本文描述了一种高效、便捷的2-三氟甲基苯并咪唑的合成方法。在 Cu 2 O 催化剂存在下,各种邻苯二胺与六氟乙酰丙酮的环化反应顺利进行,生成 2-三氟甲基苯并咪唑,收率令人满意(高达 >99%)。 CF 3源六氟乙酰丙酮不仅充当环化配偶体,而且充当Cu催化剂的配体。各种合成上有用的官能团,例如卤素原子、氰基和甲氧基羰基,在环化反应过程中保持完整。对该反应机理进行了彻底的研究,确定涉及七元环状二亚胺中间体。
PARASITICIDAL COMPOSITIONS COMPRISING BENZIMIDAZOLE DERIVATIVES, METHODS AND USES THEREOF
申请人:Boehringer Ingelheim Animal Health USA Inc.
公开号:EP3763706A1
公开(公告)日:2021-01-13
The invention relates to oral, topical or injectable compositions for combating liver fluke parasites in mammals, comprising at least one benzimidazole derivative active agent. The invention also provides for an improved method for eradicating and controlling liver fluke parasite infections and infestations in a mammal comprising administering the compositions of the invention to the mammal in need thereof.
Cu-catalyzed convenient synthesis of 2-trifluoromethyl benzimidazoles <i>via</i> cyclization of <i>o</i>-phenylenediamines with hexafluoroacetylacetone
作者:Xia Chen、Xiao-Yu Zhou、Hai-Long Liu、Sheng Zhang、Ming Bao
DOI:10.1039/d3ob01702h
日期:——
with hexafluoroacetylacetone proceeded smoothly in the presence of Cu2O as the catalyst to produce 2-trifluoromethyl benzimidazoles in satisfactory to excellent yields (up to >99% yield). The CF3 source, hexafluoroacetylacetone, acted not only as cyclization partner, but also acted as a ligand for the Cu catalyst. Various synthetically useful functional groups, such as halogen atoms, cyano, and methoxycarbonyl
本文描述了一种高效、便捷的2-三氟甲基苯并咪唑的合成方法。在 Cu 2 O 催化剂存在下,各种邻苯二胺与六氟乙酰丙酮的环化反应顺利进行,生成 2-三氟甲基苯并咪唑,收率令人满意(高达 >99%)。 CF 3源六氟乙酰丙酮不仅充当环化配偶体,而且充当Cu催化剂的配体。各种合成上有用的官能团,例如卤素原子、氰基和甲氧基羰基,在环化反应过程中保持完整。对该反应机理进行了彻底的研究,确定涉及七元环状二亚胺中间体。