Synthetic approaches to 5,7- and 5,8-dimethoxyquinoline. Sonochemical dehalogenation of substituted 2,4-dichloroquinolines. Use of the 2D COLOC spectrum for the NMR assignment of 5,8-dimethoxyquinoline
作者:A. G. Osborne、J. F. Warmsley
DOI:10.1007/bf00811090
日期:1994.12
Sonochemical dehalogenation of 2,4-dichloroquinoline is very facile. However, with 5,7-dimethoxy-2,4-dichloroquinoline the reaction proceeds stepwise to provide the title dimethoxyquinolines which cannot be prepared via the Skraup reaction. The C-13 NMR chemical shift assignments for 5,8-dimethoxyquinoline are presented. These were made by utilising the coupling connectivities from the bridgehead carbons in the 2D COLOC spectrum.