4-Isopropenyl-3-tosylmethyl pyrrolidines through radical cyclizations of 4-aza-1,6-dienes - an approach to kainic acids
作者:M.-P Bertrand、S Gastaldi、R Nouguier
DOI:10.1016/0040-4039(96)00006-8
日期:1996.2
The cyclofunctionalization of 4-aza-1,6-dienes 1 and 2 - bearing a prenyl chain - via the radical addition of PhSeTs (4) has been investigated as a potential route to 4-isopropenyl-3-tosylmethylpyrrolidines. Since the oxidative elimination of the resulting selenides afforded mainly the undesired olefinic regioisomer, an alternative pathway via the rearrangement of allylic sulfones 10–11, was applied
已经研究了通过PhSeTs(4)的自由基加成反应使带有氮杂烯基链的4-氮杂-1,6-二烯基1和2的环官能团化成为4-异丙烯基-3-甲苯磺酰基甲基吡咯烷酮的潜在途径。由于所得硒化物的氧化消除主要提供了不希望的烯烃区域异构体,因此采用了通过烯丙基砜10-11重排的替代途径,并以高收率提供了目标杂环。12 a,b是海藻酸的潜在前体。