Substituent effects on 2-aza-5-hexynyl radical cyclization regiochemistry
作者:Joong-Kwon Choi、David J. Hart、Yeun-Min Tsai
DOI:10.1016/s0040-4039(00)85708-1
日期:1982.1
Cyclizations of several N-acyl-2-aza-5-hexynyl radicals are described. The regiochemical course of these cyclizations depend on the nature of substituents at the alkyne terminus.
A Kulinkovich Entry into Tertiary <i>N</i>-Acyliminium Ion Chemistry
作者:Lourdes Ollero、Gertjan Mentink、Floris P. J. T. Rutjes、W. Nico Speckamp、Henk Hiemstra
DOI:10.1021/ol990866d
日期:1999.11.1
[GRAPHICS]Subjection of N-alkenylimides to Kulinkovich cyclopropanation conditions led to different types of N,O-acetals, which were used as precursors for tertiary N-acyliminium ion chemistry. In this way, a variety of bi- and tricyclic lactams were efficiently synthesized.
A novel annulation method for the synthesis of some nitrogen-containing heterocycles: The synthesis of (±)-heliotridane and (±)-nuphar indolizidine
作者:Takeshi Ohnuma、Masayasu Tabe、Keiko Shiiya、Yoshio Ban、Tadamasa Date