UV Light-Mediated Difunctionalization of Alkenes through Aroyl Radical Addition/1,4-/1,2-Aryl Shift Cascade Reactions
摘要:
UV light-mediated difunctionalization of alkenes through an aroyl radical addition/1,4-/1,2-aryl shift has been described. The resulted aroyl radical from a photocleavage reaction added to acrylamide compounds followed by cyclization led to the formation of oxindoles, whereas the addition to cinnamic amides aroused a unique 1,4-aryl shift reaction. Furthermore, the difunctionalization of alkenes of prop-2-en-1-ols was also achieved through aroyl radical addition and a sequential 1,2-aryl shift cascade reaction.
Iron-Promoted Difunctionalization of Alkenes by Phenylselenylation/1,2-Aryl Migration
作者:Ping Wu、Kaikai Wu、Liandi Wang、Zhengkun Yu
DOI:10.1021/acs.orglett.7b02751
日期:2017.10.6
Iron-promoted difunctionalization of α,α-diaryl and α-aryl-α-alkyl allylic alcohols has been efficiently achieved by means of N-(phenylseleno)phthalimide (N-PSP) under mild conditions. An in situ generated phenylselenium cation (PhSe+) was added to the olefinic C═C bond to initiate the regioselective phenylselenylation with concomitant 1,2-aryl migration, following a migration preference contrary to
Electrochemical Oxidative Aryl(alkyl)trifluoromethylation of Allyl Alcohols via 1,2-Migration
作者:Zhipeng Guan、Huamin Wang、Yange Huang、Yunkun Wang、Shengchun Wang、Aiwen Lei
DOI:10.1021/acs.orglett.9b01518
日期:2019.6.21
An electrochemical oxidative difunctionalization of allyl alcohols for the synthesis of β-trifluoromethyl ketones is achieved through a 1,2-migration process. A series of β-trifluoromethyl ketones can be facilely obtained utilizing CF3SO2Na as a radical source, eliminating the use of metals and sacrificial chemical oxidants. Importantly, this protocol not only realizes aryl migration but also offers
通过1,2-迁移过程可实现烯丙醇的电化学氧化双官能化,以合成β-三氟甲基酮。利用CF 3 SO 2 Na作为自由基源可以轻松获得一系列β-三氟甲基酮,而无需使用金属和牺牲性化学氧化剂。重要的是,该协议不仅实现了芳基迁移,而且还提供了烷基迁移产物。另外,电化学催化的环膨胀和克级反应证明了该方案的合成有用性。
Palladium-catalyzed cross-coupling of α-bromocarbonyls and allylic alcohols for the synthesis of α-aryl dicarbonyl compounds
作者:Yang Yu、Uttam K. Tambar
DOI:10.1039/c5sc00505a
日期:——
A palladium-catalyzed coupling of α-bromocarbonyl compounds and allylic alcohols has been developed for the generation of acyclic aryl-substituted dicarbonyl compounds.
A rapid and efficient, acid-promoted strategy to access allylic thiocyanates using allylic alcohols as substrates and easily-available NH4SCN as the thiocyanate source is presented under metal- and oxidant-free conditions. Various tertiary and secondary allylic alcohols are tolerated in this mild reaction system.
Rapid Access to γ,γ‐Dichloroketones <i>via</i> Radical‐Induced Dichloromethylation and Concomitant 1,2‐Aryl Migration of Allylic Alcohols with CHCl<sub>3</sub>
作者:Jiantao Zhang、Weiming Zhu、Peng Zhou、Cui Chen、Xianwei Li、Weibing Liu
DOI:10.1002/adsc.202300828
日期:2023.11.21
A radical-induced dichloromethylation and concomitant 1,2-aryl migration of allylic alcohols with CHCl3 is developed for the construction of γ,γ-dichloroketones in moderate to good yields. We found that, for the para-substituted unsymmetrical substrates, the more electron-deficient aryl group migrates preferentially over the more electron-rich aryl group. Moreover, chlorocyclopropanes could be obtained