Et<sub>3</sub>B-Induced Radical Addition of <i>N</i>,<i>N</i>-Dichlorosulfonamide to Alkenes and Pyrrolidine Formation via Radical Annulation
作者:Takayuki Tsuritani、Hiroshi Shinokubo、Koichiro Oshima
DOI:10.1021/jo034043k
日期:2003.4.1
A highly regioselective radical addition of N,N-dichlorobenzenesulfonamide (dichloramine-B) to 1-alkenes is achieved at -78 degrees C by the use of triethylborane as a radical initiator. The reaction of 1,3-dienes with N,N-dichlorosulfonamide in the presence of Et(3)B regioselectively provides N-chloro-N-allylamide derivatives. N-chloro-N-allylamides thus obtained react with a variety of alkenes to
通过使用三乙基硼烷作为自由基引发剂,在-78摄氏度下实现了N,N-二氯苯磺酰胺(dichloramine-B)的高度区域选择性自由基加成反应。在Et(3)B存在下1,3-二烯与N,N-二氯磺酰胺的反应选择性地提供了N-氯-N-烯丙基酰胺的衍生物。如此获得的N-氯-N-烯丙基酰胺与多种烯烃反应,以高收率提供吡咯烷衍生物。已经开发出N,N-二氯磺酰胺,1,3-二烯和烯烃之间的自由基环化反应。