detected. The lactonization of unsymmetrical diols containing two primary alcohols occurred with catalyst 1, but selectivity was low based on alcohol electronics and modest based on alcohol sterics. Evidence for a transfer dehydrogenation mechanism was found, and insight into the origin of selectivity in the lactonization of 1°/2° diols was obtained. Additionally, spectroscopic evidence for a trimethylamine-ligated
在使用
丙酮作为溶剂和氢受体的脱氢二醇内酯化反应中,探索了具有可变取代基的带有
环戊二烯酮配体的空气稳定的
羰基铁化合物。[2,5-(SiMe3)2-3,4-(
CH2)4(η4-C4C═O)] Fe(CO)3(2)和[[2,5-(SiMe3)2-3,4-( )4(η4-C4C═O)]发现2,5-(SiMe3)2-3,4-( )3(η4-C4C═O)] Fe(CO)3(2)活性最高,其中2选择性最高包含伯醇和仲醇的二醇的内酯化。已成功合成了包含五元,六元和七元环的内酯,并且未检测到
羧酸的过氧化。含有两种伯醇的不对称二醇的内酯化反应在催化剂1的作用下发生 但基于
酒精电子学的选择性较低,而基于
酒精立体位的选择性较低。发现了转移脱氢机理的证据,并且获得了对1°/ 2°二醇的内酯化中选择性的起源的见解。另外,发现在反应过程中在溶液中形成
三甲胺连接的
铁物质的光谱学证据。