Title

Exploitation of Differential Reactivity of the Carbon-chlorine Bonds in 1,3-dichloroisoquinoline

Alternative Title

Routes to new N,N-chelate ligands and 1,3-disubstituted isoquinolines

Abstract

Under Pd(PPh3)4 catalysis, coupling of arylboronic acids to the 1-position of 1,3-dichloroisoquinoline takes place, leading exclusively to 1-aryl-3-chloroisoquinolines. This regiochemistry is demonstrated by the crystal structure of 3-chloro-1-(8-methoxy-1-naphthyl)isoquinoline. The 3-chloro group may be modified by nickel-catalysed reaction with Grignard reagents or direct nucleophilic displacement with LiSCH2Ph. Attempted lithiation of the 3-position is not successful (either deprotonation or complex reactivity results). Under zinc reduction in the presence of NiCl2-PPh3 and NaI, the 1-aryl-3-chloroisoquinolines furnish 3,3′-biisoquinolines in good yield.

Department(s)

Chemistry

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1997 Royal Society of Chemistry, All rights reserved.


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