Development of photocatalytic aromatic substitution reactions by electron-transfer oxidation of benzene

在含2，3-二氯-5，6-二氰基对苯二酚(DDQ)、苯和水的氧饱和乙腈溶液中，苯在紫外光照射下被光催化氧化生成苯酚。在亚硝酸叔丁酯存在下，由2，3-二氯-5，6-二氰基对苯二酚还原为DDQ，光催化生成苯酚。在该催化条件下，苯的转化率为61%，苯酚的选择性为92%。

Photocatalytic oxygenation of benzene occurs in an oxygen-saturated acetonitrile solution containing 2,3-dichloro-5,6-dicyano-pbenzoquinone(DDQ), benzene and waterunder UV light irradiation to yield phenol. In the presence of tert-butyl nitrite, phenol was formed photocatalytically via recovery from 2,3-dichloro-5,6-dicyanohydroquinone to DDQ. The conversion of benzene as a reactant was 61% and selectivity of phenol formation was 92%under the catalytic conditions.