Pyrrolyl compounds of main group elements. Synthesis of group 14 5-metallated pyrrole-2-carbaldehydes
作者:Franck Denat、Hafida Gaspard-Iloughmane、Jacques Dubac
DOI:10.1016/0022-328x(92)83112-u
日期:1992.1
New group 14 5-metallated pyrrole-2-carbaldehydes 5-R3E(C4H2NR′)CHO (E Si, Ge, Sn; R Me, Et, nBu; R′ H, Me) have been regiospecifically prepared from corresponding pyrrole-2-carbaldehydes by either (i) 5-lithiation after protection of the aldehyde function by treatment with lithium N-methylpiperazide or by formation of an azafulvene dimer or (ii) metallation by R3EX (X Cl, Br). The 5-silylated
新的14族5金属化吡咯-2-甲醛5-R 3 E(C 4 H 2 NR')CHO(ESi,Ge,Sn; RMe,Et,n Bu; R'H,Me)已经由相应的吡咯-2-甲醛通过以下方式区域特异性地制备:(i)通过用N-甲基哌嗪锂处理或通过形成氮杂富勒二聚体来保护醛功能后的5-锂化或(ii)通过R 3 EX(X Cl,Br)。还从1-甲基-2,5-双(三甲基甲硅烷基)吡咯中获得了5-甲硅烷基化的化合物(E + Si,R-R'-Me)。