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Dunkel P, Bogdán D, Deme R, Zimber Á, Ballayová V, Csizmadia E, Kontra B, Kalydi E, Bényei A, Mátyus P, Mucsi Z. C(sp 3)-H cyclizations of 2-(2-vinyl)phenoxy- tert-anilines. RSC Adv 2024; 14:16784-16800. [PMID: 38784409 PMCID: PMC11112676 DOI: 10.1039/d3ra08974f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 04/29/2024] [Indexed: 05/25/2024] Open
Abstract
1,5-hydride transfer-triggered cyclization reactions offering a robust method for C(sp3)-C(sp3) coupling and the synthesis of e.g. tetrahydroquinolines have been thoroughly investigated in the literature. Catalysts allowing milder reaction conditions or the development of enantioselective processes were important recent contributions to the field, as well as the studies on subtrates with oxygen or sulfur heteroatoms (besides the originally described nitrogen heterocycles). In a series of studies, we focused on expanded, higher order H-transfers/cyclizations by positioning the interacting substituents on distanced rings. Cyclizations of appropriately functionalized biaryl and fused bicyclic systems led to 7-9 membered rings. In the frame of this research, we set out to study the feasibility of the cyclization and the factors affecting it by in silico methods. The conclusions drawn from computational studies were complemented by cyclization screens on 2-(2-vinyl)phenoxy-tert-anilines and their CH2-expanded analogues, the results of which are presented here. Besides isolating the expected oxazonine products in several cases, we also observed a unique dimer formation, leading to an interesting 5-6-5 ring system.
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Affiliation(s)
- Petra Dunkel
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Dóra Bogdán
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Ruth Deme
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Ádám Zimber
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Veronika Ballayová
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
- Department of Chemical Drugs, Masaryk University Palackého 1946/1 612 00 Brno Czech Republic
| | - Eszter Csizmadia
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Bence Kontra
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
- Department of Biological Chemistry, Brain Vision Center Liliom utca 43-45 H-1094 Budapest Hungary
| | - Eszter Kalydi
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
| | - Attila Bényei
- Institute of Physical Chemistry, University of Debrecen Egyetem tér 1 H-4010 Debrecen Hungary
| | - Péter Mátyus
- Department of Organic Chemistry, Semmelweis University Hőgyes Endre utca 7 H-1092 Budapest Hungary
- University of Veterinary Medicine István utca 2 H-1078 Budapest Hungary
| | - Zoltán Mucsi
- Department of Biological Chemistry, Brain Vision Center Liliom utca 43-45 H-1094 Budapest Hungary
- Department of Chemistry, Femtonics Ltd Tűzoltó utca 59 H-1094 Budapest Hungary
- Institute of Chemistry, University of Miskolc Egyetem út 1 H-3515 Miskolc Hungary
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2
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Xie X, Huang H, Fan Y, Luo Y, Pang Q, Li X, Huang W. Assembly of spirocyclic pyrazolone-pyrrolo[4,3,2- de]quinoline skeleton via cascade [1,5] hydride transfer/cyclization by C(sp 3)-H functionalization. Org Biomol Chem 2023; 21:7300-7304. [PMID: 37667627 DOI: 10.1039/d3ob01063e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Herein, a highly efficient, scalable, and cascade [1,5] hydride transfer/cyclization method for constructing unique spirocyclic pyrazolone-pyrrolo[4,3,2-de]quinoline structures via C(sp3)-H functionalization is achieved, using pyrazolones and oxindoles attached to C4 amines. This strategy represents a limited approach utilizing C-H activation to construct spirocyclic pyrazolone scaffolds with moderate to excellent reaction performance.
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Affiliation(s)
- Xin Xie
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy and College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - He Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy and College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Yu Fan
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy and College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Yuan Luo
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy and College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Qiwen Pang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy and College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Xiang Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy and College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Wei Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy and College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
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A. Farghaly T, A. Al-Hussain S, E. A. Zaki M, H. Asghar B, A. Muhammad Z. Synthesis of spiropyrazoles under organic and nonorganic catalysis. CURR ORG CHEM 2022. [DOI: 10.2174/1385272826666220517220157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
Spiropyrazoles display many biological biological activities such as antitumor, vasodilation, analgesic, phosphodiesterase inhibitors, aldosterone antagonistic, anabolic, androgenic, anti-inflammatory, progestational and salt-retaining activities and they also exert neuroprotection in dopaminergic cell death. Many efforts have been made to obtain these derivatives with high yield and excellent regio-, diastereo- and enantioselectivities. Most of the spiroprazole synthesis methods were proceeded in good to excellent yield in the presence of organic catalysts as for examples squaramide, NHC pre-catalyst, pyrrole derivatives, bis-oxazoline, DMAP, DABCO, thiourea derivatives, DBU, acetic acid and quinoline catalysts. In addition, the inorganic and organo-metallic catalysts have been proven their efficiency in synthesis of various types of spiro-pyrazoles in excellent yield. Thus, in this review we have compiled all citations for the synthesis of spiropyrazoles in the presence of various types of catalysts such as organic, inorganic, and metalorganic catalysts in the range 2020 to 2012. This review article is a useful compilation for researchers interested in the synthesis of spiropyrazole derivatives and will assist them in selecting appropriate catalysts for preparation of their spiropyrazoles.
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Affiliation(s)
- Thoraya A. Farghaly
- Department of Chemistry, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Sami A. Al-Hussain
- Department of Chemistry, Faculty of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
| | - Magdi E. A. Zaki
- Department of Chemistry, Faculty of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
| | - Basim H. Asghar
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Zeinab A. Muhammad
- Department of Organic Chemistry, National Organization for Drug Control and Research (NODCAR), Giza 12311, Egypt
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4
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Liu H, Quan Y, Xie L, Li X, Xie X. The Cascade [1,5]-Hydride Shift/Intramolecular C(sp3)–H Activation: A Powerful Approach to the Construction of Spiro-Tetrahydroquinoline Skeleton. Front Chem 2022; 10:840934. [PMID: 35494642 PMCID: PMC9045402 DOI: 10.3389/fchem.2022.840934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 02/10/2022] [Indexed: 11/13/2022] Open
Abstract
The direct functionalization of inert C–H bonds is regarded as one of the most powerful strategies to form various chemical bonds and construct complex structures. Although significant advancements have been witnessed in the area of transition metal-catalyzed functionalization of inert C–H bonds, several challenges, such as the utilization and removal of expensive transition metal complexes, limited substrate scope and large-scale capacity, and poor atom economy in removing guiding groups coordinated to the transition metal, cannot fully fulfill the high standard of modern green chemistry nowadays. Over the past decades, due to its inherent advantage compared with a transition metal-catalyzed strategy, the hydride shift activation that applies “tert-amino effect” into the direct functionalization of the common and omnipresent C(sp3)–H bonds adjacent to tert-amines has attracted much attention from the chemists. In particular, the intramolecular [1,5]-hydride shift activation, as the most common hydride shift mode, enables the rapid and effective production of multifunctionally complex frameworks, especially the spiro-tetrahydroquinoline derivatives, which are widely found in biologically active natural products and pharmaceuticals. Although great accomplishments have been achieved in this promising field, rarely an updated review has systematically summarized these important progresses despite scattered reports documented in several reviews. Hence, in this review, we will summarize the significant advances in the cascade [1,5]-hydride shift/intramolecular C(sp3)-H functionalization from the perspective of “tert-amino effect” to build a spiro-tetrahydroquinoline skeleton, and the content is categorized by structure type of final spiro-tetrahydroquinoline products containing various pharmaceutical units. Besides, current limitations as well as future directions in this field are also pointed out. We hope our review could provide a quick look into and offer some inspiration for the research on hydride shift strategy in the future.
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Affiliation(s)
- Hongmei Liu
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Provincial People’s Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
- *Correspondence: Hongmei Liu, ; Xiang Li, ; Xin Xie,
| | - Yunyun Quan
- Translational Chinese Medicine Key Laboratory of Sichuan Province, Sichuan Academy of Chinese Medicine Sciences, Sichuan Institute for Translational Chinese Medicine, Chengdu, China
| | - Long Xie
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy and College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiang Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy and College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Hongmei Liu, ; Xiang Li, ; Xin Xie,
| | - Xin Xie
- State Key Laboratory of Southwestern Chinese Medicine Resources, Hospital of Chengdu University of Traditional Chinese Medicine, School of Pharmacy and College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- *Correspondence: Hongmei Liu, ; Xiang Li, ; Xin Xie,
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5
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Huang Y, Wei X, Bao X, Nawaz S, Qu J, Wang B. Asymmetric 1,3-dipolar cycloaddition of 4-aminopyrazolone-based azomethine ylides: a straightforward approach to spiropyrazolones. Org Chem Front 2022. [DOI: 10.1039/d2qo00426g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The asymmetric [3+2] cycloaddition of 4-amino pyrazolone-derived azomethine ylides with α,β-enones has been established for the synthesis of 4-spiropyazolones derivatives with four contiguous stereocenters. This cycloaddition process delivered spiro[pyrrolidine-2,4’-pyrazolone] derivatives...
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Zaitseva ER, Smirnov AY, Myasnyanko IN, Mineev KS, Sokolov AI, Volkhina TN, Mikhaylov AA, Baleeva NS, Baranov MS. Imidazol-5-ones as a substrate for [1,5]-hydride shift triggered cyclization. NEW J CHEM 2021. [DOI: 10.1039/d0nj05738j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
(2-Aminobenzylidene)-imidazolones were used as substrates for [1,5]-hydride shift triggered cyclization under promotion by TiCl4 at room temperature.
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Affiliation(s)
- Elvira R. Zaitseva
- Institute of Bioorganic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
- D. Mendeleev University of Chemical Technology of Russia
| | | | - Ivan N. Myasnyanko
- Institute of Bioorganic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
| | | | | | - Tatyana N. Volkhina
- D. Mendeleev University of Chemical Technology of Russia
- 9 Miusskaya Sq
- Moscow
- Russia
- A.N. Nesmeyanov Institute of Organoelement Compounds
| | | | | | - Mikhail S. Baranov
- Institute of Bioorganic Chemistry
- Russian Academy of Sciences
- Moscow
- Russia
- Pirogov Russian National Research Medical University
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7
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Liu S, Wang H, Wang B. Catalyst-free construction of spiro [benzoquinolizidine-chromanones] via a tandem condensation/1,5-hydride transfer/cyclization process. Org Biomol Chem 2020; 18:8839-8843. [PMID: 33104768 DOI: 10.1039/d0ob01887b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A catalyst-free tandem 1,5-hydride shift/cyclization process to form spiro [benzoquinolizidine-chromanones] is developed, which features high atom- and step-economy, high levels of stereocontrol, mild conditions, and a simple workup process. A series of new polycyclic spiro [benzoquinolizidine-chromanones] were obtained in high yields with excellent diastereoselectivities (up to 91% yield, >20 : 1 dr).
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Affiliation(s)
- Siyuan Liu
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, P. R. China.
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8
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Geng X, Liu S, Wang W, Qu J, Wang B. tert-Amino Effect-Promoted Rearrangement of Aryl Isothiocyanate: A Versatile Approach to Benzimidazothiazepines and Benzimidazothioethers. J Org Chem 2020; 85:12635-12643. [PMID: 32875799 DOI: 10.1021/acs.joc.0c01806] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A general and practical approach to benzimidazothiazepine and benzimidazothioether derivatives via an intramolecular nucleophilic addition/ring expansion rearrangement of aryl isothiocyanates promoted by the tert-amino effect has been developed. This reaction is catalyzed by low-cost camphorsulfonic acid and tolerates a broad substrate scope with complete atom economy. Structurally intriguing benzimidazothiazepine and benzimidazothioether products could be easily obtained by a simple operation in good to excellent yield (up to 98%).
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Affiliation(s)
- Xinyu Geng
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Siyuan Liu
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China.,Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, P. R. China
| | - Wenyao Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China.,Ningbo Institute of Dalian University of Technology, Ningbo 315016, P. R. China
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9
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Xie X, Xiang L, Peng C, Han B. Catalytic Asymmetric Synthesis of Spiropyrazolones and their Application in Medicinal Chemistry. CHEM REC 2019; 19:2209-2235. [PMID: 30821425 DOI: 10.1002/tcr.201800199] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/11/2019] [Accepted: 02/11/2019] [Indexed: 01/24/2023]
Abstract
Chiral spiropyrazolones are unique frameworks widely found in a large family of medicinally relevant compounds with various biological activities. Substantial research efforts have been invested toward stereoselectively by constructing spiro-cyclic structures. Over the past years, remarkable progress has been made in the organo- and metal-catalyzed asymmetric synthesis of spiropyrazolones through the utilization of accessible simple pyrazolone derivatives as raw materials. This review is organized according to the size of the spiro-ring fused at the 4-position of the pyrazolone framework. In the last part, the bio-evaluations of chiral spiropyrazolones for drug discovery are summarized.
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Affiliation(s)
- Xin Xie
- College of Medical Technology and School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Li Xiang
- State Key Laboratory of Southwestern Chinese Medicine Resource, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Cheng Peng
- College of Medical Technology and School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,State Key Laboratory of Southwestern Chinese Medicine Resource, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Bo Han
- College of Medical Technology and School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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10
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Keerthi Krishnan K, Ujwaldev SM, Saranya S, Anilkumar G, Beller M. Recent Advances and Perspectives in the Synthesis of Heterocycles
via
Zinc Catalysis. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800868] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- K. Keerthi Krishnan
- School of Chemical SciencesMahatma Gandhi University Priyadarsini Hills P O Kottayam 686 560 India
| | | | - Salim Saranya
- School of Chemical SciencesMahatma Gandhi University Priyadarsini Hills P O Kottayam 686 560 India
| | - Gopinathan Anilkumar
- School of Chemical SciencesMahatma Gandhi University Priyadarsini Hills P O Kottayam 686 560 India
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT Rostock) Albert-Einstein Straße 29a 18059 Rostock Germany
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11
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Liu S, Zhao T, Qu J, Wang B. Expedient Synthesis of 1,4‐Benzodiazepines via a Tandem Condensation/[1,5]‐Hydride Transfer/Cyclization Process. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800781] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Siyuan Liu
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and TechnologyDalian University of Technology Dalian 116024 People's Republic of China
| | - Tuan Zhao
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and TechnologyDalian University of Technology Dalian 116024 People's Republic of China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and TechnologyDalian University of Technology Dalian 116024 People's Republic of China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and TechnologyDalian University of Technology Dalian 116024 People's Republic of China
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12
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Liu S, Qu J, Wang B. Substrate-controlled divergent synthesis of polycyclic indoloazepines and indolodiazepines via 1,5-hydride shift/7-cyclization cascades. Chem Commun (Camb) 2018; 54:7928-7931. [PMID: 29951657 DOI: 10.1039/c8cc03804j] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Novel and practical acid-catalyzed cyclization of 2-indolyl aryl carbinols via tandem dehydration/1,5-hydride shift/7-cyclization sequences has been developed. By appropriate variation of the substrate, diverse polycyclic-fused indoles were synthesized in good yield, thus demonstrating the high efficiency, transition-metal-free nature, and high step/atom economy of the synthesis strategy.
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Affiliation(s)
- Siyuan Liu
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian 116024, P. R. China.
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13
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Liu S, Bao X, Wang B. Pyrazolone: a powerful synthon for asymmetric diverse derivatizations. Chem Commun (Camb) 2018; 54:11515-11529. [DOI: 10.1039/c8cc06196c] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This feature article reports recent advances in the asymmetric diverse derivatizations of the pyrazolone scaffold.
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Affiliation(s)
- Siyuan Liu
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Xiaoze Bao
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
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14
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Liu S, Zhang W, Qu J, Wang B. Engaging 2-methyl indolenines in a tandem condensation/1,5-hydride transfer/cyclization process: construction of a novel indolenine–tetrahydroquinoline assembly. Org Chem Front 2018. [DOI: 10.1039/c8qo00875b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
An efficient BF3·Et2O-catalyzed diastereoselective tandem condensation/1,5-hydride transfer/cyclization strategy for the synthesis of a novel indolenine–tetrahydroquinoline assembly was reported.
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Affiliation(s)
- Siyuan Liu
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
| | - Wenzhu Zhang
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
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15
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Xue F, Bao X, Zou L, Qu J, Wang B. Asymmetric Hydroxylation of 4-Substituted Pyrazolones Catalyzed by Natural Cinchona
Alkaloids. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201601070] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Fuzhao Xue
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 People's Republic of China
| | - Xiaoze Bao
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 People's Republic of China
| | - Liwei Zou
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 People's Republic of China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 People's Republic of China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 People's Republic of China
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16
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Zhao T, Zhang H, Cui L, Wang C, Qu J, Wang B. A ZnCl2-Catalyzed Knoevenagel Condensation/1,5-Hydride Shift/Cyclization Sequence: Synthesis of Novel Spiroisoxazol-5-one Tetrahydroquinolines. ChemistrySelect 2016. [DOI: 10.1002/slct.201600823] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tuan Zhao
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 P. R. China
| | - Huanrui Zhang
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 P. R. China
| | - Longchen Cui
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 P. R. China
| | - Changxue Wang
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 P. R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 P. R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 P. R. China
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17
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Bao X, Wei S, Zou L, Song Y, Qu J, Wang B. Asymmetric fluorination of 4-substituted pyrazolones catalyzed by quinine. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.03.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Hydrogen-Atom Transfer Reactions. Top Curr Chem (Cham) 2016; 374:17. [DOI: 10.1007/s41061-016-0018-2] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 03/01/2016] [Indexed: 02/04/2023]
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Bao X, Wei S, Zou L, He Y, Xue F, Qu J, Wang B. Asymmetric chlorination of 4-substituted pyrazolones catalyzed by natural cinchona alkaloid. Chem Commun (Camb) 2016; 52:11426-11429. [DOI: 10.1039/c6cc06236a] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A natural quinidine catalyzed asymmetric chlorination of 4-substituted pyrazolones was revealed in high yield and excellent enantioselectivity.
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Affiliation(s)
- Xiaoze Bao
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Shiqiang Wei
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Liwei Zou
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Yuli He
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Fuzhao Xue
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
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