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105787-50-6

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105787-50-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 105787-50-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,7,8 and 7 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 105787-50:
(8*1)+(7*0)+(6*5)+(5*7)+(4*8)+(3*7)+(2*5)+(1*0)=136
136 % 10 = 6
So 105787-50-6 is a valid CAS Registry Number.

105787-50-6Relevant 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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