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.
Iodine-mediated electrophilic cyclization of 2-alkynylbenzaldoximes leading to the formation of iodoisoquinoline N-oxides
作者:Zhibao Huo、Hisamitsu Tomeba、Yoshinori Yamamoto
DOI:10.1016/j.tetlet.2008.07.061
日期:2008.9
Reaction of 2-alkynylbenzaldoximes 1 with 5 equiv of iodine in EtOH at room temperature gives the corresponding iodoisoquinoline N-oxides 2 in good to excellent yields. The cyclization proceeds very smoothly and quickly without any additives such as bases under very mild reaction conditions. (C) 2008 Elsevier Ltd. All rights reserved.
Facile assembly of 1-(4-haloisoquinolin-1-yl)ureas via a reaction of 2-alkynylbenzaldoxime, carbodiimide, and halide in water
作者:Lifang Lai、Huanhuan Wang、Jie Wu
DOI:10.1016/j.tet.2014.02.026
日期:2014.4
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.