Weakly Coordinating, Ketone-Directed Cp*Co(III)-Catalyzed C–H Allylation on Arenes and Indoles
作者:Md Raja Sk、Sourav Sekhar Bera、Modhu Sudan Maji
DOI:10.1021/acs.orglett.7b03440
日期:2018.1.5
regioselective monoallylation of arenes and indoles is reported using a stable and cost-effective high-valent cobalt(III)-catalyst to access several important molecular building blocks. The allylation proceeds smoothly with a variety of substrates in the presence of various electron-rich and -deficient substituents. The method was applied to the formal synthesis of an ancisheynine alkaloid, a highly conjugated
作者:Weiping Liu、Sven C. Richter、Yujiao Zhang、Lutz Ackermann
DOI:10.1002/anie.201601560
日期:2016.6.27
The first manganese(I)‐catalyzed C−H allylations with ample scope were achieved by carboxylate assistance. The highly selective C−H/C−O functionalizations proved viable with densely substituted allyl carbonates, and the organometallic C−H allylation strategy set the stage for expedient late‐stage diversification with excellent levels of positional selectivity.
通过羧酸盐的辅助作用,第一个锰(I)催化的CH烯丙基化作用范围很大。事实证明,高选择性的C / H / C-O功能化可用于稠密取代的碳酸烯丙酯,有机金属的C-H烯丙基化策略可为后期分散化提供有利的条件,并具有出色的位置选择性。
Carboxylic Acid Promoted, Redox‐Neutral Ru‐Catalyzed C−H Allylation of Aromatic Ketones
作者:Dattatraya H. Dethe、Nagabhushana C. Beeralingappa、Balu D. Dherange
DOI:10.1002/ejoc.202100717
日期:2021.9.7
ketone-directed C(sp2)−H allylation of aromatic ketones such as substituted acetophenones, 3-acetyl indoles, and chalcones was developed under redox-neutral conditions. 1-Adamantane carboxylic acid plays a crucial role in improving the reactivity of the [RuCl2(p-cymene)]2 catalyst at mild reaction temperatures. This method provides an access to various synthetically useful terminalolefin systems in moderate to good
Iridium-Catalyzed Direct C–H Allylation of Ketimines
作者:Takahiro Nishimura、Ryota Yabe、Yusuke Ebe
DOI:10.1055/a-1477-7059
日期:2021.9
Aromatic C–H allylation of N-sulfonyl ketimines with allyl alcohol or allyl phenyl ether as an allyl source is catalyzed by a cationic iridium complex. The presence of a catalytic amount of a pyridine derivative was found to be essential for the reaction. In contrast, direct C–H allylation of ketimines derived from benzophenone derivatives and p-methoxyaniline with allyl phenyl ether proceeded in the