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1640122-69-5

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1640122-69-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1640122-69-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,0,1,2 and 2 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1640122-69:
(9*1)+(8*6)+(7*4)+(6*0)+(5*1)+(4*2)+(3*2)+(2*6)+(1*9)=125
125 % 10 = 5
So 1640122-69-5 is a valid CAS Registry Number.

1640122-69-5Downstream Products

1640122-69-5Relevant articles and documents

Triflic Acid as an Efficient Br?nsted Acid Promoter for the Umpolung of N-Ac Indoles in Hydroarylation Reactions

Nandi, Raj Kumar,Perez-Luna, Alejandro,Gori, Didier,Beaud, Rodolphe,Guillot, Régis,Kouklovsky, Cyrille,Gandon, Vincent,Vincent, Guillaume

, p. 161 - 172 (2017/11/23)

We report that triflic acid, a strong Br?nsted acid, is a very powerful alternative to FeCl3 to mediate the hydroarylation of N?Ac indoles, which delivers regioselectively 3-arylindolines, 3,3-spiroindolines or 2-arylindolines. Mechanistic explorations point towards the existence of a highly electrophilic intermediate by simultaneous activation of the acetyl and of the C2=C3 bond by protons. (Figure presented.).

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