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155405-68-8

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155405-68-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 155405-68-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,4,0 and 5 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 155405-68:
(8*1)+(7*5)+(6*5)+(5*4)+(4*0)+(3*5)+(2*6)+(1*8)=128
128 % 10 = 8
So 155405-68-8 is a valid CAS Registry Number.

155405-68-8Relevant articles and documents

Synthesis of 5H-pyrido[2,3-c]-2-benzazepines

Troschutz,Grun

, p. 225 - 231 (2007/10/02)

The title compounds can be obtained by two different ways: Ring closure of 2-benzazepine enaminonitrile 1 and the C2-building blocks 2, 7 and 8 gives rise to the title compounds 6, 9 and 10. - The second way starts with Wolff-Kishner-reduction of the 2-amino-3-benzoylpyridines 16a,b to the 2-amino-3-benzylpyridines 18a,b. Benzoylation of 18a,b leads to the dibenzoylated compounds 20 and 21, respectively, which can be transformed to the monobenzoylated pyridines 22 resp. 23. Applying the Bischler-Napieralski-reaction on 22a,b and 23a,b leads to the 5H-pyrido[2,3-c]-2-benzazepines 24a,b and 25a,b. By means of 1H-, 13C- and 15N-NMR-data it is demonstrated that ethyl benzoylcyanacetimidate (12a) exists as benzoylketene-O,N-acetal 12a AE.

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