For stereochemical investigation of their dehydrogenation, the enantiomers of the aminoalcohols 1, 2, and 3 were prepared from optically active sources, while the enantiomers of the diamines 8 and 9 were available by resolution of the racemates.T he pure antipodes of 1, 2, and 3 reacted with mercury(II)-EDTA by a twofold dehydrogenation via intermediate participation of the neighbouring alcoholic group to the optically active lactams 5, 6, and 7 under complete retention of configuration.In the same manner the diamines 8 and 9 generated by four electron withdrawal the cycloamidines 10 and 11.
为了对它们的脱氢进行立体化学研究,氨基醇1、2和3的对映体是从光学活性源制备而来的,而二胺8和9的对映体则通过分离外消旋体获得。化合物1、2和3的纯对映体通过邻近醇基的中间参与,通过汞(II)-EDTA的双重脱氢反应生成了光学活性内酰胺5、6和7,保持构型完全不变。同样地,通过四电子提取生成了环酰胺10和11的二胺8和9。