A new, high-yield synthesis of 3-aryl-1,2,4-triazoles
作者:Antonio Guirado、Libertad López-Caracena、José I. López-Sánchez、José Sandoval、María Vera、Delia Bautista、Jesús Gálvez
DOI:10.1016/j.tet.2016.10.045
日期:2016.12
A convenient new synthetic approach to 3-aryl-1,2,4-triazoles has been developed. Chloralamides were obtained by high yield reactions between benzamides and chloral hydrate. These reacted with a phosphoruspentachloride/phosphorus oxychloride mixture undergoing a near quantitative conversion to N-(1,2,2,2-tetrachloroethyl)benzimidoyl chlorides, which were treated with hydrazine hydrate to directly
Compounds of formula I:
1
are useful in treating diseases prevented by or ameliorated with potassium channel openers. Also disclosed are potassium channel opening compositions and a method of opening potassium channels in a mammal.
Synthesis of Novel 3‐Aryl‐5‐dichloromethyl‐Δ
<sup>2</sup>
‐1,2,4‐oxadiazolines
作者:Antonio Guirado、José A. Sandoval、Enrique Alarcón、María Vera、Delia Bautista、Jesús Gálvez
DOI:10.1002/jhet.3558
日期:2019.6
The first synthetic approach to hitherto unknown 3‐aryl‐5‐dichloromethyl‐Δ2‐1,2,4‐oxadiazolines, of synthetic and biological interest, has been developed involving high‐yield reactions between N‐(2,2‐dichlorovinyl)benzimidoyl chlorides and hydroxylamine. The molecular structure of one member of this new family of compounds—5‐dichloromethyl‐3‐(4‐fluorophenyl)‐1,2,4‐oxadiazoline—has been determined by