium triflates 2 a-n by O-sulfonylation.With a 2:1 molar ratio, the bis(3-amino-2-propenylio) ether bistriflates 3 are obtained.The configuration of the cations of 2 and 3 is derived from 1H and 13C NMR data as far as possible.Hydrolysis of the ambifunctional salts 3 may occur either at the iminium or the vinyl ether functions.

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