申请人:Commonwealth Scientific and Industrial Research Organization
公开号:US04038405A1
公开(公告)日:1977-07-26
3-Trihalomethyl-1,2,4-triazoles either unsubstituted or having substituents in the 4 and/or 5, 1 and/or 5, and 2 and/or 5 positions; and methods for their preparation. Some of the compounds show biological activity; others have acaricidal activity.
申请人:Commonwealth Scientific and Industrial Research Organization
公开号:US04049815A1
公开(公告)日:1977-09-20
3-Trihalomethyl-1,2,4-triazoles either unsubstituted or having substituents in the 4 and/or 5, 1 and/or 5, and 2 and/or 5 positions; and methods for their preparation. The compounds show biological activity; at least some have acaricidal activity.
A low cost FeCl3‐mediated cascade annulation of trifluoroacetimidoyl chlorides and hydrazides for the efficient synthesis of 5‐trifluoromethyl‐1,2,4‐triazoles has been developed. The transformation proceeds through a cascade base‐promoted intermolecular C−N bond formation and FeCl3‐mediated intramolecular dehydration sequence under mild conditions. The protocol exhibits many notable features and can