Process for the preparation of aromatic thiocarboxylic acid amides
申请人:Hoechst Aktiengesellschaft
公开号:US04008264A1
公开(公告)日:1977-02-15
Aromatic thiocarboxylic acid amides are prepared by reaction of aromatic hydrocarbons with hydrogen thiocyanate or a salt of thiocyanic acid in at least 90% hydrofluoric acid. The reaction can be carried out in one single operation without the use of a Lewis acid or another catalyst. The thiocarboxylic acid amides obtained are known from the literature and serve as preliminary products for the preparation of nitriles, amides, carboxylic acids, heterocyclic compounds and the manufacture of plant protecting agents and pharmaceuticals.
3-Bromocyclohexane-1,2-dione as a useful reagent for Hantzsch synthesis of thiazoles and the synthesis of related heterocycles
作者:Jason M. Guernon、Yong-Jin Wu
DOI:10.1016/j.tetlet.2011.05.028
日期:2011.7
We describe the use of 3-bromocyclohexane-1,2-dione, an air stable, versatile reagent for the Hantzsch thiazole synthesis and the synthesis of other closely related heterocycles.
A gold‐carbon nanotube nanohybrid was shown to act as an efficient heterogeneous catalyst in the smooth and selective conversion of thioamides to the corresponding nitriles. The reaction was performed under mild conditions (room temperature, atmospheric pressure of oxygen) using only a gold loading of 0.35 mol %. Substituted aromatic or aliphatic nitriles were produced in very good to excellent yields