2R)-(-)- cis -2- o -tolylcyclohexanol (II) yielded the same ketone, 2R-(+)- o -tolylcyclohexanone (III). The absolute configuration of III was established from ORD and CD measurements. This also established the absolute configuration of I and II. I and II have the same absolute configuration about C-2, but the signs of their Cotton effect in the aromatic region area opposite.
光学活性的反式和顺式-2-邻
甲苯基
环己醇是通过碱性
水解先前制备和分离的(-)-薄荷
氧基
乙酸酯而获得的。(1S,2R)-(+)-反式-(I)和(1R,2R)-(-)-顺-2-邻
甲苯基
环己醇(II)的
氧化产生相同的
酮2R-(+)-o -
甲苯基
环己酮(III)。III的绝对构型由ORD和CD测量确定。这也确定了I和II的绝对配置。I和II关于C-2具有相同的绝对构型,但是在芳族区域中它们的棉花效应的迹象相反。