Stereoselective synthesis of 2,5-disubstituted morpholines using a palladium-catalyzed hydroamination reaction
作者:Alicia McGhee、Brian M. Cochran、Torrey A. Stenmark、Forrest E. Michael
DOI:10.1039/c3cc44117b
日期:——
A palladium-catalyzed hydroamination reaction is the key step in a stereoselective synthesis of 2,5-disubstituted and 2,3,5-trisubsituted morpholines from carbamate-protected aziridines. Aziridines are selectively attacked at the more substituted position by unsaturated alcohol nucleophiles using Lewis acid catalysts. Palladium-catalyzed hydroamination of the resulting aminoalkenes gives morpholines
钯催化的加氢胺化反应是从氨基甲酸酯保护的氮丙啶立体选择性合成2,5-二取代和2,3,5-三取代吗啉的关键步骤。使用路易斯酸催化剂,不饱和醇亲核试剂选择性地在更取代的位置上攻击氮丙啶。所得氨基烯烃的钯催化加氢胺化反应可将吗啉作为单一非对映异构体以极佳的收率得到。