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118671-20-8

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118671-20-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 118671-20-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,6,7 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 118671-20:
(8*1)+(7*1)+(6*8)+(5*6)+(4*7)+(3*1)+(2*2)+(1*0)=128
128 % 10 = 8
So 118671-20-8 is a valid CAS Registry Number.

118671-20-8Relevant articles and documents

Synihesis of 3-substituied indoles via a modified madeling reaction

Orlemans,Schreunder,Conti,Verboom,Reinhoudt

, p. 3817 - 3826 (1987)

Anilides 4a-c,e-k, lla-d in which the amide function is benzylated, or silylated and having different electron-withdrawing groups (EWG) at the methyl methyl in the ortho position of the amide function, cyclize under the influence of potassium tert-butoxide to the corresponding indole derivatives 5a-c,e-k and 9a-d, respectively, under these conditions the chloroacetamides 4d,n and 11e are converted into the tetrahydroquinolines 6a,b and 12, respectively. Treatment of chloroacetamide 4m with KOt-Bu gave, in addition to starting material, indole 5m, tetrahydroquinoline 6c and 2(1H)-quinolinone 7. When 3-indolecarbonitrile 5a is treated with sodium in liquid amnonia debenzylation takes place, while after catalytic hydrogenation with 5% Pd/C the corresponding 2,3-dirnethylindole 8 is formed.

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