A convenient and efficient ring-opening reaction of aziridines with acetylenes and synthesis of dihydropyrroles
作者:Chang-Hua Ding、Li-Xin Dai、Xue-Long Hou
DOI:10.1016/j.tet.2005.07.076
日期:2005.10
In the presence of tBuOK, reaction of acetylenes with N-Ts substituted aziridines derived from both cyclic and acyclic alkenes at room temperature gave rise to homopropargylamines in good to high yields and in high regioselectivity. Not only Ph- and Me3Si-substituted acetylenes but also acetylene itself was suitable reagents. Treatment of ring-opening products with I2 and AgOAc in the presence of K2CO3
在t BuOK的存在下,乙炔与室温下衍生自环状和无环烯烃的N -Ts取代的氮丙啶反应以高至高收率和高区域选择性产生了高炔丙胺。合适的试剂不仅是Ph和Me 3 Si取代的乙炔,而且乙炔本身也是合适的试剂。在K 2 CO 3存在下用I 2和AgOAc处理开环产物以高产率提供了二氢吡咯。还可以通过在NaH存在下氮丙啶和苯乙炔的反应,然后用I 2和AgOAc处理,实现一锅合成二氢吡咯。