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198978-46-0

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198978-46-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 198978-46-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,8,9,7 and 8 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 198978-46:
(8*1)+(7*9)+(6*8)+(5*9)+(4*7)+(3*8)+(2*4)+(1*6)=230
230 % 10 = 0
So 198978-46-0 is a valid CAS Registry Number.

198978-46-0Relevant articles and documents

Noncompetitive NMDA Antagonists: A novel synthesis of 1-phenyltetrahydro-3-benzazepines

Wuensch, Bernhard,Nerdinger, Sven,Bauschke, Gerd,Hoefner, Georg

, p. 211 - 214 (2007/10/03)

The key step in the synthesis of the pharmacologically interesting l-phenyltetrahydro-3-benzazepine skeleton is the Michael addition of (2-lithiophenyl)acetaldehyde acetals, which are generated in situ upon treatment of the bromo acetals 5a,b with n-butyllithium, to β-nitrostyrene (6). The reductive ring closure of the nitro acetals 7a,b succeeded with zinc dust and hydrochloric acid to give the 3-benzazepines 11a,b in good yields. The unsubstituted 3-benzazepine 11a showed a considerable affinity for the phencyclidine binding site of the NMDA receptor (K(i) = 6.41 μM), whereas donor substituents in the aryl moiety (11b,c) reduce the affinity for the NMDA receptor.

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