Enantioselective Synthesis of 3-Azabicyclo[4.1.0]heptenes and 3-Azabicyclo[3.2.0]heptenes by Ir-Catalyzed Asymmetric Allylic Amination of<i>N</i>-Tosyl Propynylamine and Pt-Catalyzed Cycloisomerization
作者:Ji-Bao Xia、Wen-Bo Liu、Tian-Min Wang、Shu-Li You
DOI:10.1002/chem.201000467
日期:2010.6.11
Irresistible! Highly regio‐ and enantioselective Ir‐catalyzed allylic amination reactions of N‐tosyl propynylamines have been realized. The resulting N‐tosyl allylpropynylamines were transformed into highly enantioenriched 3‐azabicyclo[4.1.0]heptenes and 3‐azabicyclo[3.2.0]heptenes, respectively, in the presence of PtCl2 (see scheme; Ts=tosyl, cod=1,5‐cyclooctadiene, TBAF=tetrabutylammonium fluoride
不可抗拒!已经实现了N-甲苯磺酰基丙炔胺的高度区域和对映选择性的Ir催化的烯丙基胺化反应。在存在PtCl 2的情况下,分别将所得的N-甲苯磺酰基烯丙基丙炔胺分别转化为高度对映体富集的3-氮杂双环[4.1.0]庚烯和3-氮杂双环[3.2.0]庚烯(参见方案; Ts =甲苯磺酰基,cod = 1 ,5-环辛二烯,TBAF =氟化四丁基铵,TMS =三甲基甲硅烷基)。