Formal [3 + 2] Reaction of α,α-Diaryl Allylic Alcohols with <i>sec</i>-Alcohols: Proceeding with Sequential Radical Addition/Migration toward 2,3-Dihydrofurans Bearing Quaternary Carbon Centers
作者:Weiming Hu、Song Sun、Jiang Cheng
DOI:10.1021/acs.joc.6b00643
日期:2016.5.20
3-dihydrofurans in moderate to excellent yields with good functional group tolerance. This procedure involves sequential radical addition, 1,2-arylmigration, and a dehydration process, where the migration of aryl with lower electron density is favored. Notably, cyclic reactions with sec-alcohols also ran smoothly, providing a novel method to access oxaspiro compounds.
One-step base promoted strategy for cyanation of α,α-diaryl alcohols has been developed under mild and transition metal-free conditions. This method provides a straightforward and facile way towards the synthesis of β,γ-unsaturated nitriles and α-phenylnitiriles from α-vinyl carbinols and α,α-diaryl methanols, respectively, up to 99% yield. Moreover, various azides and ethers could also be accessed
Visible light-mediated arylalkylation of allylic alcohols through concomitant 1,2-aryl migration
作者:Hong-Li Huang、Hang Yan、Chao Yang、Wujiong Xia
DOI:10.1039/c4cc10321a
日期:——
A photocatalytic process for selective arylalkylation of allylic alcoholsviaunique 1,2-aryl migration with α-bromo diethyl malonate has been developed.
一种通过α-溴乙基丙二酸酯进行独特的1,2-芳基迁移的光催化选择性芳基烯丙醇化反应已经开发出来。
Photocatalytic Radical Aroylation of Unactivated Alkenes: Pathway to β-Functionalized 1,4-, 1,6-, and 1,7-Diketones
作者:Satavisha Sarkar、Arghya Banerjee、Wang Yao、Eric V. Patterson、Ming-Yu Ngai
DOI:10.1021/acscatal.9b03570
日期:2019.11.1
the distal-group migration, and synthesis of carbocycles and heterocycles from the diketones are also described. Mechanistic studies suggest a reaction pathway involving a photocatalytic radical aroylation of unactivated alkenes followed by a distal-group migration, oxidation, and deprotonation to afford the desired diketones.
Fluoroalkylation of Allylic Alcohols with Concomitant (Hetero)aryl Migration: Access to Fluoroalkylated Ketones and Evaluation of Antifungal Action against
<i>Magnaporthe grisea</i>
作者:Yanhu Zhang、Ziyang Ren、Yun‐Lin Liu、Zhentao Wang、Zhaodong Li
DOI:10.1002/ejoc.202000782
日期:2020.8.31
Fluoroalkyl(hetero)arylation of allylic alcohols with perfluoroalkyl iodide and difluoroacetic acid as coupling partners is reported herein. Mechanistic studies disclosed that the aryl migration proceeded through neophyl rearrangement in a radical pathway controlled by radical polarity. Moreover, promising antifungal activity against Magnaporthe grisea is also described for the first time.