Synthesis of Amino-1,4-benzoquinones and Their Use in Diels–Alder Approaches to the Aminonaphthoquinone Antibiotics
作者:Christopher C. Nawrat、William Lewis、Christopher J. Moody
DOI:10.1021/jo201320g
日期:2011.10.7
A new protocol for the synthesis of protected amino-1,4-benzoquinones by oxidation of the corresponding 2,5-dimethoxyaniline derivatives using PhI(OAc)2 or PhI(OCOCF3)2 in water containing 2.5% methanol is reported. The process represents an improvement over previously reported methods, both in terms of yield and number of steps, and in the range of nitrogen protecting groups that it tolerates. A number
报道了一种新的方案,该方案通过在含有2.5%甲醇的水中使用PhI(OAc)2或PhI(OCOCF 3)2氧化相应的2,5-二甲氧基苯胺衍生物来合成受保护的氨基1,,4-苯醌。该方法相对于先前报道的方法而言,在产率和步骤数量上以及在其可容忍的氮保护基团的范围上都代表了一种改进。制备了许多新颖的氨基苯醌,随后将其用作Diels-Alder反应中的亲双烯体,以形成合成氨基萘醌抗生素(如salinisporamycin)的结构单元。