Mild Rhodium(III)-Catalyzed C–H Allylation with 4-Vinyl-1,3-dioxolan-2-ones: Direct and Stereoselective Synthesis of (<i>E</i>)-Allylic Alcohols
作者:Shang-Shi Zhang、Jia-Qiang Wu、Ye-Xing Lao、Xu-Ge Liu、Yao Liu、Wen-Xin Lv、Dong-Hang Tan、Yao-Fu Zeng、Honggen Wang
DOI:10.1021/ol503229c
日期:2014.12.19
A rhodium(III)-catalyzed C–H direct allylation reaction with 4-vinyl-1,3-dioxolan-2-ones has been developed. The reaction provides a facile and stereoselective access to substituted-(E)-allylic alcohols under mild and redox-neutral reaction conditions. Olefinic C–H activation is applicable, giving multifunctionalized skipped dienes in good yields. Minimal double-bond migration was observed.
Manganese-catalyzed allylation via sequential C–H and C–C/C–Het bond activation
作者:Qingquan Lu、Felix J. R. Klauck、Frank Glorius
DOI:10.1039/c7sc00230k
日期:——
Manganese-catalyzed sequential C–H and C–C/C–Het bond activation to synthesize allylic alcohols, allylated arenes, functionalized cyclopentenes and skipped dienes is reported. This protocol can be readily scaled up and various coupling partners are applied in manganese catalysis for the first time. Moreover, manganese-catalyzed alkenyl C(sp2)–H activation is also shown. Complimentary to the standard
Cobalt(III)-Catalyzed C–C Coupling of Arenes with 7-Oxabenzonorbornadiene and 2-Vinyloxirane via C–H Activation
作者:Lingheng Kong、Songjie Yu、Guodong Tang、He Wang、Xukai Zhou、Xingwei Li
DOI:10.1021/acs.orglett.6b01806
日期:2016.8.5
Co(III)-catalyzed mildC–C couplings of arenes with strained rings such as 7-oxabenzonorbornadienes and 2-vinyloxirane have been realized. The transformation is proposed to undergo ortho C–Hactivation, olefin insertion, and subsequent β-oxygen elimination. A broad range of synthetically useful functional groups are compatible, thus providing a new entry to access diversely 2-functionalized indoles
Air-Stable Manganese(I)-Catalyzed C−H Activation for Decarboxylative C−H/C−O Cleavages in Water
作者:Hui Wang、Mélanie M. Lorion、Lutz Ackermann
DOI:10.1002/anie.201702193
日期:2017.5.22
The decarboxylative C−H/C−O functionalization was accomplished by air‐ and water‐tolerant manganese(I) catalysis. The versatile C−H allylation occurred by facile organometallic C−H metalation on indoles, arenes, aminoacids and synthetically meaningful aryl ketimines with ample substrate scope and high levels of chemo‐, site‐ and regio‐selectivity.
脱羧的C / H / O功能化是通过耐空气和耐水的锰(I)催化完成的。通用的CH烯丙基化反应是由吲哚,芳烃,氨基酸和合成上有意义的芳基酮亚胺在分子上容易进行有机金属CH的金属化而形成的,具有足够的底物范围和高水平的化学,位点和区域选择性。
Cobalt(III)-Catalyzed Fast and Solvent-Free C–H Allylation of Indoles Using Mechanochemistry
Mechanochemical conditions have been applied to a highly efficient cobalt(III)-catalyzed C–H bond activation for the first time. In a subsequent step to the olefin insertion and β-oxygen elimination, N-pyrimidinylindoles were allylated with vinylethylene carbonates in the absence of organic solvent under high-speed ball-milling condition. As the reaction afforded the desired products in up to 98% yields