Radical 1,2-Alkylarylation/Acylarylation of Allylic Alcohols with Aldehydes via Neophyl Rearrangement
作者:Changduo Pan、Qingting Ni、Yu Fu、Jin-Tao Yu
DOI:10.1021/acs.joc.7b01255
日期:2017.7.21
A metal-free 1,2-alkylarylation of allylicalcohols with aliphatic aldehydes through concomitant radical neophyl rearrangement was developed, providing 1,2-diphenyl-3-alkyl propanones in moderate to good yields. Moreover, when cyclopropanecarbaldehyde and aryl carbaldehydes were concerned, acylarylation was involved leading to 1,4-dicarbonyl compounds.
Synthesis and Photochromism of Novel Pyridyl-Substituted Naphthopyrans
作者:Orlando D. C. C. de Azevedo、Paul I. P. Elliott、Christopher D. Gabbutt、B. Mark Heron、Kyle J. Lord、Christopher Pullen
DOI:10.1021/acs.joc.0c01296
日期:2020.8.21
Multitarget synthetic strategies to access novelphotochromic 3H-naphtho[2,1-b]pyrans decorated with pyridyl units are described. The new pyridyl-substituted 3H-naphtho[2,1-b]pyrans display good photochromicproperties with reversible generation of photomerocyanines, which exhibit mainly orange/red hues. Photochromic parameters including photocolorability and persistence of color vary tremendously
描述了多目标合成策略,以访问新型的吡啶基单元修饰的光致变色3 H-萘[ 2,1- b ]吡喃。新的吡啶基取代的3 H-萘[ 2,1 - b ]吡喃具有良好的光致变色特性,可逆生成的光金属花青素主要表现为橙色/红色。光致变色参数(包括光致变色性和颜色的持久性)在萘并吡喃核的结构修饰上有很大差异。
Silver-catalyzed carbonphosphonation of α,α-diaryl allylic alcohols: synthesis of β-aryl-γ-ketophosphonates
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.
Metal-free oxidative C(sp<sup>3</sup>)–H bond functionalization of alkanes and alkylation-initiated radical 1,2-aryl migration in α,α-diaryl allylic alcohols
作者:Jincan Zhao、Hong Fang、Ruichun Song、Jie Zhou、Jianlin Han、Yi Pan
DOI:10.1039/c4cc07654k
日期:——
An oxidativeC(sp(3))-H bondfunctionalization of alkanes and alkylation-initiated radical 1,2-aryl migration in alpha,alpha-diaryl allylic alcohols using di-tert-butyl peroxide (DTBP) as the oxidant was established, which tolerates a wide range of simple alkane substrates and alpha,alpha-diaryl allylic alcohols for direct preparation of alpha-aryl-beta-alkylated carbonyl ketones.
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