Silver-catalyzed carbonphosphonation of α,α-diaryl allylic alcohols is achieved. A series of γ-ketophosphonates with different substituents were readily obtained. The mechanistic study indicated that the reaction was initiated by the addition of P-radicals, which sequentially undergo 1,2-migration of an aryl group to form C(Ar)âC(sp3) bonds.
Oxidative alkylation of alkenes with carbonyl compounds through concomitant 1,2-aryl migration by photoredox catalysis
作者:Zhaowei Lin、Maojian Lu、Boyi Liu、Jing Gao、Mingqiang Huang、Zhenhong Gan、Shunyou Cai
DOI:10.1039/d0nj03733h
日期:——
Visible-light-enabled oxidative radical 1,2-alkylarylation of α-aryl allylic alcohols with carbonylcompounds has been established under mild conditions. An efficient and convenient protocol for the construction of a variety of 1,5-dicarbonyl compounds was realized in the presence of organic fluorophore 4CzIPN, hypervalent iodine(III) reagent, and visible light irradiation. An obvious kinetic isotope
Visible-Light-Enabled Oxidative Alkylation of Unactivated Alkenes with Dimethyl Sulfoxide through Concomitant 1,2-Aryl Migration
作者:Maojian Lu、Honggui Qin、Zhaowei Lin、Mingqiang Huang、Wen Weng、Shunyou Cai
DOI:10.1021/acs.orglett.8b03340
日期:2018.12.7
of dimethyl sulfoxide has been developed. This study realizes a new, conceptually novel technology for convenient construction of a variety of α-aryl-γ-methylsulfinyl ketones in good-to-excellent yields with the synergistic interactions of visible light irradiation, organic fluorophores 4CzIPN, and hypervalentiodine(III) reagent under transition-metal free conditions. A remarkable kinetic isotope effect
Metal-Free Oxidative Radical Addition of Carbonyl Compounds to α,α-Diaryl Allylic Alcohols: Synthesis of Highly Functionalized Ketones
作者:Xue-Qiang Chu、Hua Meng、You Zi、Xiao-Ping Xu、Shun-Jun Ji
DOI:10.1002/chem.201404463
日期:2014.12.15
A metal‐free directalkylation of simple carbonyl compounds (ketones, esters, and amides) with α,α‐diaryl allylic alcohols is described. The protocol provides facile access to highly functionalized dicarbonyl ketones by a radical addition/1,2‐aryl migration cascade. The regioselectivity of the reaction was precisely controlled by the nature of the carbonyl compound.
Fe(<scp>iii</scp>)-mediated isomerization of α,α-diarylallylic alcohols to ketones via radical 1,2-aryl migration
作者:Ziyang Deng、Changwei Chen、Sunliang Cui
DOI:10.1039/c6ra20007a
日期:——
An Fe(III)-mediated radical 1,2-aryl migration of α,α-diarylallylic alcohols for the isomerization to ketones is described. The Fe(acac)3–silane would convert the alkene to an alkyl radical and initiates a 1,2-aryl migration-oxidation process. Thus Fe(acac)3 serves as an olefin hydrogen atom transfer initiator and oxidant, while various allylic alcohols could isomerize to ketones in moderate to good