A general and convenient method for the synthesis of 2,4-dinitrobenzyl ketones. Almost unlimited access to 2-substituted 6-nitroindoles from 2,4-dinitrotoluene and aldehydes
作者:Robert Bujok、Marcin Wiszniewski、Piotr Cmoch、Zbigniew Wróbel
DOI:10.1039/c7nj04919f
日期:——
presence of catalytic amounts of DBU with aldehydes to form the corresponding alcohols in good yields (usually above 65%). The obtained alcohols can be readily oxidized to 2,4-dinitrobenzyl ketones, which were used for the synthesis of 6-nitroindoles with various substituents in the 2-position. Starting from non-racemic aldehydes, non-racemic 2-substituted 6-nitroindoles were obtained.
2,4-二硝基甲苯在催化量的DBU与醛反应下以高收率(通常高于65%)形成相应的醇。所获得的醇可以容易地氧化成2,4-二硝基苄基酮,其用于合成在2-位具有各种取代基的6-硝基吲哚。从非外消旋醛开始,获得了非外消旋的2-取代的6-硝基吲哚。