conditions initially gives the imine as the kinetically controlled product. The imine undergoes a solid‐state rearrangement to the bicyclic tetrahydro‐1, 3‐oxazine. The kinetics of the rearrangement were followed by solid‐state CP/MAS 13C NMR spectroscopy over the temperature range 283–297 K and the reaction was shown to have an activation energy of 85.0 ± 14.7 kJ mol−1. The probable reaction mechanism is
顺式2-
氨基甲基
环己醇与
对硝基苯甲醛在温和条件下缩合,最初得到作为动力学控制产物的
亚胺。
亚胺发生固态重排成双环四氢-1, 3-恶嗪。在 283-297 K 的温度范围内对重排动力学进行了固态 CP/MAS 13C NMR 光谱分析,结果表明反应的活化能为 85.0 ± 14.7 kJ mol-1。讨论了可能的反应机理。