Synthesis of chiral N-protected α-amino aldehydes by reduction of N-protected N-carboxyanhydrides (UNCAs)
作者:Jean-Alain Fehrentz、Catherine Pothion、Jean-Christophe Califano、Albert Loffet、Jean Martinez
DOI:10.1016/0040-4039(94)88419-6
日期:1994.11
A facile one step synthesis of a wide variety of N-protected (Boc, Z, Fmoc) α-amino aldehydes under mild conditions is described. Pure N-protected (Boc, Z, Fmoc) α-amino aldehydes were obtained in high yields by reduction of N-protected (Z, Boc, Fmoc)-N-carboxyanhydrides (UNCAs) with equivalent amounts of lithium tris(tertbutoxy)aluminium hydride [LiAlH(O-t-Bu)3] or lithium tris[(3-ethyl-3-pentyl)oxy]aluminium
描述了在温和条件下容易地一步合成多种N-保护的(Boc,Z,Fmoc)α-氨基醛的方法。通过用等量的三(叔丁氧基)锂铝还原N-保护的(Z,Boc,Fmoc)-N-羧基酸酐(UNCA),可以高收率获得纯N-保护的(Boc,Z,Fmoc)α-氨基醛。氢化物[LiAlH(Ot-Bu)3 ]或氢化三[(3-乙基-3-戊基)氧基]氢化铝锂(LTEPA)作为溶剂。该反应简单,快速并且进行时没有可检测的外消旋作用。