1
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Wang JL, Wu GY, Luo JN, Liu JL, Zhuo CX. Catalytic Intermolecular Deoxygenative Coupling of Carbonyl Compounds with Alkynes by a Cp*Mo(II)-Catalyst. J Am Chem Soc 2024; 146:5605-5613. [PMID: 38351743 DOI: 10.1021/jacs.3c14195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Carbonyl is highly accessible and acts as an essential functional group in chemical synthesis. However, the direct catalytic deoxygenative functionalization of carbonyl compounds via a putative metal carbene intermediate is a formidable challenge due to the requirement of a high activation energy for the cleavage of strong C═O double bonds. Here, we report a class of bench stable and readily available Cp*Mo(II)-complexes as efficient deoxygenation catalysts that could catalyze the direct intermolecular deoxygenative coupling of carbonyl compounds with alkynes. Enabled by this powerful Cp*Mo(II)-catalyst, various valuable heteroarenes (10 different classes) were obtained in generally good yields and remarkable chemo- and regioselectivities. Mechanistic studies suggested that this reaction might proceed via a sequence of C═O double bonds cleavage, carbene-alkyne metathesis, cyclization, and aromatization processes. This strategy not only provided a general catalytic platform for the rapid preparation of heteroarenes but also opened a new window for the applications of Cp*Mo(II)-catalysts in organic synthesis.
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Affiliation(s)
- Jia-Le Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Guan-Yu Wu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Jian-Nan Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Jun-Long Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Chun-Xiang Zhuo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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2
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Yu YZ, Bai J, Peng JM, Yao JS, Zhuo CX. Modular Access to meta-Substituted Benzenes via Mo-Catalyzed Intermolecular Deoxygenative Benzene Formation. J Am Chem Soc 2023; 145:8781-8787. [PMID: 36929879 DOI: 10.1021/jacs.3c01330] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
The substituted benzene derivatives are essential to organic synthesis, medicinal chemistry, and material science. However, the 1,3-di- and 1,3,5-trisubstituted benzenes are far less prevalent in small-molecule drugs than other substitution patterns, likely due to the lack of robust, efficient, and convenient synthetic methods. Here, we report a Mo-catalyzed intermolecular deoxygenative benzene-forming reaction of readily available ynones and allylic amines. A wide range of unsymmetric and unfunctionalized 1,3-di- and 1,3,5-trisubstituted benzenes were obtained in up to 88% yield by using a commercially available molybdenum catalyst. The synthetic potential of the method was further illustrated by synthetic transformations, a scale-up synthesis, and derivatization of bioactive molecules. Preliminary mechanistic studies suggested that this benzene-forming process might proceed through a Mo-catalyzed aza-Michael addition/[1,5]-hydride shift/cyclization/aromatization cascade. This strategy not only provided a facile, robust, and modular approach to various meta-substituted benzene derivatives but also demonstrated the potential of molybdenum catalysis in the challenging intermolecular deoxygenative cross-coupling reactions.
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Affiliation(s)
- Yi-Zhe Yu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Jin Bai
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Jia-Min Peng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Jia-Sheng Yao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Chun-Xiang Zhuo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.,Shenzhen Research Institute of Xiamen University, Shenzhen 518057, People's Republic of China
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3
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Cao LY, Wang JL, Wang K, Wu JB, Wang DK, Peng JM, Bai J, Zhuo CX. Catalytic Asymmetric Deoxygenative Cyclopropanation Reactions by a Chiral Salen-Mo Catalyst. J Am Chem Soc 2023; 145:2765-2772. [PMID: 36626166 DOI: 10.1021/jacs.2c12225] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The catalytic asymmetric cyclopropanation reaction of alkenes with diazo compounds is a direct and powerful method to construct chiral cyclopropanes that are essential to drug discovery. However, diazo compounds are potentially explosive and often require hazardous reagents for their preparation. Here, we report on the use of 1,2-dicarbonyl compounds as safe and readily available surrogates for diazo compounds in the direct catalytic asymmetric deoxygenative cyclopropanation reaction. Enabled by a class of simple and readily accessible chiral salen-Mo catalysts, the reaction proceeded with generally good enantioselectivities and yields toward a wide range of substrates (80 examples). Preliminary mechanistic studies suggested that the proposed μ-oxo bridged dinuclear Mo(III)-species was the catalytically active species. This strategy not only provides a promising route for the synthesis of chiral cyclopropanes but also opens a new window for the potential applications of chiral salen-Mo complexes in asymmetric catalysis.
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Affiliation(s)
- Li-Ya Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Jia-Le Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Kai Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Jiang-Bin Wu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - De-Ku Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Jia-Min Peng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Jin Bai
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Chun-Xiang Zhuo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
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4
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Banerjee S, Kobayashi T, Takai K, Asako S, Ilies L. Molybdenum-Quinone-Catalyzed Deoxygenative Coupling of Aromatic Carbonyl Compounds. Org Lett 2022; 24:7242-7246. [PMID: 36166349 DOI: 10.1021/acs.orglett.2c03143] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the presence of triphenylphosphine as a mild reductant, the use of catalytic amounts of Mo(CO)6 and an ortho-quinone ligand enables the intermolecular reductive coupling of aromatic aldehydes and the intramolecular coupling of aromatic ketones to produce functionalized alkenes. Diaryl- and diheteroaryl alkenes are synthesized with high (E)-selectivity and a tolerance toward bromide, iodide, and steric hindrance. Intramolecular coupling of dicarbonyl compounds under similar conditions affords mono- and disubstituted phenanthrenes.
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Affiliation(s)
- Somsuvra Banerjee
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Takafumi Kobayashi
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, Okayama 700-8530, Japan
| | - Kazuhiko Takai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, Okayama 700-8530, Japan
| | - Sobi Asako
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, Okayama 700-8530, Japan
| | - Laurean Ilies
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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5
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Dong YQ, Wang K, Zhuo CX. Molybdenum-Catalyzed Intermolecular Deoxygenative Cross-Coupling Reactions of 1,2-Diketones with α-Ketoamides. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuan-Qing Dong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Kai Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Chun-Xiang Zhuo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
- Shenzhen Research Institute of Xiamen University, Shenzhen 518057, P. R. China
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6
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Zhang L, DeMuynck BM, Paneque AN, Rutherford JE, Nagib DA. Carbene reactivity from alkyl and aryl aldehydes. Science 2022; 377:649-654. [PMID: 35926031 PMCID: PMC9439075 DOI: 10.1126/science.abo6443] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Carbenes are highly enabling reactive intermediates that facilitate a diverse range of otherwise inaccessible chemistry, including small-ring formation and insertion into strong σ bonds. To access such valuable reactivity, reagents with high entropic or enthalpic driving forces are often used, including explosive (diazo) or unstable (gem-dihalo) compounds. Here, we report that common aldehydes are readily converted (via stable α-acyloxy halide intermediates) to electronically diverse (donor or neutral) carbenes to facilitate >10 reaction classes. This strategy enables safe reactivity of nonstabilized carbenes from alkyl, aryl, and formyl aldehydes via zinc carbenoids. Earth-abundant metal salts [iron(II) chloride (FeCl2), cobalt(II) chloride (CoCl2), copper(I) chloride (CuCl)] are effective catalysts for these chemoselective carbene additions to σ and π bonds.
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Affiliation(s)
- Lumin Zhang
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
| | - Bethany M DeMuynck
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
| | - Alyson N Paneque
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
| | - Joy E Rutherford
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
| | - David A Nagib
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
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7
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Zhou P, Li Y, XU T. Molybdenum-Catalyzed Cross-Coupling of Benzyl Alcohols: Direct C–OH Bond Transformation via [2 + 2]-Type Addition and Elimination. Org Lett 2022; 24:4218-4223. [DOI: 10.1021/acs.orglett.2c01537] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pan Zhou
- Shanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. of China
| | - Yuqiang Li
- College of Chemistry and Chemical Engineering, Central South University, 932 South Lushan Road, Changsha 410083, P. R. China
| | - Tao XU
- Shanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. of China
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8
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Sahu MK, Jaiswal S, Pattanaik S, Gunanathan C. Base-Catalyzed Traceless Silylation and Deoxygenative Cyclization of Chalcones to Cyclopropanes. J Org Chem 2022; 87:6695-6709. [PMID: 35522975 DOI: 10.1021/acs.joc.2c00374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Development of simple synthetic methods from readily available compounds to complex products is of utmost interest in modern synthesis. Catalytic synthesis of cyclopropanes is important for diverse chemical applications. We present a method for the transformation of readily accessible α,β-unsaturated ketones (chalcones) to cyclopropanes. A simple base, KOH, catalyzed the selective reduction of the enone carbonyl functionality, dehydrogenative silylation, and deoxygenative cyclization of chalcones to provide the cyclopropane products. Chalcones with extended conjugation and 4-chromanone-based substrates also provided the corresponding cyclopropanes. One-pot synthesis of cyclopropanes directly from industrial feedstock compounds such as ketones and aldehydes is also demonstrated using catalytic KOH for both intermolecular condensation and dehydrogenative silylation-deoxygenative intramolecular cyclization cascade.
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Affiliation(s)
- Manas Kumar Sahu
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
| | - Shubham Jaiswal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
| | - Sandip Pattanaik
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
| | - Chidambaram Gunanathan
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
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9
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He Y, Huang Z, Wu K, Ma J, Zhou YG, Yu Z. Recent advances in transition-metal-catalyzed carbene insertion to C-H bonds. Chem Soc Rev 2022; 51:2759-2852. [PMID: 35297455 DOI: 10.1039/d1cs00895a] [Citation(s) in RCA: 82] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
C-H functionalization has been emerging as a powerful method to establish carbon-carbon and carbon-heteroatom bonds. Many efforts have been devoted to transition-metal-catalyzed direct transformations of C-H bonds. Metal carbenes generated in situ from transition-metal compounds and diazo or its equivalents are usually applied as the transient reactive intermediates to furnish a catalytic cycle for new C-C and C-X bond formation. Using this strategy compounds from unactivated simple alkanes to complex molecules can be further functionalized or transformed to multi-functionalized compounds. In this area, transition-metal-catalyzed carbene insertion to C-H bonds has been paid continuous attention. Diverse catalyst design strategies, synthetic methods, and potential applications have been developed. This critical review will summarize the advance in transition-metal-catalyzed carbene insertion to C-H bonds dated up to July 2021, by the categories of C-H bonds from aliphatic C(sp3)-H, aryl (aromatic) C(sp2)-H, heteroaryl (heteroaromatic) C(sp2)-H bonds, alkenyl C(sp2)-H, and alkynyl C(sp)-H, as well as asymmetric carbene insertion to C-H bonds, and more coverage will be given to the recent work. Due to the rapid development of the C-H functionalization area, future directions in this topic are also discussed. This review will give the authors an overview of carbene insertion chemistry in C-H functionalization with focus on the catalytic systems and synthetic applications in C-C bond formation.
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Affiliation(s)
- Yuan He
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China. .,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zilong Huang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China. .,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Kaikai Wu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China.
| | - Juan Ma
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China. .,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yong-Gui Zhou
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China.
| | - Zhengkun Yu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China. .,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, P. R. China.,Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, P. R. China
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10
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Okada K, Ueda H, Tokuyama H. Total synthesis of (±)-vinoxine: construction of the bridged pyrido[1,2- a]indole skeleton via Tf 2O-mediated Bischler-Napieralski reaction and stereoselective radical cyclization. Org Biomol Chem 2022; 20:5943-5947. [PMID: 35262132 DOI: 10.1039/d2ob00274d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The total synthesis of (±)-vinoxine was achieved featuring the assembly of a multi-substituted tetrahydropyrido[1,2-a]indole skeleton through the Tf2O-mediated Bischler-Napieralski reaction. The characteristic diazabicyclo[3.3.1]nonane skeleton was stereoselectively constructed via radical cyclization based on the one stereochemistry of the C3 position. The established methodology provides new options for the synthesis of natural products and pharmaceuticals containing the multi-substituted pyrido[1,2-a]indole skeleton.
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Affiliation(s)
- Kosuke Okada
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan.
| | - Hirofumi Ueda
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan.
| | - Hidetoshi Tokuyama
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba 6-3, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan.
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11
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Li DK, Zhang B, Ye Q, Deng W, Xu ZY. Synthesis of Indenones Via Palladium-Catalyzed Carbonylation with Mo(CO)6 as a CO Surrogate. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00693] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dong-Kun Li
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Bo Zhang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Qi Ye
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Wei Deng
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Zheng-Yang Xu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China
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12
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Li J, Huang C, Li C. Deoxygenative Functionalizations of Aldehydes, Ketones and Carboxylic Acids. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jianbin Li
- Department of Chemistry FRQNT Centre for Green Chemistry and Catalysis McGill University 801 Sherbrooke St. W. Montreal Quebec H3A 0B8 Canada
| | - Chia‐Yu Huang
- Department of Chemistry FRQNT Centre for Green Chemistry and Catalysis McGill University 801 Sherbrooke St. W. Montreal Quebec H3A 0B8 Canada
| | - Chao‐Jun Li
- Department of Chemistry FRQNT Centre for Green Chemistry and Catalysis McGill University 801 Sherbrooke St. W. Montreal Quebec H3A 0B8 Canada
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13
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Yang S, An XD, Qiu B, Liu RB, Xiao J. Access to Polycyclic Indole-3,4-Fused Nine-Membered Ring via Cascade 1,6-Hydride Transfer/Cyclization. Org Lett 2021; 23:9100-9105. [PMID: 34766504 DOI: 10.1021/acs.orglett.1c03389] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A cascade aldimine condensation/1,6-hydride transfer/Mannich-type cyclization of indole-derived phenylenediamine with aldehydes was developed for one-step construction of a polycyclic indole-3,4-fused skeleton. Aldehyde serves as a key to start the whole process, including 1,6-hydride transfer enabled δ-C(sp3)-H activation of the secondary amine. The challenges of construction of medium-sized rings are addressed via hydride transfer chemistry.
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Affiliation(s)
- Shuo Yang
- 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
| | - Bin Qiu
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Rui-Bin Liu
- 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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14
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Li J, Li CJ, Huang CY. Deoxygenative Functionalizations of Aldehydes, Ketones and Carboxylic Acids. Angew Chem Int Ed Engl 2021; 61:e202112770. [PMID: 34780098 DOI: 10.1002/anie.202112770] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Indexed: 11/12/2022]
Abstract
Conversion of carbonyl compounds, including aldehydes, ketones and carboxylic acids, into functionalized alkanes via deoxygenation would be highly desirable from a sustainability perspective and very enabling in chemical synthesis. This review covers the recent methodology development in carbonyl and carboxyl deoxygenative functionalizations, highlighting some typical and significant contributions in this field. These advances will be categorized based on types of bond formation, and in each part, selected examples will be discussed from their generalized mechanistic perspectives. Four summarized reactivity modes of aldehydes and ketones during the deoxygenation, namely, bis-electrophile, carbenoid, bis-nucleophile and alkyl radical, are presented, while the carboxylic acids are deoxygenated mainly via activated carbonyl or acetal intermediates.
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Affiliation(s)
| | - Chao-Jun Li
- McGill University, Chemistry, 801 Sherbrooke St. West, H3A0B8, Montreal, CANADA
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15
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Shelke YG, Hande PE, Gharpure SJ. Recent advances in the synthesis of pyrrolo[1,2- a]indoles and their derivatives. Org Biomol Chem 2021; 19:7544-7574. [PMID: 34524330 DOI: 10.1039/d1ob01103k] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The pyrrolo[1,2-a]indole unit is a privileged heterocycle found in numerous natural products and has been shown to exhibit diverse pharmacological properties. Thus, recent years have witnessed immense interest from the synthesis community on the synthesis of this scaffold. In light of the ever-increasing demand for pyrrolo[1,2-a]indoles in drug discovery, this review provides an overview of recent synthesis methods for the preparation of pyrrolo[1,2-a]indoles and their derivatives. The mechanistic pathway and stereo-electronic factors affecting the yield and selectivity of the product are briefly explained. Furthermore, we have attempted to demonstrate the utility of the developed methods in the synthesis of bioactive molecules and natural products, wherever offered.
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Affiliation(s)
- Yogesh G Shelke
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Pankaj E Hande
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Santosh J Gharpure
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
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16
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Cao L, Luo J, Yao J, Wang D, Dong Y, Zheng C, Zhuo C. Molybdenum‐Catalyzed Deoxygenative Cyclopropanation of 1,2‐Dicarbonyl or Monocarbonyl Compounds. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Li‐Ya Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
| | - Jian‐Nan Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
| | - Jia‐Sheng Yao
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
| | - De‐Ku Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
| | - Yuan‐Qing Dong
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 P. R. China
| | - Chun‐Xiang Zhuo
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
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17
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Cao LY, Luo JN, Yao JS, Wang DK, Dong YQ, Zheng C, Zhuo CX. Molybdenum-Catalyzed Deoxygenative Cyclopropanation of 1,2-Dicarbonyl or Monocarbonyl Compounds. Angew Chem Int Ed Engl 2021; 60:15254-15259. [PMID: 33901340 DOI: 10.1002/anie.202103429] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/21/2021] [Indexed: 12/26/2022]
Abstract
The transition-metal-catalyzed cyclopropanation of alkenes by the decomposition of diazo compounds is a powerful and straightforward strategy to produce cyclopropanes, but is tempered by the potentially explosive nature of diazo substrates. Herein we report the Mo-catalyzed regiospecific deoxygenative cyclopropanation of readily available and bench-stable 1,2-dicarbonyl compounds, in which one of the two carbonyl groups acts as a carbene equivalent upon deoxygenation and engages in the subsequent cyclopropanation process. The use of a commercially available Mo catalyst afforded an array of valuable cyclopropanes with exclusive regioselectivity in up to 90 % yield. The synthetic utility of this method was further demonstrated by gram-scale syntheses, late-stage functionalization, and the cyclopropanation of a simple monocarbonyl compound. Preliminary mechanistic studies suggest that phosphine (or silane) acts as both a mild reductant and a good oxygen acceptor that efficiently regenerates the catalytically active Mo catalyst through reduction of the Mo-oxo complexes.
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Affiliation(s)
- Li-Ya Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Jian-Nan Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Jia-Sheng Yao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - De-Ku Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Yuan-Qing Dong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, P. R. China
| | - Chun-Xiang Zhuo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China
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18
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Chen W, Seidel D. α-C-H/N-H Annulation of Alicyclic Amines via Transient Imines: Preparation of Polycyclic Lactams. Org Lett 2021; 23:3729-3734. [PMID: 33881883 PMCID: PMC8175037 DOI: 10.1021/acs.orglett.1c01125] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Polycyclic lactams are prepared in a single operation from o-toluamides and cyclic amines in a process that involves transient cyclic imines, species that are conveniently obtained in situ from the corresponding lithium amides and simple ketone oxidants. Imines thus generated, such as 1-pyrroline and 1-piperideine, engage lithiated o-toluamides in a facile annulation process. Undesired side reactions such as imine deprotonation and o-toluamide dimerization are suppressed through the judicious choice of reaction conditions.
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Affiliation(s)
- Weijie Chen
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida, 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida, 32611, United States
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19
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Asako S, Kobayashi T, Ishihara S, Takai K. Molybdenum‐Catalyzed Deoxygenative Cyclization of Carbonyl Compounds for the Synthesis of Pyrido[2,1‐
a
]isoindoles. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100038] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Sobi Asako
- Division of Applied Chemistry, Graduate School of Natural Science and Technology Okayama University 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
- RIKEN Center for Sustainable Resource Science 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Takafumi Kobayashi
- Division of Applied Chemistry, Graduate School of Natural Science and Technology Okayama University 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
| | - Seina Ishihara
- Division of Applied Chemistry, Graduate School of Natural Science and Technology Okayama University 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
| | - Kazuhiko Takai
- Division of Applied Chemistry, Graduate School of Natural Science and Technology Okayama University 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
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20
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Kim JH, Paul A, Ghiviriga I, Seidel D. α-C-H Bond Functionalization of Unprotected Alicyclic Amines: Lewis-Acid-Promoted Addition of Enolates to Transient Imines. Org Lett 2021; 23:797-801. [PMID: 33464093 PMCID: PMC7924990 DOI: 10.1021/acs.orglett.0c04024] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Enolizable cyclic imines, obtained in situ from their corresponding lithium amides by oxidation with simple ketone oxidants, are readily alkylated with a range of enolates to provide mono- and polycyclic β-aminoketones in a single operation, including the natural product (±)-myrtine. Nitrile anions also serve as competent nucleophiles in these transformations, which are promoted by BF3 etherate. β-Aminoesters derived from ester enolates can be converted to the corresponding β-lactams.
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Affiliation(s)
- Jae Hyun Kim
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center for NMR Spectroscopy, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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21
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Paul A, Kim JH, Daniel SD, Seidel D. Diversification of Unprotected Alicyclic Amines by C-H Bond Functionalization: Decarboxylative Alkylation of Transient Imines. Angew Chem Int Ed Engl 2021; 60:1625-1628. [PMID: 32975859 PMCID: PMC7854982 DOI: 10.1002/anie.202011641] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/24/2020] [Indexed: 12/13/2022]
Abstract
Despite extensive efforts by many practitioners in the field, methods for the direct α-C-H bond functionalization of unprotected alicyclic amines remain rare. A new advance in this area utilizes N-lithiated alicyclic amines. These readily accessible intermediates are converted to transient imines through the action of a simple ketone oxidant, followed by alkylation with a β-ketoacid under mild conditions to provide valuable β-amino ketones with unprecedented ease. Regioselective α'-alkylation is achieved for substrates with existing α-substituents. The method is further applicable to the convenient one-pot synthesis of polycyclic dihydroquinolones through the incorporation of a SN Ar step.
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Affiliation(s)
- Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Jae Hyun Kim
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
- Current address: College of Pharmacy, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Scott D Daniel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
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22
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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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23
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Abstract
Amines such as 1,2,3,4-tetrahydroisoquinoline undergo redox-neutral annulations with ortho-(nitromethyl)benzaldehyde. Benzoic acid acts as a promoter in these reactions, which involve concurrent amine α-C-H bond and N-H bond functionalization. Subsequent removal of the nitro group provides access to tetrahydroprotoberberines not accessible via typical redox-annulations. Also reported are decarboxylative annulations of ortho-(nitromethyl)benzaldehyde with proline and pipecolic acid.
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Affiliation(s)
- Dillon R L Rickertsen
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA
| | - Longle Ma
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA
| | - Khalil A Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA
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24
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Paul A, Kim JH, Daniel SD, Seidel D. Diversification of Unprotected Alicyclic Amines by C−H Bond Functionalization: Decarboxylative Alkylation of Transient Imines. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry University of Florida Gainesville FL 32611 USA
| | - Jae Hyun Kim
- Center for Heterocyclic Compounds, Department of Chemistry University of Florida Gainesville FL 32611 USA
- Current address: College of Pharmacy Kangwon National University Chuncheon 24341 Republic of Korea
| | - Scott D. Daniel
- Center for Heterocyclic Compounds, Department of Chemistry University of Florida Gainesville FL 32611 USA
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry University of Florida Gainesville FL 32611 USA
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25
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Shi L, Li P, Guo MG, Gao T. Reaction mechanisms and topological analyses for the C H activation of ethylene by uranium atom using density functional theory. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.113022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Yan Q, Huang H, Zhang H, Li MH, Yang D, Song MP, Niu JL. Synthesis of 7-Amido Indolines by Cp*Co(III)-Catalyzed C–H Bond Amidation. J Org Chem 2020; 85:11190-11199. [DOI: 10.1021/acs.joc.0c01259] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Qingkai Yan
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - He Zhang
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Meng-Hui Li
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Dandan Yang
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Mao-Ping Song
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Jun-Long Niu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
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27
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Paul A, Chandak HS, Ma L, Seidel D. Redox-Annulations of Cyclic Amines with ortho-Cyanomethylbenzaldehydes. Org Lett 2020; 22:976-980. [PMID: 31984752 DOI: 10.1021/acs.orglett.9b04506] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Amines such as 1,2,3,4-tetrahydroisoquinoline undergo redox-neutral annulations with ortho-cyanomethylbenzaldehydes. These amine α-C-H bond functionalization reactions are promoted by acetic acid. The resulting β-aminonitriles can be converted to the corresponding β-aminoalcohols in diastereoselective fashion.
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Affiliation(s)
- Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry , University of Florida , Gainesville , Florida 32611 , United States.,Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Hemant S Chandak
- Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Longle Ma
- Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry , University of Florida , Gainesville , Florida 32611 , United States.,Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , Piscataway , New Jersey 08854 , United States
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28
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Gao X, Li C, Yuan Y, Xie X, Zhang Z. Visible-light-induced intramolecular radical cascade of α-bromo-N-benzyl-alkylamides: a new strategy to synthesize tetracyclic N-fused indolo[2,1-a]isoquinolin-6(5H)-ones. Org Biomol Chem 2020; 18:263-271. [PMID: 31829389 DOI: 10.1039/c9ob02294e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Polycyclic indole scaffolds are ubiquitous in pharmaceuticals and natural products and in materials science. Here, we present a visible-light-initiated intramolecular aryl migration/desulfonylation/cyclization cascade reaction for the synthesis of tetracyclic indolo[2,1-a]isoquinolin-6(5H)-ones. This protocol not only exhibited a wide substrate scope but also provided a mild route to access a variety of tetracyclic N-fused indoles.
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Affiliation(s)
- Xiaoshuang Gao
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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29
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Kaldhi D, Gujjarappa R, Vodnala N, Kabi AK, Aljaar N, Malakar CC. Mo(VI)-catalyzed Synthesis of 2-Aryl-2 H-indazoles Using Pinacol Mediated Deoxygenation of Nitroaromatics. CHEM LETT 2019. [DOI: 10.1246/cl.190490] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Dhananjaya Kaldhi
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal – 795004, Manipur, India
| | - Raghuram Gujjarappa
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal – 795004, Manipur, India
| | - Nagaraju Vodnala
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal – 795004, Manipur, India
| | - Arup K. Kabi
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal – 795004, Manipur, India
| | - Nayyef Aljaar
- Chemistry Department, the Hashemite University, P. O. Box 150459, Zarqa 13115, Jordan
| | - Chandi C. Malakar
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal – 795004, Manipur, India
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30
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Yuan C, Dai P, Bao X, Zhao Y. Highly Site-Selective Formation of Perfluoroalkylated Anilids via a Protecting Strategy by Molybdenum Hexacarbonyl Catalyst. Org Lett 2019; 21:6481-6484. [DOI: 10.1021/acs.orglett.9b02362] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Chunchen Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Ping Dai
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xiaoguang Bao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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