作者:Suchandra Chakraborty、Chandan Saha
DOI:10.1002/ejoc.201300467
日期:2013.9
nitrate (CAN)–SiO2-mediated oxidation of 2-methyl-2,3,4,9-tetrahydro-1H- carbazol-1-one afforded a carbazole-1,4-quinone derivative, 2-methyl-1H-carbazole-1,4(9H)-dione, the synthetic precusor, which on, which, on Thiele acetylation under newly developed HBF4 catalysis conditions, yielded 4-hydroxy-2-methyl-9H-carbazole-1,3-diyl diacetate. Finally, CAN-SiO2-mediated oxidative hydrolysis of the acetylation
卡马霉素 G 的简明全合成分五步完成。铈(IV)硝酸铵(CAN)-SiO2介导的2-甲基-2,3,4,9-四氢-1H-咔唑-1-酮氧化得到咔唑-1,4-醌衍生物,2-甲基-1H-咔唑-1,4(9H)-二酮,合成前体,在新开发的 HBF4 催化条件下,Thiele 乙酰化生成 4-羟基-2-甲基-9H-咔唑-1,3-双乙酸二酯。最后,CAN-SiO2 介导的乙酰化产物的氧化水解和 O-甲基化使用化学计量的重氮甲烷和随后的甲基锂的区域选择性亲核加成导致卡马霉素 G。