Cobalt-Catalyzed Allylation of Amides with Styrenes Using DMSO as Both the Solvent and the α-Methylene Source
作者:Xu Zhang、Zhi Zhou、Huiying Xu、Xuefeng Xu、Xiyong Yu、Wei Yi
DOI:10.1021/acs.orglett.9b02462
日期:2019.9.20
An efficient synthesis of privileged allylic amines has been developed via cobalt-catalyzed allylation of amides with styrenes, in which DMSO was used as both the solvent and the α-methylene source. This transformation features high yields, and selectivity for the (E)-isomer of the linear product. Through the experimental and computational investigations, a sequential K2S2O8-mediated oxidative cou
通过将酰胺与苯乙烯进行钴催化的烯丙基化反应,已经开发了一种有效的特权烯丙基胺的合成方法,其中DMSO既用作溶剂,又用作α-亚甲基源。该转化具有高收率和对线性产物的(E)-异构体的选择性。通过实验和计算研究,还推导了顺序的K 2 S 2 O 8介导的氧化偶联/钴辅助的区域选择性烯烃插入/β-H消除/烯烃解离/氢化物转移过程。
Reaction of aromatic amides with phenyl iodosylacetate: an oxidative rearrangement
作者:K. Swaminathan、N. Venkatasubramanian
DOI:10.1039/p29750001161
日期:——
oxidative rearrangement of primary amides with phenyl iodosylacetate (PIA) yields the corresponding acylamines in acetic acid. The kinetics of the reaction of PIA with a number of substituted benzamides have been studied in solvent acetic acid and also in acetic acid–water mixtures. Electron-releasing substituents in the benzenerIng accelerate the rate of the reaction while electron withdrawing substituents
Cobalt-catalysed C–H methylation for late-stage drug diversification
作者:Stig D. Friis、Magnus J. Johansson、Lutz Ackermann
DOI:10.1038/s41557-020-0475-7
日期:2020.6
despite its significance, accessing such analogues via derivatization at a late stage remains a pivotal challenge. In an effort to mitigate this major limitation, we here present a strategy for the cobalt-catalysed late-stage C–H methylation of structurally complex drug molecules. Enabling broad applicability, the transformation relies on a boron-based methyl source and takes advantage of inherently present
Compounds of the formula I:
or pharmaceutically acceptable salts thereof, wherein m, n, R
1
, R
2
, R
3
, R
4
and R
5
are as defined herein. Also disclosed are methods of making the compounds and using the compounds for treatment of diseases associated with the P2X7 purinergic receptor.
One-Pot Preparation of Aromatic Amides, 4-Arylthiazoles, and 4-Arylimidazoles from Arenes
作者:Takahiro Yamamoto、Hideo Togo
DOI:10.1002/ejoc.201800730
日期:2018.8.15
Primary aromatic amides, 4‐arylthiazoles, and 4‐arylimidazoles were smoothly obtained from arenes in good yield in onepot via aryl α‐bromoacetylarenes, which were obtained by reacting simple arenes with α‐bromoacetyl chloride and AlCl3, followed by the reaction with molecular iodine and aq. NH3, thioamides, or amidine under transition‐metal‐free conditions.