通讯作者:
Dr. Jia-Rong Chen<&wdkj&>Prof. Dr. Wen-Jing Xiao
作者机构:
[Xiao-Qiang Hu; Dr. Jia-Rong Chen; Prof. Dr. Wen-Jing Xiao] CCNU-uOttawa Joint Research Center, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei, 430079 China
通讯机构:
[Dr. Jia-Rong Chen; Prof. Dr. Wen-Jing Xiao] C;CCNU-uOttawa Joint Research Center, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei, 430079 China
摘要:
Fernsteuerung: Neue Strategien für die Aktivierung entfernter C(sp³)-H-Bindungen durch photoredoxkatalysierte (PC) radikalische Umlagerungen über O- und N-zentrierte Radikale wurden vor kurzem beschrieben. Die Methoden ermöglichen die kontrollierte und regioselektive Funktionalisierung von inerten C(sp³)-H-Bindungen und eröffnen neue Möglichkeiten für die Reaktionsplanung (HAT=Wasserstoffatomtransfer).
作者机构:
[Zhao, Quan-Qing; Xiao, Wen-Jing; Chen, Jun; Chen, Jia-Rong; Yan, Dong-Mei] Cent China Normal Univ, Coll Chem, Key Lab Pesticides & Chem Biol, CNU uOttawa Joint Res Ctr,Minist Educ, 152 Luoyu Rd, Wuhan 430079, Peoples R China.;[Xiao, Wen-Jing] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China.
通讯机构:
[Chen, Jia-Rong] C;Cent China Normal Univ, Coll Chem, Key Lab Pesticides & Chem Biol, CNU uOttawa Joint Res Ctr,Minist Educ, 152 Luoyu Rd, Wuhan 430079, Peoples R China.
摘要:
A novel photocatalytic hydrazonyl radical-mediated radical cyclization/allylation cascade reaction of beta,gamma-unsaturated hydrazones is developed using allyl sulfones and Morita-Baylis-Hillman adduct as allyl sources, which provides an efficient and practical access to various diversely functionalized dihydropyrazoles and tetrahydropyridazines. The reaction is enabled by controllable generation of hydrazonyl radicals via an oxidative deprotonation electron transfer strategy and selective trapping of the resultant C-centered radicals under visible light irradiation.
期刊:
JOURNAL OF ORGANIC CHEMISTRY,2017年82(23):12134-12140 ISSN:0022-3263
通讯作者:
Lu, Liang-Qiu;Xiao, Wen-Jing
作者机构:
[Lu, LQ; Xiao, WJ; Lu, Liang-Qiu; Li, Tian-Ren; Wang, Ya-Ni; Cheng, Bei-Yi; Xiao, Wen-Jing] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Hubei Int Sci & Technol Cooperat Base Pesticide &, Wuhan 430079, Hubei, Peoples R China.;[Xiao, Wen-Jing] Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300072, Peoples R China.
通讯机构:
[Lu, LQ; Xiao, WJ; Xiao, Wen-Jing] C;Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Hubei Int Sci & Technol Cooperat Base Pesticide &, Wuhan 430079, Hubei, Peoples R China.;Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300072, Peoples R China.
摘要:
A reaction sequence comprising a formal [4 + 1] cycloaddition, an E1cb elimination, and an aromatization process is described in this work. By doing so, polysubstituted pyrroles were achieved from easily available chemicals, sulfur ylides, and α,β-unsaturated imines. This protocol features mild conditions, high efficiency, and wide substrate scopes.
作者机构:
[Tian-Ren Li; Bei-Yi Cheng; Ya-Ni Wang; Mao-Mao Zhang; Liang-Qiu Lu; Wen-Jing Xiao] Key Laboratory of Pesticide & Chemical Biology Ministry of Education,College of Chemistry,Central China Normal University
会议名称:
中国化学会第十一届全国天然有机化学学术会议
会议时间:
2016-09-25
会议地点:
中国上海
摘要:
<正>The development of new methodologies that enable facile access to valuable heterocycles remains a subject of intensive research in chemical sciences.In this context,the construction of the indole scaffold,a nitrogen-containing heterocyclic motif prevalent in
期刊:
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2016年138(27):8360-8363 ISSN:0002-7863
通讯作者:
Lu, Liang-Qiu;Xiao, Wen-Jing
作者机构:
[Lu, LQ; Xiao, WJ; Lu, Liang-Qiu; Li, Tian-Ren; Xiao, Wen-Jing; Li, Miao-Miao; Wang, Qiang; Zhang, Kai] Cent China Normal Univ, Coll Chem, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.;[Xiao, Wen-Jing] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China.
通讯机构:
[Lu, LQ; Xiao, WJ] C;[Xiao, Wen-Jing] L;Cent China Normal Univ, Coll Chem, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.;Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China.
摘要:
The first copper-catalyzed asymmetric decarboxylative [4 + 1] cycloaddition of propargylic carbamates and sulfur ylides was successfully developed. This strategy led to a series of chiral indolines with synthetically flexible alkyne groups in good yields and with high enantio- and diastereoselectivities (up to 99% yield, 98% ee, and >95:5 dr). A possible mechanism and stereoinduction mode with copper-allenylidenes were proposed as the possible dipolar intermediate.
期刊:
Chemical Communications,2016年52(53):8275-8278 ISSN:1359-7345
通讯作者:
Chen, Jia-Rong;Xiao, Wen-Jing
作者机构:
[Chen, Dong-Zhen; Yu, Xing-Long; Chen, Jia-Rong; Xiao, WJ; Xiao, Wen-Jing] Cent China Normal Univ, Coll Chem, Minist Educ, CCNU uOttawa Joint Res Ctr,Key Lab Pesticide & Ch, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.;[Xiao, Wen-Jing] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China.
通讯机构:
[Chen, JR; Xiao, WJ] C;[Xiao, Wen-Jing] L;Cent China Normal Univ, Coll Chem, Minist Educ, CCNU uOttawa Joint Res Ctr,Key Lab Pesticide & Ch, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.;Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China.
摘要:
The efficient visible light photocatalytic azotrifluoromethylation of alkenes with aryldiazonium salts and sodium triflinate is described, which gave the corresponding trifluoromethylated azo compounds in generally good yields. The trifluoromethylated azo products can be easily transformed into useful heterocycles and nitrogen-containing building blocks.
摘要:
Here, we describe a novel [3 + 2] cycloaddition of 3-substituted indoles with vinyl aziridines and vinyl epoxides that provides a straightforward approach to pyrroloindolines and furoindolines bearing vinyl groups (up to 96% yield and 9:1 dr). In contrary to previous reports involving Lewis acid activation, this work reports successful reactions based on the activation of indole using t-BuOK and BEt3 (triethylborane), thereby preserving the free N–H group on indoles. In addition, a gram-scale reaction and a ring-closing metatheis reaction are performed to provide good demonstrations of the synthetic utility of this approach.
通讯机构:
[Chen, Jia-Rong] C;Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
摘要:
A base-catalyzed divergent reaction of 3-ylideneoxindoles with O-Boc hydroxycarbamates has been developed to provide efficient access to various amidoacrylates and spiroaziridine oxindoles with generally high yields, which should be potentially useful in drug discovery.
作者机构:
[Xiao Wenjing] CCNU-uOttawa Joint Research Center, College of Chemistry, Central China Normal University, Wuhan, 430079
通讯机构:
[Wen-Jing Xiao] C;CCNU-uOttawa Joint Research Center, College of Chemistry, Central China Normal University, Wuhan, China
关键词:
Preface;special;topic
摘要:
Catalysis under irradiation by visible light has become a highly dynamic and promising research area in chemical sciences. Such catalysis primarily entails photoinduced electron- and energy-transfer chemistry sensitized by polypyridyl complexes, organic dyes, and heterogeneous catalysts. Remarkably though, while the electrochemical and photophysical properties of these catalysts have been extensively studied, only recently has the chemical community begun to appreciate the great potential of the utilization of visible-light photocatalysis as a broadly useful methodology to advanced organic synthesis. Since 2008, visiblelight photocatalysis has witnessed a rapid development as a possible alternative to strong oxidizing and reducing agents and radical-initiating reagents. Due to the relative obscurity of photoredox catalysis in organic synthesis, the primary focus of this thematic issue will be centered on modern photocatalysis, especially in the context of photo-driven electron- and energy-transfer catalysis.
通讯机构:
[Xiao, Wen-Jing] C;Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
摘要:
An intermolecular radical–radical cross-coupling reaction of secondary and tertiary amines with aryl ketones and aldehydes has been developed using visible light photoredox catalysis. This reaction provides an efficient and straightforward approach to some useful 1,2-amino alcohols in moderate to good yields under mild conditions.
作者机构:
[Feng, Bin; Xiao, Wen-Jing; Chen, Jia-Rong; Pu, Xiao-Yu; Liu, Zhi-Cheng] Cent China Normal Univ, Minist Educ, Key Lab Pesticide & Chem Biol, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.;[Feng, Bin; Xiao, Wen-Jing; Chen, Jia-Rong; Pu, Xiao-Yu; Liu, Zhi-Cheng] Cent China Normal Univ, Coll Chem, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.;[Xiao, Wen-Jing] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China.
通讯机构:
[Chen, Jia-Rong] C;Cent China Normal Univ, Minist Educ, Key Lab Pesticide & Chem Biol, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.;Cent China Normal Univ, Coll Chem, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
摘要:
A novel type of binaphthyl-based phosphoramidite-thioether ligand has been developed and successfully applied to Pd-catalysed asymmetric C-3 allylic alkylation of indoles, giving the desired products with up to 99% yield and 98% ee.
通讯机构:
[Lu, Liang-Qiu] C;Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
摘要:
This paper discloses the first example of photocatalytic direct decarboxylative hydroxylation of carboxylic acids. It enables the conversion of a variety of readily available carboxylic acids to alcohols in moderate to high yields. This unprecedented protocol is accomplished under extremely mild reaction conditions using molecular oxygen (O2) as a green oxidant and using visible light as a driving force.