An Iron(III) Catalyst with Unusually Broad Substrate Scope in Regioselective Alkylation of Diols and Polyols
作者:Bo Ren、Olof Ramström、Qiang Zhang、Jiantao Ge、Hai Dong
DOI:10.1002/chem.201504477
日期:2016.2.12
mechanism is proposed to proceed via a cyclic dioxolane‐type intermediate, formed between the iron(III) species and two adjacent hydroxyl groups. This approach represents the first transition‐metal catalysts that are able to replace stoichiometric amounts of organotin reagents in regioselective alkylation. The reactions generally lead to very high regioselectivities and high yields, on par with, or better
在这项研究中,[Fe(dibm)3 ](dibm = diisobutyrylmethane)被证明具有广泛的适用范围,可作为选择性地对包含1,2-和1,3--二醇的各种结构进行选择性单烷基化的催化剂。建议通过在铁(III)物种和两个相邻羟基之间形成的环状二氧戊环型中间体进行该机理的研究。这种方法代表了第一种能够在区域选择性烷基化反应中取代化学计量的有机锡试剂的过渡金属催化剂。该反应通常导致非常高的区域选择性和高产率,与先前用于区域选择性烷基化的方法相当或更好。