申请人:Dow AgroSciences LLC
公开号:EP0972774A2
公开(公告)日:2000-01-19
The invention relates to 2-benzylthio-8-amino[1,2,4]triazolo[1,5-a]pyridines and a process for the preparation thereof. These compounds can be used for the preparation of 2-benzylthio[1,2,4]triazolo[1,5-a]pyridine compounds, which are important intermediates in the preparation of N-aryl[1,2,4]triazolo[1,5-a]pyridines.
The reaction is generally carried out by combining one molar equivalent of a 2-benzylthio-8-chloro[1,2,4]triazolo[1,5-a]pyridine compound with at least 3 molar equivalents of stannous chloride, one molar equivalent of stannic chloride, and an excess of hydrogen chloride or at least one molar equivalent of the alcohol.
本发明涉及 2-苄硫基-8-氨基[1,2,4]三唑并[1,5-a]吡啶及其制备工艺。这些化合物可用于制备 2-苄硫基[1,2,4]三唑并[1,5-a]吡啶化合物,后者是制备 N-芳基[1,2,4]三唑并[1,5-a]吡啶的重要中间体。
该反应一般通过将 1 摩尔当量的 2-苄硫基-8-氯[1,2,4]三唑并[1,5-a]吡啶化合物与至少 3 摩尔当量的氯化亚锡、1 摩尔当量的氯化锡和过量的氯化氢或至少 1 摩尔当量的醇结合进行。