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1393345-83-9

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1393345-83-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1393345-83-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,9,3,3,4 and 5 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1393345-83:
(9*1)+(8*3)+(7*9)+(6*3)+(5*3)+(4*4)+(3*5)+(2*8)+(1*3)=179
179 % 10 = 9
So 1393345-83-9 is a valid CAS Registry Number.

1393345-83-9Relevant academic research and scientific papers

An acid-promoted novel skeletal rearrangement initiated by intramolecular ipso-Friedel-Crafts-type addition to 3-alkylidene indolenium cations

Yokosaka, Takuya,Nemoto, Tetsuhiro,Hamada, Yasumasa

, p. 5431 - 5433 (2012/07/03)

An acid-promoted novel skeletal rearrangement is described. Using trifluoroacetic acid as the acid promoter, an intramolecular ipso-Friedel-Crafts-type addition of phenols to 3-alkylidene indolenium cations, formation of iminium cations through rearomatization of the spirocyclohexadienone units, and intramolecular Pictet-Spengler reaction proceeded sequentially, producing tricyclic indole derivatives.

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