<i>cis</i>-Dihydroxylation of Alkenes with Oxone Catalyzed by Iron Complexes of a Macrocyclic Tetraaza Ligand and Reaction Mechanism by ESI-MS Spectrometry and DFT Calculations
作者:Toby Wai-Shan Chow、Ella Lai-Ming Wong、Zhen Guo、Yungen Liu、Jie-Sheng Huang、Chi-Ming Che
DOI:10.1021/ja100967g
日期:2010.9.29
[Fe(III)(L-N(4)Me(2))Cl(2)](+) (1, L-N(4)Me(2) = N,N'-dimethyl-2,11-diaza[3.3](2,6)pyridinophane) is an active catalyst for cis-dihydroxylation of various types of alkenes with oxone at room temperature using limiting amounts of alkene substrates. In the presence of 0.7 or 3.5 mol % of 1, reactions of electron-rich alkenes, including cyclooctene, styrenes, and linear alkenes, with oxone (2 equiv) for
[Fe(III)(LN(4)Me(2))Cl(2)](+) (1, LN(4)Me(2) = N,N'-二甲基-2,11-二氮杂[3.3] (2,6)pyridinophane) 是一种活性催化剂,用于在室温下使用有限量的烯烃底物将各种类型的烯烃与 oxone 进行顺式二羟基化。在 0.7 或 3.5 mol % 的 1 存在下,富电子烯烃(包括环辛烯、苯乙烯和线性烯烃)与 oxone(2 当量)反应 5 分钟导致高达 >99% 的底物转化率并提供顺式二醇产品的产率高达 67%,顺式二醇/环氧化物摩尔比高达 16.8:1。对于缺电子烯烃,包括 α,β-不饱和酯和 α,β-不饱和酮,它们与 oxone(2 当量)在 1(3.5 mol%)催化下反应 5 分钟,得到顺式二醇,产率高达 99%高达 >99% 的底物转化率。肉桂酸甲酯 (9.7 g) 与 oxone (1 当量) 的大规模顺式二羟基化得到顺式二醇产物