A Convenient Synthesis of 3-Alkyl-6-trifluoromethyl-3,6-dihydro-2<i>H</i>-1,3,4-thiadiazines
作者:Yasuhiro Kamitori、Masaru Hojo、Ryōichi Masuda、Yoshihiko Kawamura、Tōru Numai
DOI:10.1055/s-1990-26915
日期:——
3-Dialkylhydrazono-1,1,1-trifluoro-2-alkanones 2, readily obtainable from the reaction of substituted benzaldehyde, propanal and formaldehyde dialkylhydrazones with trifluoroacetic anhydride, afford title compounds 5 in satisfactory yields on treatment with Lawesson reagent in refluxing benzene.
3-二烷基肼基-1,1,1-三氟-2-烷酮 2,可通过取代苯甲醛、丙醛和甲醛二烷基肼与三氟乙酸酐的反应获得,在回流苯中用劳森试剂处理可获得标题化合物 5,收率令人满意。