通过活化的1',2,3,3',4,4'-六-O-甲基蔗糖与功能多样的D-甘露糖醇的反应制备了一系列五个新的具有蔗糖支架的大环杂种。含有甘露醇单元的21、25和31元代表是通过将6,6'-二-O-炔丙基蔗糖与受保护的1,6-二叠氮基-D-甘露醇或6,6'-di进行大环化制备的-叠氮蔗糖与炔丙基化的D-甘露醇(“点击”方法),而23位代表则通过1',2,3,3',4,4'-六-O-甲基-6的双N-烷基化制备1,6'-二氨基蔗糖与1,6-二溴酰基D-甘露醇。测试了所有蔗糖衍生物作为手性识别α-苯基乙铵(α-PEA)阳离子的假定宿主。在一种情况下,与我们先前报道的所有基于蔗糖的大环主体形成鲜明对比,观察到了R-对映体的意外反向偏好(K R / K S = 1.5)。
Synthesis of d-mannitol and l-iditol derivatives as monomers for the preparation of new regioregular AABB-type polyamides
作者:Manuel Mancera、Isaac Roffé、Manuel Rivas、Carmen Silva、Juan A. Galbis
DOI:10.1016/s0008-6215(02)00040-x
日期:2002.4
1,6-Diamino-1,6-dideoxy-2,3,4,5-tetra-O-methyl-D-mannitol (and its L-iditol analogue) suitable for their utilization as monomers in the preparation of linear polyamides are described. Regio- and stereoregular polyamides of the AABB-type have been prepared by the active ester polycondensation method from these C(2) symmetric monomers and suberic and dodecanedioic acids. The resulting polyamides were