Chemoselective asymmetric synthesis of C-3a-(3-hydroxypropyl)tetrahydropyrrolo[2,3-b]indole and C-4a-(2-aminoethyl)-tetrahydropyrano[2,3-b]indole derivatives
作者:Sara Pellegrino、Francesca Clerici、Alessandro Contini、Samantha Leone、Tullio Pilati、Maria Luisa Gelmi
DOI:10.1016/j.tet.2009.01.004
日期:2009.3
The asymmetric synthesis of new tetrahydropyrrolo[2,3-b]indole 19 and tetrahydropyrano[2,3-b]indole 20 rings, substituted in position C-3a and C-4a with a hydroxy- and an amino functionalized chain, respectively, was performed starting from the racemic spiro[cyclohexane-1,3′-indoline]-2′,4-diones 7. The enantiopure spiro oxo-azepinoindolinone (+)-10, obtained from (±)-7 by the way of an asymmetric
新的四氢吡咯并[2,3- b ]吲哚19和四氢吡喃并[2,3- b ]吲哚20环的不对称合成,分别在C-3a和C-4a位被羟基和氨基官能化的链取代,从外消旋螺[环己烷-1,3'-二氢吲哚] -2',4-二酮7开始。制备了通过不对称扩环从(±)-7获得的对映体螺氧基-氮杂叠氮吲哚酮(+)- 10和通过水解10得到的氨基酸(+)- 14作为关键中间体用于合成对映纯化合物(-)- 19和(-)-20。由于氨基酸14是化学衍生物制备衍生物19和20的常用中间体,因此进行了实验和计算研究,以选择性地获得这些化合物并为其形成提供机理上的合理化。