An Efficient Synthesis of Rubin’s Aldehyde and its Precursor 1,3,5-Tribromo-2,4,6-tris(dichloromethyl)benzene
作者:Christoph Holst、Dieter Schollmeyer、Herbert Meier
DOI:10.1515/znb-2011-0911
日期:2011.9.1
intermediate 1,3,5-tribromo-2,4,6-tris(dichloromethyl)benzene (3) crystallizes from petroleum ether in its C3h structure. However, in CDCl3 solution it exists at room temperature in two isomeric forms: 3a (C3h) and 3b (Cs) (1:1.15).The intramolecular Br・・・Cldistances are much smaller than the sum of the van der Waals radii. Therefore, the exocyclic C-C bonds show a hindered rotation. Graphical Abstract An Efficient
2,4,6-Tribromobenzo-1,3,5-tricarboxaldehyde (4) 可以通过两个反应步骤从 1,3,5-tribromobenzo 有效地制备。中间体 1,3,5-三溴-2,4,6-三(二氯甲基)苯 (3) 从石油醚中以 C3h 结构结晶。然而,在CDCl3 溶液中,它在室温下以两种异构体形式存在:3a (C3h) 和3b (Cs) (1:1.15)。分子内Br・・・Cl 距离远小于范德华半径之和。因此,环外 CC 键显示受阻旋转。图形摘要 一种有效合成鲁宾醛及其前体 1,3,5-Tribromo-2,4,6-tris(dichloromethyl)benzo 的方法