Synthetic studies on the perhydropyrrolo[2,1-j]quinoline marine alkaloids lepadiformine and cylindricine C using a 2-azapentadienyl anion cycloaddition. Synthesis of 2,13-diepilepadiformine (or 2-epi-11-deoxycylindricine C)
作者:William H Pearson、Nancy S Barta、Jeff W Kampf
DOI:10.1016/s0040-4039(97)00632-1
日期:1997.5
Tin-lithium exchange of 13 with n-BuLi produced the 2-azapentadienyl anion 6 (R = CH3), which participated in a [π4s+π2s] cycloaddition reaction with phenyl vinyl sulfide to afford the spirocyclic pyrrolidine 14, which as coverted to 2,13-diepilepadiformine (or 2-epi-11-deoxycylindricine C) 17 by a sequence of steps involving oxidative cleavage of the propenyl side-chain, intramolecular reductive amination
锡-锂与n -BuLi的13交换产生了2-氮杂戊二烯基阴离子6(R = CH 3),后者与苯基乙烯基硫醚参与[π4s+π2s]环加成反应,得到螺环吡咯烷14,其被掩盖为通过一系列步骤,包括丙烯基侧链的氧化裂解,分子内还原胺化和脱硫,得到2,13-二乙哌啶二甲双胍(或2-epi-11-deoxycylindricine C)17。