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
Organoiodine‐Catalyzed Enantioselective Alkoxylation/Oxidative Rearrangement of Allylic Alcohols
作者:Dong‐Yang Zhang、Ying Zhang、Hua Wu、Liu‐Zhu Gong
DOI:10.1002/anie.201903007
日期:2019.5.27
An enantioselective catalytic alkoxylation/oxidative rearrangement of allylic alcohols has been established by using a Brønsted acid and chiral organoiodine. The presence of 20 mol % of an (S)‐proline‐derived C2‐symmetric chiral iodine led to enantioenriched α‐arylated β‐alkoxylated ketones in good yields and with high levels of enantioselectivity (84–94 % ee).
Radical 1,2-aryl migration in α,α-diaryl allylic alcohols toward β-silyl ketones
作者:Haibo Peng、Jin-Tao Yu、Yan Jiang、Jiang Cheng
DOI:10.1039/c5ob01855b
日期:——
A copper-catalyzed radical 1,2-aryl migration in α,α-diaryl allylic alcohols is developed, leading to β-silyl carbonyl compounds in moderate to good yields. The migration of aryls with lower aromaticity is favored. This procedure features the employment of silanes as commercially available materials.
Copper(I)-catalyzed phosphonyldifluoromethylation of allylic alcohols promoted by daylight is described. This method provides a facile and economic access to a series of 3-difluoromethylphosphonate-1,2-diphenylpropan-1-ones. Mechanistic studies reveal that a radical process is involved in the reaction.
Oxidative radical 1,2-alkylarylation of alkenes with α-C(sp<sup>3</sup>)–H bonds of acetonitriles involving 1,2-aryl migration
作者:Yang Li、Bang Liu、Hai-Bing Li、Qiuan Wang、Jin-Heng Li
DOI:10.1039/c4cc08902b
日期:——
unactivated alkenes with the alpha-C(sp(3))-H bonds of acetonitriles for the synthesis of 5-oxo-pentanenitriles is presented. In the presence of TBPB (tert-butyl peroxybenzoate), a variety of alpha-aryl allylic alcohols underwent the 1,2-alkylarylation reaction with acetonitriles, giving 5-oxo-pentanenitriles in good to excellent yields. This method proceeds via the C(sp(3))-H oxidative coupling with the