The Chemical Conversion of the Photo-dimer of 2-Acetyl-5-methyl-1,4-benzoquinone. The Determination of the Regiochemistry of the Dimer
作者:Yo Miyagi、Kazuhiro Maruyama、Sachiko Yoshimoto
DOI:10.1246/bcsj.53.2962
日期:1980.10
From the photo-dimer (2a) of 2-acetyl-5-methyl-1,4-benzoquinone, mono- and diacetyl derivatives and 2,6-dimethyl-1,4,5,8,9-pentaacetoxyphenanthrene (3) were prepared. 3 was oxidized to 2,6-dimethyl-1,4,5,8-tetraacetoxy-9,10-phenanthrenequinone (4). The acetoxyl groups of 4 were partly deuterated to assign their 1H NMR signals. A series of chemical conversions of 2a to 4 via 3 unambiguously clarified the regiochemistry of 2a.
从2-乙酰基-5-甲基-1,4-苯醌(2a)的光二聚体出发,制备了单乙酰和双乙酰衍生物以及2,6-二甲基-1,4,5,8,9-五乙酰氧基菲(3)。3被氧化成2,6-二甲基-1,4,5,8-四乙酰氧基-9,10-菲醌(4)。4中的乙酰氧基团部分氘代以指定其1H NMR信号。一系列从2a到4通过3的化学转换明确阐明了2a的区域化学。