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1194821-23-2

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1194821-23-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1194821-23-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,9,4,8,2 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1194821-23:
(9*1)+(8*1)+(7*9)+(6*4)+(5*8)+(4*2)+(3*1)+(2*2)+(1*3)=162
162 % 10 = 2
So 1194821-23-2 is a valid CAS Registry Number.

1194821-23-2Relevant articles and documents

Friedel-crafts chemistry. Part 39. unprecedented facile route to the synthesis of benzo[b][1]benzazepines via intramolecular friedel-crafts cyclialkylations

El-Aal, Hassan A. K. Abd,Khalaf, Ali A.

, p. 635 - 645 (2013/07/26)

A series of six pharmaceutically promising 5,6-dihydro-11H-benzo[b][1] benzazepine derivatives (1c-h) were cleanly prepared by Friedel-Crafts cyclialkylations of nitrogen-containing alkanols in the presence of AlCl3, 85% H2SO4 or polyphosphoric acid catalysts. The precursor alkanols (13a-f) were readily prepared by reaction of two synthesized carboxylic acid esters (12a, b) with different Grignard reagents. Also, two dibenzo[b,f]azepinones (15a, b) were prepared by Friedel-Crafts cycliacylation and reduced to the corresponding 5,6-dihydro-11H-benzo[b][1]benzazepines (1a, b). Overall, this approach allows easy and efficient access to polytricyclic amines from easily synthesized alkanols or cycloketones. A plausible carbocation mechanism is proposed to account for the results.

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