Diazadioxadecalin and salen podands and macrocycles within dynamic combinatorial virtual libraries: structure, prototropy, complexation and enantioselective catalysis
作者:Alexander Star、Israel Goldberg、Benzion Fuchs
DOI:10.1016/s0022-328x(01)00882-8
日期:2001.7
which can be biased by complex formation with metal ions of different ionic radius. A rare instance of simultaneous occurrence of keto–enamine and phenol–imine tautomers in the solid state of 6 was unravelled (X-ray at two temperatures) and the strength of the intramolecular hydrogen bonding (and hence, the extent of ring closure) in 6 is temperature dependent. Compounds 6, 11 and 12–14 constitute
l-1,4-二氨基丁二醇(3)和d-2,3-二氨基丁二醇(4)与水杨醛的反应提供了l-1,4-双(水杨亚氨基)-2,3-丁二醇的互变异构歧管(5)和d-2,3-双(水杨亚氨基)-1,4-丁二醇(6)。水杨部分的O-烷基化稳定闭合dioxadiazadecalin(DODAD)和diazadioxadecalin(DADOD)异构体(7 “,8 ”),并相应地,所述二醛1,2-双(ø -formylphenoxy) -乙烷(9)导致了各自的大环歧管(10 – 10英寸和11 – 11”)。这些互变异构歧管是典型的目标驱动的动态组合虚拟文库,可通过与不同离子半径的金属离子形成复杂的结构而产生偏差。罕见的同时发生固态为6的酮-烯胺和酚亚胺互变异构体的情况(在两个温度下X射线)和分子内氢键的强度(因此,闭环的程度)被揭示。6与温度有关。化合物6,11和12 - 14构成了一类新的塞伦,它们形成重金