Studies on Isothiazoles. III. A Novel Ring Closure to Isothiazoles by the Reaction of α-Amino Ketones with Thionyl Chloride or Sulfur Monochloride
作者:Takayuki Naito、Susumu Nakagawa、Jun Okumura、Kiyoshi Takahashi、Ken-ichi Kasai
DOI:10.1246/bcsj.41.959
日期:1968.4
New compounds, 4-hydroxyisothiazoles, have been prepared by the reaction of α-amino ketones with thionyl chloride or sulfur monochloride, which is a novel procedure for cyclization to an isothiazole ring. Polar solvents, especially dimethylformamide (DMF), were preferable for this cyclization. The reaction hardly proceeded in a nonpolar solvent such as benzene, but was accelerated by an addition of
通过α-氨基酮与亚硫酰氯或一氯化硫反应制备了新化合物4-羟基异噻唑,这是一种环化成异噻唑环的新方法。极性溶剂,尤其是二甲基甲酰胺 (DMF),对于这种环化反应是优选的。该反应在苯等非极性溶剂中几乎不进行,但通过加入少量 DMF 可加速反应。