Synthesis of cinnamaldehydes, esters of cinnamic acids and acylals of cinnamaldehydes by oxidation of arylpropenes with 2,3-dicyano-5,6-dichlorobenzoquinone (DDQ)
作者:Tommy Iliefski、Shiming Li、Knut Lundquist
DOI:10.1016/s0040-4039(98)00213-5
日期:1998.4
3-arylpropenes give cinnamaldehydes (yield≈ 80%) on oxidation with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) in the presence of water. The conversion to aldehydes is promoted by electron-donating groups at the aromatic ring. On DDQ oxidation in the presence of methanol, methyl esters of cinnamic acids are the predominant products. DDQ oxidation of 1- or 3-(3,4-dimethoxyphenyl)-1-propene in the presence
1-芳基丙烯和3-芳基丙烯在水存在下与2,3-二氯-5,6-二氰基苯并醌(DDQ)氧化时生成肉桂醛(产率约80%)。芳香环上的给电子基团促进了向醛的转化。在甲醇存在下进行DDQ氧化时,肉桂酸的甲酯是主要产物。1-或3-(3,4-二甲氧基苯基)-1-丙烯在乙酸存在下的DDQ氧化可得到酰基[(E)-3-(3,4-二甲氧基苯基)-2-丙烯- 1,1-二醇]。