A method for preparing a compound having the following formula (I)
by reducing a nitro group of the following formula (III)
followed by carrying out an intramolecular dehydration condensation, wherein R
2
is hydrogen, alkyl, cycloalkyl, phenyl or a 5- or 6-membered heterocyclic, and X is oxygen, sulfur or nitrogen.
一种制备具有以下
化学式(I)的化合物的方法,包括还原以下
化学式(III)的硝基,然后进行分子内脱
水缩合反应,其中R2是氢、烷基、环烷基、苯基或5-或6-成员杂环基,X是氧、
硫或氮。