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87519-61-7

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87519-61-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87519-61-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,5,1 and 9 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 87519-61:
(7*8)+(6*7)+(5*5)+(4*1)+(3*9)+(2*6)+(1*1)=167
167 % 10 = 7
So 87519-61-7 is a valid CAS Registry Number.

87519-61-7Relevant articles and documents

Silica-supported polyphosphoric acid in the synthesis of 4-substituted tetrahydroisoquinoline derivatives

Manolov, Stanimir,Nikolova, Stoyanka,Ivanov, Iliyan

, p. 1869 - 1880 (2013/04/10)

We report herein an application of an α-amidoalkylation reaction, as an alternative efficient synthesis of 4-aryl- and 4-methyl-1,2,3,4- tetrahydroisoquinoline derivatives. The amides required for this purpose would result from reaction of aminoacetaldehyde dimethylacetal with different substituted benzenes in polyphosphoric acid, followed by acylation of the obtained amines with different acid chlorides or sulfochlorides. We compared the cyclisation step using conventional (milieu of acetictrifluoracetic acid = 4:1) and solid supported reagents (SiO2/PPA), as recovered, regenerated and reused without loss of its activity catalyst. We found that in comparison to conventional methods, the yields of the reaction are greater and the reaction time is shorter.

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