1
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Shen YB, Hu F, Li SS. Alkyl amines and ethers as traceless hydride donors in [1,5]-hydride transfer cascade reactions. Org Biomol Chem 2023; 21:700-714. [PMID: 36601772 DOI: 10.1039/d2ob02146c] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The use of alkyl amines and ethers as traceless hydride donors in [1,5]-hydride transfer cascade reactions represents a promising strategy that greatly enriches redox-neutral hydride transfer chemistry. This review summarizes the remarkable progress made in this field, and focuses on (1) alkyl amines as traceless hydride donors in cascade [1,5]-hydride transfer/elimination reactions and (2) alkyl ethers as traceless hydride donors in [1,5]-hydride transfer cascade reactions. The reaction mechanisms, features, scope, limitations, and synthetic applications are included, where appropriate. Importantly, its powerful ability in allene synthesis and the combination with [Re]-vinylidene and carbocation chemistries render this strategy attractive enough to inspire chemists to develop colorful reactions for building molecular complexity.
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Affiliation(s)
- Yao-Bin Shen
- College of Chemistry, Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang 277160, China
| | - Fangzhi Hu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
| | - Shuai-Shuai Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
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2
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Teli S, Teli P, Soni S, Sahiba N, Agarwal S. Synthetic aspects of 1,4- and 1,5-benzodiazepines using o-phenylenediamine: a study of past quinquennial. RSC Adv 2023; 13:3694-3714. [PMID: 36756601 PMCID: PMC9890949 DOI: 10.1039/d2ra06045k] [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: 09/25/2022] [Accepted: 01/09/2023] [Indexed: 01/27/2023] Open
Abstract
Benzodiazepines, seven-membered heterocyclic compounds having two nitrogen atoms at different positions, are ruling scaffolds in the area of pharmaceutical industry. They act as cardinal moieties in organic synthesis as well as in medicinal chemistry. Among the different benzodiazepines, 1,4- and 1,5-benzodiazepines play a far-reaching role in the field of biological activities such as anticonvulsion, anti-anxiety, sedation, and hypnotics. In the past few decades, researchers have conducted a lot of work on these moieties and developed broad, valuable, and significant approaches for their synthesis. In this review article, we recapitulate the systematic synthetic strategies of 1,4- and 1,5-benzodiazepines using o-phenylenediamine as a precursor over the past five years (2018-2022). This article will be helpful for scientists and researchers to examine and explore novel and efficient methods for the synthesis of these biologically active moieties.
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Affiliation(s)
- Sunita Teli
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Pankaj Teli
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Shivani Soni
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Nusrat Sahiba
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Shikha Agarwal
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
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3
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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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4
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Velasco-Rubio Á, Bernárdez R, Varela JA, Saá C. Enantioenriched α-Vinyl 1,4-Benzodiazepines and 1,4-Benzoxazepines via Enantioselective Rhodium-Catalyzed Hydrofunctionalizations of Alkynes and Allenes. J Org Chem 2021; 86:10889-10902. [PMID: 34259003 PMCID: PMC8499028 DOI: 10.1021/acs.joc.1c01268] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
![]()
Benzofused seven-membered heterocycles
such as 1,4-benzo[e]diazepines (1,4-BZDs) and 1,4-benzo[e]oxazepines (1,4-BZOs) were efficiently synthesized by
Rh-catalyzed
hydrofunctionalization of internal alkynes and allenes in good to
excellent yields. The asymmetric hydroamination of (aminomethyl)anilines
gave rise to 3-vinyl-1,4-BZDs with excellent enantioselectivities.
Orthogonal N-deprotection of 1,4-BZDs allowed an
easy entry to an advanced pyrrolobenzodiazepine metabolite of the
V2-receptor antagonist Lixivaptan.
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Affiliation(s)
- Álvaro Velasco-Rubio
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Rodrigo Bernárdez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Jesús A Varela
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Carlos Saá
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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5
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Chen J, Liang E, Shi J, Wu Y, Wen K, Yao X, Tang X. Metal-free synthesis of 1,4-benzodiazepines and quinazolinones from hexafluoroisopropyl 2-aminobenzoates at room temperature. RSC Adv 2021; 11:4966-4970. [PMID: 35424458 PMCID: PMC8694548 DOI: 10.1039/d1ra00324k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 01/20/2021] [Indexed: 11/29/2022] Open
Abstract
Herein, we describe the novel reactivity of hexafluoroisopropyl 2-aminobenzoates. The metal-free synthesis of 1,4-benzodiazepines and quinazolinones from hexafluoroisopropyl 2-aminobenzoates has been developed at room temperature. These procedures feature good functional group tolerance, mild reaction conditions, and excellent yields. The newly formed products can readily be converted to other useful N-heterocycles. Moreover, the products and their derivatives showed potent anticancer activities in vitro by MTT assay. A metal-free synthesis of 1,4-benzodiazepines and quinazolinones from hexafluoroisopropyl 2-aminobenzoates has been developed at room temperature.![]()
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Affiliation(s)
- Jiewen Chen
- Guangdong Provincial Key Laboratory of New Drug Screening
- School of Pharmaceutical Sciences
- Southern Medical University
- Guangzhou 510515
- P. R. China
| | - En Liang
- Guangdong Provincial Key Laboratory of New Drug Screening
- School of Pharmaceutical Sciences
- Southern Medical University
- Guangzhou 510515
- P. R. China
| | - Jie Shi
- Guangdong Provincial Key Laboratory of New Drug Screening
- School of Pharmaceutical Sciences
- Southern Medical University
- Guangzhou 510515
- P. R. China
| | - Yinrong Wu
- Guangdong Provincial Key Laboratory of New Drug Screening
- School of Pharmaceutical Sciences
- Southern Medical University
- Guangzhou 510515
- P. R. China
| | - Kangmei Wen
- Guangdong Provincial Key Laboratory of New Drug Screening
- School of Pharmaceutical Sciences
- Southern Medical University
- Guangzhou 510515
- P. R. China
| | - Xingang Yao
- Guangdong Provincial Key Laboratory of New Drug Screening
- School of Pharmaceutical Sciences
- Southern Medical University
- Guangzhou 510515
- P. R. China
| | - Xiaodong Tang
- Guangdong Provincial Key Laboratory of New Drug Screening
- School of Pharmaceutical Sciences
- Southern Medical University
- Guangzhou 510515
- P. R. China
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6
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An XD, Xiao J. Recent advances in hydride transfer-involved C(sp3)–H activation reactions. Org Chem Front 2021. [DOI: 10.1039/d0qo01502d] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This review summarizes the recent progresses (2016–2020) in the hydride transfer-enabled C(sp3)–H activation according to the reaction types, categorized into the intramolecular/intermolecular C(sp3)–H functionalization, and hydride reduction.
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Affiliation(s)
- Xiao-De An
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Jian Xiao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
- College of Marine Science and Engineering
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7
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Bhowmik A, Das S, Sarkar W, Saidalavi KM, Mishra A, Roy A, Deb I. Diastereoselective Spirocyclization via Intramolecular C(
sp
3
)−H Bond Functionalization Triggered by Sequential [1,5]‐Hydride Shift/Cyclization Process: Approach to Spiro‐tetrahydroquinolines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Arup Bhowmik
- Organic and Medicinal Chemistry Division Indian Institute of Chemical Biology 4-Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
| | - Sumit Das
- Organic and Medicinal Chemistry Division Indian Institute of Chemical Biology 4-Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
- Academy of Scientific and Innovative Research (AcSIR). Kamla Nehru Nagar 201002 Ghaziabad India
| | - Writhabrata Sarkar
- Organic and Medicinal Chemistry Division Indian Institute of Chemical Biology 4-Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
| | - K. M. Saidalavi
- Organic and Medicinal Chemistry Division Indian Institute of Chemical Biology 4-Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
| | - Aniket Mishra
- Organic and Medicinal Chemistry Division Indian Institute of Chemical Biology 4-Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
| | - Anupama Roy
- Organic and Medicinal Chemistry Division Indian Institute of Chemical Biology 4-Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
| | - Indubhusan Deb
- Organic and Medicinal Chemistry Division Indian Institute of Chemical Biology 4-Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
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8
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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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9
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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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10
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Yang X, Hu F, Wang L, Xu L, Li SS. Hydrogen-bonding-assisted redox-neutral construction of tetrahydroquinolines via hydride transfer. Org Biomol Chem 2020; 18:4267-4271. [PMID: 32441733 DOI: 10.1039/d0ob00521e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The hydrogen-bonding-assisted construction of tetrahydroquinolines decorated with structurally diverse 3,3'-difunctional groups has been realized via a hydride transfer-involved three-step cascade reaction in the presence of morpholine. This protocol solves the limitation of acyclic 1,3-dicarbonyl compounds by one-pot synthesis of tetrahydroquinolines, featuring operational simplicity, broadly applicable substrates, and metal- and acid-free conditions with EtOH as a hydrogen-bonding donor.
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Affiliation(s)
- Xiaoyu Yang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
| | - Fangzhi Hu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China. and College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Zhengzhou Rd. #53, Qingdao 266042, P. R. China
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
| | - Shuai-Shuai Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China. and College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Zhengzhou Rd. #53, Qingdao 266042, P. R. China
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11
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Duan WD, Zhang YF, Hu Y. NaH Promoted One-Pot Tandem Reactions of 3-(1-Alkynyl) Chromones to Form 2-Nitrogen-Substituted Xanthones. ACS OMEGA 2020; 5:13454-13461. [PMID: 32548534 PMCID: PMC7288716 DOI: 10.1021/acsomega.0c01930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 05/14/2020] [Indexed: 05/07/2023]
Abstract
A silver-catalyzed dimerization of ethyl isocyanoacetates could trigger the tandem reaction of 3-(1-alkynyl) chromones under the basic condition in a one-pot reaction to afford xanthone skeletons with 2-imidazolyl substitution in an efficient manner. With the control experiment in hand, a mechanism including dimerization of isocyanoacetate/deprotonation/Michael addition/ring-opening/cyclization 1,2-elimination was deduced. Further investigation for the base was carried out, resulting in NaH as an optimal base to avoid the dimerization of 3-(1-alkynyl) chromones. The scope of this methodology was extended on the different substituents of 3-(1-alkynyl)-chromones and the potential of other N-heterocycle glycine ester anions to give the novel functional 2-nitrogen-derived xanthones.
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Affiliation(s)
- Wen-Di Duan
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
- University
of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Yu-Fang Zhang
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
- University
of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Youhong Hu
- State
Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
- University
of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
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12
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Duan K, An XD, Li LF, Sun LL, Qiu B, Li XJ, Xiao J. Hydride Transfer Initiated Redox-Neutral Cascade Cyclizations of Aurones: Facile Access to [6,5] Spirocycles. Org Lett 2020; 22:2537-2541. [PMID: 32186385 DOI: 10.1021/acs.orglett.0c00309] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Reported herein is the hydride transfer initiated redox-neutral cascade cyclizations of aurones, providing a variety of [6,5] spiro-heterocycles in satisfactory yields and good diastereoselectivities.
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Affiliation(s)
- Kang Duan
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xiao-De An
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Long-Fei Li
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Lian-Lian Sun
- The Affiliated Hospital of Huizhou Health Sciences Polytechnic, Huizhou, 516025, China
| | - Bin Qiu
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xian-Jiang Li
- Shandong Kangqiao Biotechnology Co. Ltd., Binzhou, 256500, China
| | - Jian Xiao
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China.,School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
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13
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Shen YB, Wang LX, Sun YM, Dong FY, Yu L, Liu Q, Xiao J. Hexafluoroisopropanol-Mediated Redox-Neutral α-C(sp 3)-H Functionalization of Cyclic Amines via Hydride Transfer. J Org Chem 2020; 85:1915-1926. [PMID: 31823616 DOI: 10.1021/acs.joc.9b02606] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Hexafluoroisopropanol has been demonstrated as the versatile promoter for redox-neutral α-C(sp3)-H functionalization of cyclic amines via the cascade [1,5]-hydride transfer/cyclization strategy. A wide range of cyclic amines are functionalized into bioactive tetrahydroquinolines, quinazolines, benzoxazines, and benzotriazepines in moderate to excellent yields. This protocol features additive-free conditions, operational simplicity, and wide substrate scope.
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Affiliation(s)
| | | | | | | | | | - Qing Liu
- College of Chemical and Environmental Engineering , Shandong University of Science and Technology , Qingdao 266590 , China
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14
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Zhou L, An XD, Yang S, Li XJ, Shao CL, Liu Q, Xiao J. Organocatalytic Cascade β-Functionalization/Aromatization of Pyrrolidines via Double Hydride Transfer. Org Lett 2020; 22:776-780. [DOI: 10.1021/acs.orglett.9b03918] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Lan Zhou
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Xiao-De An
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Shuo Yang
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Xian-Jiang Li
- Shandong Kangqiao Biotechnology Co., Ltd., Binzhou 256500, China
| | - Chang-Lun Shao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Qing Liu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Jian Xiao
- Shandong Province Key Laboratory of Applied Mycology, School of Chemistry and Pharmaceutical Sciences, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
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15
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Duan K, Shi H, Wang LX, Li SS, Xu L, Xiao J. Hydride transfer enabled switchable dearomatization of indoles in the carbocyclic ring and the pyrrole ring. Org Chem Front 2020. [DOI: 10.1039/d0qo00658k] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Hydride transfer enabled the first success of the regioselective dearomatization of indoles in the carbocyclic ring and the pyrrole ring, which was induced by ortho-quinone methides and vinylogous iminium intermediates, respectively.
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Affiliation(s)
- Kang Duan
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Hongjin Shi
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Lin-Xuan Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Shuai-Shuai Li
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Jian Xiao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
- School of Marine Science and Engineering
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16
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Wang S, Shen YB, Li LF, Qiu B, Yu L, Liu Q, Xiao J. N-Alkylation-Initiated Redox-Neutral [5 + 2] Annulation of 3-Alkylindoles with o-Aminobenzaldehydes: Access to Indole-1,2-Fused 1,4-Benzodiazepines. Org Lett 2019; 21:8904-8908. [DOI: 10.1021/acs.orglett.9b03011] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Shuai Wang
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Yao-Bin Shen
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Long-Fei Li
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Bin Qiu
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Liping Yu
- College of Landscape Architecture and Forestry, Qingdao Agricultural University, Qingdao 266109, China
| | - Qing Liu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Jian Xiao
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
- College of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
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17
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Shen YB, Li LF, Xiao MY, Yang JM, Liu Q, Xiao J. Redox-Neutral Cascade Dearomatization of Indoles via Hydride Transfer: Divergent Synthesis of Tetrahydroquinoline-Fused Spiroindolenines. J Org Chem 2019; 84:13935-13947. [DOI: 10.1021/acs.joc.9b02110] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | | | | | | | - Qing Liu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
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18
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An XD, Duan K, Li XJ, Yang JM, Lu YN, Liu Q, Xiao J. Synthesis of Tetrahydro[1,3,4]triazepines via Redox-Neutral α-C(sp3)–H Amination of Cyclic Amines. J Org Chem 2019; 84:11839-11847. [DOI: 10.1021/acs.joc.9b01703] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Xian-Jiang Li
- Shandong Kangqiao Biotechnology Co. Ltd., Binzhou 256500, China
| | | | - Yong-Na Lu
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Qing Liu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
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19
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Zhu S, Chen C, Duan K, Sun YM, Li SS, Liu Q, Xiao J. Cascade [1,5]-Hydride Transfer/Cyclization for Synthesis of [3,4]-Fused Oxindoles. J Org Chem 2019; 84:8440-8448. [PMID: 31135154 DOI: 10.1021/acs.joc.9b00489] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The scandium-catalyzed redox-neutral cascade [1,5]-hydride transfer/cyclization between C4-amine-substituted isatins and 1,3-dicarbonyl compounds has been developed. This protocol enabled the synthesis of tricyclic [3,4]-fused oxindoles in good to high yields and excellent diastereoselectivities, featuring high atom- and step economy as well as good functional group tolerance.
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Affiliation(s)
- Shuai Zhu
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao 266109 , China
| | - Chunqi Chen
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao 266109 , China
| | - Kang Duan
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao 266109 , China
| | - Yun-Ming Sun
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao 266109 , China
| | - Shuai-Shuai Li
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao 266109 , China
| | - Qing Liu
- College of Chemical and Environmental Engineering , Shandong University of Science and Technology , Qingdao 266590 , China
| | - Jian Xiao
- Shandong Province Key Laboratory of Applied Mycology, College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao 266109 , China.,College of Marine Science and Engineering , Qingdao Agricultural University , Qingdao 266109 , China
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20
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Lv X, Hu F, Duan K, Li SS, Liu Q, Xiao J. Aromatization-Driven Cascade [1,5]-Hydride Transfer/Spirocyclization Promoted by Fluorinated Alcohols. J Org Chem 2019; 84:1833-1844. [DOI: 10.1021/acs.joc.8b02754] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Xintong Lv
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Fangzhi Hu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Kang Duan
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Shuai-Shuai Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Qing Liu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Jian Xiao
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
- College of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
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