1
|
Singh H. The mechanistic study of reaction between N-benzoyl carbamates and aliphatic/aromatic amines for synthesis of substituted N-benzoyl urea derivatives: a DFT approach. Struct Chem 2019. [DOI: 10.1007/s11224-018-1171-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
2
|
Yaragorla S, Dada R, Rajesh P, Sharma M. Highly Regioselective Synthesis of Oxindolyl-Pyrroles and Quinolines via a One-Pot, Sequential Meyer-Schuster Rearrangement, Anti-Michael Addition/C (sp3)-H Functionalization, and Azacyclization. ACS OMEGA 2018; 3:2934-2946. [PMID: 30023853 PMCID: PMC6044873 DOI: 10.1021/acsomega.8b00147] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 02/27/2018] [Indexed: 06/08/2023]
Abstract
A one-pot, sequential Meyer-Schuster (MS) rearrangement of oxindole-derived propargyl alcohols to the corresponding α,β-unsaturated enones and their anti-Michael addition, followed by intramolecular azacyclization is described in a highly regioselective manner using Ca(OTf)2 as the promoter. Further, we described the one-pot MS rearrangement, followed by C(sp3)-H functionalization of 2-methyl azaarenes at α-carbon of these doubly activated alkenes. Control experiments and computational calculations were performed to propose the reaction mechanism.
Collapse
|
3
|
Zhu LH, Yuan HY, Li WL, Zhang JP. A computational mechanistic study of substrate-controlled competitive O–H and C–H insertion reactions catalyzed by dirhodium(ii) carbenoids: insight into the origin of chemoselectivity. Org Chem Front 2018. [DOI: 10.1039/c8qo00475g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
DFT calculations disclosed the chemoselectivity of rhodium carbenoid and water co-catalyzed O–H and C–H insertion reactions with three 1,3-diketone substrates.
Collapse
Affiliation(s)
- Li-Han Zhu
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
| | - Hai-Yan Yuan
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
| | - Wen-Liang Li
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
| | - Jing-Ping Zhang
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
| |
Collapse
|
4
|
Zhu L, Yuan H, Zhang J. Mechanistic investigation on N → C α → O relay via non-Brook rearrangement: reaction conditions promote synthesis of furo[3,2-c]pyridinones. Org Biomol Chem 2017; 15:9127-9138. [PMID: 29051939 DOI: 10.1039/c7ob02081c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A comprehensive density functional theory investigation was employed to disclose the effect of reaction conditions on the mechanism and effective anion relay sequence of a NaH promoted non-Brook rearrangement of benzaldehyde and 1-cinnamoylcyclopropanecarboxamides. Two main mechanisms were explored under four different reaction conditions: Na+-assisted and nH2O-Na+, 2H2O-DMSO-Na+, and Na+-DMSO co-assisted, and the difference relies on the reaction sequence between the concerted ring-opening and recyclization and electrophilic addition. Being different from previous reports, a cooperative participation of water, solvent DMSO and counterion Na+ is revealed in the preferential mechanism. The preferred scenario undergoes five major steps: deprotonation, aza-Michael addition, electrophilic addition, NaOH elimination and a concerted ring-opening and recyclization step. The rate-determining step is the concerted ring-opening and recyclization process with an energy barrier of 30.2 kcal mol-1. We found that the effective anion relay of a non-Brook rearrangement order is N → Cα → O rather than the previously proposed aza-oxy-carbanion. Meanwhile, a mixed type of ARC chemistry through a novel non-Brook rearrangement was disclosed. Moreover, the non-covalent interactions between substrate and reactant extensively affect the anion relay process by hydrogen-bonding (O-HO and C-HO) and electrostatic (Na+O) interactions. Thus, our results provide insightful clues to the mechanism of the reaction condition catalyzed non-Brook rearrangement reaction.
Collapse
Affiliation(s)
- Lihan Zhu
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, China.
| | | | | |
Collapse
|
5
|
Yuan H, Xiao P, Zheng Y, Zhang J. DFT studies on the mechanism of Ag2
CO3
-catalyzed hydroazidation of unactivated terminal alkynes with TMS-N3
: An insight into the silver(I) activation mode. J Comput Chem 2017; 38:2289-2297. [DOI: 10.1002/jcc.24879] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 06/21/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Haiyan Yuan
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry; Northeast Normal University; Renmin Street 5268# Changchun 130024 China
| | - Pin Xiao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry; Northeast Normal University; Renmin Street 5268# Changchun 130024 China
| | - Yiying Zheng
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry; Northeast Normal University; Renmin Street 5268# Changchun 130024 China
| | - Jingping Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry; Northeast Normal University; Renmin Street 5268# Changchun 130024 China
| |
Collapse
|
6
|
Liu J, Zheng Y, Liu Y, Yuan H, Zhang J. Mechanistic insight on (E)-methyl 3-(2-aminophenyl)acrylate cyclization reaction by multicatalysis of solvent and substrate. J Comput Chem 2016; 37:2386-94. [PMID: 27487815 DOI: 10.1002/jcc.24463] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 07/11/2016] [Accepted: 07/11/2016] [Indexed: 12/17/2022]
Abstract
The reaction mechanism of (E)-methyl 3-(2-aminophenyl)acrylate (A) with phenylisothiocyanate (B) as well as the vital roles of substrate A and solvent water were investigated under unassisted, water-assisted, substrate A-assisted, and water-A-assisted conditions. The reaction proceeds with four processes via nucleophilic addition, deprotonation and protonation, intramolecular cyclization with hydrogen transfer, and keto-enol tautomerization. According to the different H-shift mode, two possible types of H-shift P1 and P2 are carefully investigated to identify the most preferred pathway, differing in the NH2 group deprotonation and CH group of A protonation processes. It is found that substrate A and water not only act as reactant and solvent, but also as catalyst, proton shuttle, and stabilizer in effectively lowering the energy barrier. Therefore, the results demonstrate that the strong donating and accepting ability of NH2 group on A and the presence of bulk water are the keys to the title reaction proceed. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Jiahui Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Renmin Street 5268#, Changchun, 130024, China
| | - Yiying Zheng
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Renmin Street 5268#, Changchun, 130024, China
| | - Ying Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Renmin Street 5268#, Changchun, 130024, China
| | - Haiyan Yuan
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Renmin Street 5268#, Changchun, 130024, China.
| | - Jingping Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Renmin Street 5268#, Changchun, 130024, China.
| |
Collapse
|
7
|
Singh A, Goel N. Cycloaddition of CS 2to N-benzylaziridine to synthesize N-benzylthiazolidine-2-thione: a novel reaction route proposed by DFT Study. J PHYS ORG CHEM 2016. [DOI: 10.1002/poc.3578] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Amritpal Singh
- Department of Chemistry and Centre of Advanced Studies in Chemistry; Panjab University; Chandigarh 160014 India
| | - Neetu Goel
- Department of Chemistry and Centre of Advanced Studies in Chemistry; Panjab University; Chandigarh 160014 India
| |
Collapse
|
8
|
Xiao P, Yuan H, Liu J, Zheng Y, Bi X, Zhang J. Radical Mechanism of Isocyanide-Alkyne Cycloaddition by Multicatalysis of Ag2CO3, Solvent, and Substrate. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01703] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pin Xiao
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Haiyan Yuan
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Jianquan Liu
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yiying Zheng
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xihe Bi
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Jingping Zhang
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| |
Collapse
|
9
|
Luo H, Pan L, Xu X, Liu Q. Friedel–Crafts Coupling of Electron-Deficient Benzoylacetones Tuned by Remote Electronic Effects. J Org Chem 2015; 80:8282-9. [DOI: 10.1021/acs.joc.5b01371] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hongmei Luo
- Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People’s Republic of China
| | - Ling Pan
- Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People’s Republic of China
| | - Xianxiu Xu
- Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People’s Republic of China
| | - Qun Liu
- Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People’s Republic of China
| |
Collapse
|
10
|
Singh A, Goel N. Regioselective nucleophilic aromatic substitution reactions of 5,7-dinitroquinazoline-4-one and 5,7-dinitroquinazoline-4-thione with methylamine: a mechanistic consideration. NEW J CHEM 2015. [DOI: 10.1039/c5nj00291e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thiocarbonyls, similar to carbonyls, are able to provide regioselective control for the attack of amines at the peri-position of 5,7-dinitroquinazoline-4-thione through intramolecular N–H–SC hydrogen bonding.
Collapse
Affiliation(s)
- Amritpal Singh
- Department of Chemistry & Centre of Advanced Studies in Chemistry
- Panjab University
- Chandigarh-160014
- India
| | - Neetu Goel
- Department of Chemistry & Centre of Advanced Studies in Chemistry
- Panjab University
- Chandigarh-160014
- India
| |
Collapse
|
11
|
Lu H, Lin JB, Liu JY, Xu PF. One-Pot Asymmetric Synthesis of Quaternary Pyrroloindolones through a Multicatalytic N-Allylation/Hydroacylation Sequence. Chemistry 2014; 20:11659-63. [DOI: 10.1002/chem.201402947] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Indexed: 12/17/2022]
|
12
|
|
13
|
Liu X, Zhang L, Xu X, Wang S, Pan L, Zhang Q, Liu Q. Aerobic copper-catalyzed oxidative [6C+1C] annulation: an efficient route to seven-membered carbocycles. Chem Commun (Camb) 2014; 50:8764-7. [DOI: 10.1039/c4cc03095h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A copper-catalyzed aerobic tandem Michael addition–intramolecular radical cyclization–benzyl C(sp3)–H bond oxidation reaction of dicinnamoyl ketene dithioacetals and ethyl cyanoacetate was developed for the diastereoselective synthesis of seven-membered carbocycles.
Collapse
Affiliation(s)
- Xiao Liu
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
| | - Lingjuan Zhang
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
| | - Xianxiu Xu
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
| | - Shan Wang
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
| | - Ling Pan
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
| | - Qian Zhang
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
| | - Qun Liu
- Department of Chemistry
- Northeast Normal University
- Changchun 130024, China
| |
Collapse
|
14
|
α(δ')-Michael addition of alkyl amines to dimethyl (E)-hex-2-en-4-ynedioate: synthesis of α,β-dehydroamino acid derivatives. Molecules 2013; 18:2611-22. [PMID: 23446918 PMCID: PMC6270175 DOI: 10.3390/molecules18032611] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 02/07/2013] [Accepted: 02/20/2013] [Indexed: 11/17/2022] Open
Abstract
The direct nucleophilic addition of alkyl amines to the α(δ')-carbon atom of dimethyl (E)-hex-2-en-4-ynedioate to generate α,β-dehydroamino acid derivatives is reported. Herein, we have studied the reactivity of various primary and secondary alkyl amines in the α-selective nucleophilic conjugate addition to conjugated dimethyl (E)-hex-2-en-4-ynedioate. The reaction with primary alkyl amines gives only the (2E,4E)-stereoisomer, while that with secondary alkyl amines gives the (2E,4E) and (2Z,4E)-stereoisomers of dimethyl (2-alkylamino)-muconic ester.
Collapse
|