showed the highest activity. The reactions proceeded well with 0.5 mol % of catalyst loading and 20 mol % of t-BuOK at 85 °C for 24 h. Furthermore, 3 was also used as a catalyst for the synthesis of primary alcohols via transfer hydrogenation of aldehydes and the synthesis of 1,2-disubstituted benzimidazoles and quinolines via acceptorless dehydrogenative condensations.
四种二齿
锰(I)配合物[(C 5 H 4 N-C 5 H 3 N-OH)Mn(CO)3 Br](1),[(C 9 H 6 N-C 5 H 3 N-OH)Mn(CO )3 Br](2),[(C 8 H 5 N 2 -C 5 H 3 N-OH)Mn(CO)3 Br](3)和[(C 8 H 5 N 2 -C 5 H 3 N-OCH 3)Mn(CO)3Br](4)被合成。测试了这些配合物作为酮转移氢化的催化剂,其中3种显示出最高的活性。在85℃下,在0.5mol%的催化剂负载量和20mol%的t- BuOK下,反应进行得很好,持续了24小时。此外,3还用作催化剂,用于通过醛的转移氢化合成伯醇,以及通过无受体的脱氢缩合反应合成1,2-二取代的
苯并咪唑和
喹啉。