Thermal decomposition of O-benzyl ketoximes; role of reverse radical disproportionation
作者:Jessie A. Blake、Keith U. Ingold、Shuqiong Lin、Peter Mulder、Derek A. Pratt、Brad Sheeller、John C. Walton
DOI:10.1039/b313491a
日期:——
9,10-dihydrophenanthrene and 9,10-dihydroanthracene than in tetralin. These results indicated that a reverse radical disproportionation reaction in which a hydrogen atom was transferred from the solvent to the oxime ether, followed by [small beta]-scission of the resultant aminoalkyl radical, must be important in the latter two solvents. Benzaldehyde was found to be an additional product from thermolyses
已在三个氢供体中研究了七个二烷基,两个烷基芳基和两个二芳基O-苄基酮肟醚R(1)R(2)C [双键,长度为m-破折号NOCH(2)Ph)的热解溶剂:四氢萘,9,10-二氢菲和9,10-二氢蒽。所有肟醚均给出了OC键(即,R(1)R(2)C [双键,长度为m-NOH和PhCH(3))均被裂解的预期产物,以及NO键(即,R(1)R(2)C [双键,长度为m-NH和PhCH(2)OH)。这些产物的产率取决于所使用的溶剂,并且在9,10-二氢菲和9,10-二氢蒽中的O-苄基肟醚的分解速率大于在四氢化萘中。这些结果表明,其中有一个氢原子从溶剂转移到肟醚上的逆自由基歧化反应,然后对所得的氨基烷基进行小β-断裂,在后两种溶剂中必须很重要。发现苯甲醛是在四氢化萘中进行热解的另一产物。该证据和其他证据表明,涉及一些苄基氢原子的另一种诱导的分解模式涉及提取苄基氢原子,然后对所得的苄基进行小β-断裂。通过比较不能产生烯胺互变异构体的双环[3