Condensation of alkyl allyl (and 3-methyl-3-butenyl) phosphorochloridates with dialkyl phosphates gave trialkyl allyl (and 3-methyl-3-butenyl) pyrophosphates. Reactions of crotyl (2-butenyl) pyrophosphates with various nucleophiles such as phenolic ethers, aromatic amines, and nitrogen-containing heterocycles in the presence of boron trifluoride etherate gave good to moderate yields of crotylated products. The
Ruthenium-catalyzed C–H allylation of arenes with allylic amines
作者:Rui Yan、Zhong-Xia Wang
DOI:10.1039/c8ob00723c
日期:——
Ru-catalyzed pyridyl-directed C–H allylation of arenes with allylicamines has been developed. This reaction was carried out in the presence of 5 mol% of [Ru(p-cymene)Cl2]2 and 0.5 equiv. of AgOAc in CF3CH2OH at 75 °C, affording the allylated products of arenes in moderate to excellent yields. The method exhibits a wide scope of allylicamines and arenes and shows a good compatibility of functional groups
A highly efficient and regioselective allylation reaction of amines and active methylene compounds directly using allylicalcohols under mild conditions catalyzed by the novel cubane-type sulfido [(Cp*Mo)3(μ3-S)4Pd(η3-allyl)][PF6]2 clusters has been developed. A variety of allylicalcohols and nucleophiles including amines and active methylene compounds are investigated, and in the case of allylic alcohols
A highly efficient and regioselective allylation reaction of amines with allylicalcohols under mild conditions catalyzed by the cubane-type sulfido cluster [(Cp∗Mo)3S4Pd(dba)][PF6] with H3BO3 as an additive has been developed. A variety of amines and allylicalcohols are investigated, and in the case of allylicalcohols bearing substituents at either α- or γ-position only linear allylic amination
与由立方烷型硫代簇[(CP * Mo)的催化的温和的条件下烯丙醇胺的高效和区域选择性烯丙基化反应3小号4的Pd(DBA)] [PF 6 ]用H 3 BO 3作为添加剂的具有已开发。研究了多种胺和烯丙基醇,并且在α-或γ-位带有取代基的烯丙基醇的情况下,仅获得线性烯丙基胺化产物。
Low-Temperature <i>N</i>-Allylation of Allylic Alcohols via Synergistic Pd/Cu Catalysis: A Silica-Supported Dual-Metal-Complex Strategy
selectivity toward mono- and disubstituted products. The coimmobilization of a Cu complex increased the turnover number of the Pd complex 5.3 times, which was much higher than those of reported heterogeneous catalysts used at reaction temperatures higher than 100 °C. A wide substrate scope, recyclability, and suppression of aggregation and leaching were also confirmed. Whereas synergy was scarcely observed
N-烯丙基化是精细化学合成中构建C-N键的重要方法。在同一载体表面上积累催化活性物质是实现高催化效率的有前途的方法。在这项研究中,我们开发了一种包含固定在二氧化硅表面上的 Pd 和 Cu 络合物的催化剂。双金属配合物催化剂在30°C的低温下使用烯丙醇催化苯胺的N-烯丙基化,并且对单取代和双取代产物具有可调的选择性。 Cu络合物的共固定化使Pd络合物的周转数提高了5.3倍,远高于报道的在高于100℃的反应温度下使用的多相催化剂。还证实了广泛的底物范围、可回收性以及对聚集和浸出的抑制。虽然对于均相 Pd 和 Cu 配合物的简单混合物几乎没有观察到协同作用,但双配合物催化剂表现出显着的协同作用,表明固体表面上的协同催化。光谱分析(包括 XAFS、原位红外和 DNP 增强15 N NMR)以及密度泛函理论计算表明,苯胺分子被 Cu 配合物激活,从而对 π-烯丙基钯中间体进行有效的亲核攻击。