Elusive ethynyl azides: trapping by 1,3-dipolar cycloaddition and decomposition to cyanocarbenes
作者:Klaus Banert、Manfred Hagedorn、Jens Wutke、Petra Ecorchard、Dieter Schaarschmidt、Heinrich Lang
DOI:10.1039/c0cc00079e
日期:——
Although they decompose rapidly to produce cyanocarbenes, ethynyl azides were generated from (chloroethynyl)arenes and trapped for the first time by 1,3-dipolar cycloaddition at cyclooctyne.
A Pd-Catalyzed Double Coupling Reaction to 4,5-Disubstituted Imidazole Alkynes
作者:Guncheol Kim、Sunwha Kang、Youngha Ryu、Gyochang Keum、Myung Joon Seo
DOI:10.1080/00397919908085793
日期:1999.2
Abstract A palladium-catalyzed double couplingreaction of 4,5-diiodoimidazoles 2, which were prepared by diiodination of imidazole, and terminal alkynes provided the corresponding imidazole diynes 3.