Facile assembly of 1-(4-haloisoquinolin-1-yl)ureas via a reaction of 2-alkynylbenzaldoxime, carbodiimide, and halide in water
摘要:
1-(4-Haloisoquinolin-1-yl)ureas are generated efficiently via a tandem reaction of 2-allcynylbenzal doxime, carbodiimide, with halide in water. The process involves the generation of halonium ion in situ by employment of Nal/oxone or NaBr/oxone as the promoters. This green process proceeds smoothly and efficiently, accommodating a variety of substituents to generate the desired products. (c) 2014 Elsevier Ltd. All rights reserved.
Access to Functionalized Isoquinoline<i>N</i>-Oxides<i>via</i>Sequential Electrophilic Cyclization/Cross-Coupling Reactions
作者:Qiuping Ding、Jie Wu
DOI:10.1002/adsc.200800301
日期:2008.8.4
Electrophiliccyclization of 2-alkynylbenzaldoximes with various electrophiles leads to the formation of 4-iodoisoquinoline N-oxides or 4-bromoisoquinoline N-oxides under mild conditions. The reaction can be transferred to highly functionalized isoquinoline N-oxides via palladium-catalyzed cross-couplingreactions.