analyses of meso-2, rac-2a, rac-2b and 3 are reported. They showed strong intramolecular hydrogen bondings between the hydroxy group and the nitrogen atom. We have also found that the diastereomeric isomerization of meso-2 to rac-2 in CDCl3 solvent containing moisture occurred to result in the 55:45 equilibrium mixtures of the isomers and vice versa.
在具有分子内配位原子二
氯硅烷的
水解反应,dcisiloxane -1,3
-二醇,[(OH) ø - (CH 3)2 NCH 2 -C 6 H ^ 4 }为RSi] 2 O(R = CH 2 CH(1),C 6 H 5(2),o-(CH 3)2 NCH 2 C 6 H 4(3),Me(4))以高收率获得。meso - 2的晶体结构分析结果,外消旋-图2a,外消旋- 2B和3中报告。它们在羟基和氮原子之间显示出很强的分子内氢键。我们还发现,非对映异构的内消旋- 2到外消旋- 2在CDCl 3发生含溶剂的
水分导致的异构体和反之亦然的55:45平衡混合物。