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
Eosin Y-catalyzed, visible-light-promoted carbophosphinylation of allylic alcohols <i>via</i> a radical neophyl rearrangement
作者:Yao Yin、Wei-Zhi Weng、Jian-Guo Sun、Bo Zhang
DOI:10.1039/c8ob00231b
日期:——
phosphinylation of allylic alcohols with concomitant 1,2-aryl migration is described. This transformation proceeds smoothly under metal-free and mild conditions by using an inexpensive organic dye, eosin Y, as the photocatalyst, affording various β-aryl-γ-ketophosphine oxides in moderate to good yields. Mechanistic studies suggested that the 1,2-aryl migration proceeded through a radical (neophyl) rearrangement
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.
Metal-free oxidative direct C(sp<sup>3</sup>)–H bond functionalization of ethers with α,α-diaryl allylic alcohols
作者:Xue-Qiang Chu、Hua Meng、You Zi、Xiao-Ping Xu、Shun-Jun Ji
DOI:10.1039/c4cc04282d
日期:——
A metal-free method for direct C(sp(3))-H bondfunctionalization of simple ethers with alpha,alpha-diaryl allylic alcohols is described. The established protocol provides facile access to alpha-aryl-beta-oxyalkylated carbonyl ketones via radical addition and a 1,2-aryl migration cascade process. An application of the product has been demonstrated in the synthesis of a serotonin antagonist.
One‐Pot Synthesis of Allylic Sulfones, Ketosulfones, and Triflyl Allylic Alcohols from Domino Reactions of Allylic Alcohols with Sulfinic Acid under Metal‐Free Conditions
作者:Xue‐Qiang Chu、Hua Meng、Xiao‐Ping Xu、Shun‐Jun Ji
DOI:10.1002/chem.201500469
日期:2015.8.3
A metal‐free tandem procedure by using a sulfonylation reaction of aryl allylicalcohols followed by an iodobenzenediacetate (PIDA)‐promoted oxidative functionalization has been established. Allylicsulfones, γ‐ketosulfones, and triflylallylicalcohols have been constructed in a single operation. The methodology incorporates the sulfonyl (both aryl and triflyl) functionality with a simple work‐up