实现高度非对映和对映选择性的直接C–H羟基化仍然是一个挑战性的目标。该反应主要受到所产生的醇的过度氧化的可能性以及低的立体选择性的阻碍。在本文中,我们介绍了在2,2,2-三氟乙醇中由锰配合物H 2 O 2和羧酸催化的对映选择性苄基C–H羟基化反应。苯甲醇具有出色的非对映选择性(高达> 95:5)和对映选择性(高达95%ee)。作为这项工作的重点,可以通过调整羧酸添加剂的量来实现C–H羟基化的非对映选择性。
Ketone Formation via Mild Nickel-Catalyzed Reductive Coupling of Alkyl Halides with Aryl Acid Chlorides
作者:Fan Wu、Wenbin Lu、Qun Qian、Qinghua Ren、Hegui Gong
DOI:10.1021/ol3011198
日期:2012.6.15
The present work highlights unprecedented Ni-catalyzed reductive coupling of unactivated alkyl iodides with aryl acid chlorides to efficiently generate alkyl arylketones under mild conditions.
Mild ketone formation via Ni-catalyzed reductive coupling of unactivated alkyl halides with acid anhydrides
作者:Hongyu Yin、Chenglong Zhao、Hengzhi You、Kunhua Lin、Hegui Gong
DOI:10.1039/c2cc33232a
日期:——
Ni-catalyzed ketone formation through mild reductive coupling of a diverse set of unactivated alkyl bromides and iodides with particularly aryl acidanhydrides was successfully developed using zinc as the terminal reductant. These conditions also allow direct coupling of alkyl iodides with aryl acids in the presence of Boc(2)O and MgCl(2).
Homologation of Ketones: Direct Transformation of Alkyl Ketones to Aryl Ketones via Photoredox Catalyzed Deacylation-Aroylation Sequence
作者:Tian Wang、Zengyu Zhang、Fan Gao、Xiaoyu Yan
DOI:10.1021/acs.orglett.4c02576
日期:2024.8.16
Ketones, as essential functional group skeletons, have garnered significant interest due to their diverse transformations. Herein, we describe a versatile photoredox catalyzed deacylation-aroylation strategy that enables the direct transformation of alkyl ketones to aryl ketones. This process involves photoredox deacylation of dihydroquinazolinones derived from alkyl ketones to generate alkyl radicals