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690666-83-2

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690666-83-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 690666-83-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,0,6,6 and 6 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 690666-83:
(8*6)+(7*9)+(6*0)+(5*6)+(4*6)+(3*6)+(2*8)+(1*3)=202
202 % 10 = 2
So 690666-83-2 is a valid CAS Registry Number.

690666-83-2Relevant articles and documents

An Efficient Synthesis of 2,4-Disubstituted Quinolines by Electrophile-Mediated Cyclization Reactions of 2-Isocyanostyrene Derivatives

Kobayashi, Kazuhiro,Takagoshi, Kenichi,Kondo, Shizuka,Morikawa, Osamu,Konishi, Hisatoshi

, p. 553 - 559 (2007/10/03)

A novel quinoline synthesis starting with 2-isocyanostyrene derivatives is described. The treatment of 2-isocyanostyrene derivatives with aldehydes (or acetone) in the presence of a catalytic amount of diethyl ether-boron trifluoride afforded quinoline derivatives carrying a 1-hydroxyalkyl substituent at the 2-position. The use of acetaldehyde diethyl acetal or phenyloxirane as an electrophile under the same conditions gave the corresponding quinoline derivatives, carrying the 1-ethoxyethyl or 2-hydroxy-2-phenylethyl substituent at the 2-position, respectively. 2-Isocyanostyrene derivatives reacted with N,N-dimethyliminium salts without any catalyst to give 2-(1-dimethylaminoalkyl)quinolines.

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