2 and 3 were studied as catalysts in the fluorination of aromatic and aliphatic acyl chlorides in CH2Cl2, with 3 showing notably higher activities than 2. Subsequently, organic carbonates (dimethyl carbonate and propylene carbonate) were also employed as solvents, which led to shorter reaction times and to the broadening of the substrate scope to a variety of aliphatic halides. Comparative studies
新型 P-N
配体 1-((二苯基
磷烷基)甲基)-1 H-苯并-
1,2,3-三唑 ( 1 ) 已制备,基于苯并三唑支架。1与[CoCp*(CH 3 CN) 3 ][BF 4 ] 2和[CoCp*(I) 2 ] 2 (Cp* = 五
甲基环戊二烯基)反应得到螯合物[CoCp*(CH 3 CN)(P –N)][BF 4 ] 2 ( 2 ) 和 [CoCp*(I)(P–N)]I ( 3 ),分别。配合物2和3作为催化剂在 CH 2 Cl 2中芳族和脂族酰
氯的
氟化反应中进行了研究,其中3显示出明显高于2 的活性。随后,有机
碳酸酯(
碳酸二甲酯和
碳酸亚
丙酯)也被用作溶剂,这导致反应时间更短,底物范围扩大到各种脂肪族卤化物。3与类似络合物[CoCp*(I) 2 (PMePh 2)],其具有单齿
膦配体,表明在前者的情况下获得了更高的产率。进行了 DFT 计算和实验研究,以阐明反应机制,这需要形成
氟化
钴物质,