Exploitation of differential reactivity of the carbon–chlorine bonds in 1,3-dichloroisoquinoline. Routes to new N,N-chelate ligands and 1,3-disubstituted isoquinolines
Exploitation of differential reactivity of the carbon–chlorine bonds in 1,3-dichloroisoquinoline. Routes to new N,N-chelate ligands and 1,3-disubstituted isoquinolines
The present invention relates to compounds useful as inhibitors of ion channels. The invention also provides pharmaceutically acceptable compositions comprising the compounds of the invention and methods of using the compositions in the treatment of various disorders.
The present invention relates to compounds useful as inhibitors of ion channels. The invention also provides pharmaceutically acceptable compositions comprising the compounds of the invention and methods of using the compositions in the treatment of various disorders.
Exploitation of differential reactivity of the carbon–chlorine bonds in 1,3-dichloroisoquinoline. Routes to new N,N-chelate ligands and 1,3-disubstituted isoquinolines
作者:Alan Ford、Ekkehard Sinn、Simon Woodward
DOI:10.1039/a605827b
日期:——
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
NiCl2âPPh3 and NaI, the
1-aryl-3-chloroisoquinolines furnish 3,3â²-biisoquinolines in good
yield.