1
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Du Y, Li Q, Wang T, Wang YQ. Enantioselective Synthesis of Biphenyl-Bridged ϵ-Sultams by Organocatalytic Mannich Reactions of Cyclic N-Sulfonylimines with Unactivated Ketones. Chemistry 2024; 30:e202302904. [PMID: 37936501 DOI: 10.1002/chem.202302904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/09/2023]
Abstract
A highly enantioselective Mannich reaction of biphenyl-bridged seven-membered cyclic N-sulfonylimines with methyl alkyl ketones is disclosed in this study. The reaction was performed under organocatalysis by using a quinine-derived primary amine as the catalyst in combination with a Brønsted acid as the co-catalyst. High yields (up to 89 %) and excellent enantioselectivities (up to 97 % ee) were observed. For methyl alkyl ketones containing a larger alkyl substituent, specific regioselective addition to the C=N bond is favored at the methyl group. On the contrary, ketones containing a smaller alkyl substituent or hydroxyacetone substrates gave major syn selective Mannich products at the methylene group.
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Affiliation(s)
- Ying Du
- Key Laboratory of Natural Medicine and, Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Qian Li
- Key Laboratory of Natural Medicine and, Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Tao Wang
- Key Laboratory of Natural Medicine and, Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - You-Qing Wang
- Key Laboratory of Natural Medicine and, Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
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2
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Synthesis of 5,6-Dihydrophenanthridines via Palladium-Catalyzed Intramolecular Dehydrogenative Coupling of Two Aryl C−H Bonds. Molecules 2023; 28:molecules28062498. [PMID: 36985470 PMCID: PMC10055664 DOI: 10.3390/molecules28062498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/04/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
5,6-Dihydrophenanthridines are common aza heterocycle frameworks of natural products and pharmaceuticals. Herein, we reported the first palladium-catalyzed intramolecular C−H/C−H dehydrogenative coupling reaction of two simple arenes to generate 5,6-dihydrophenanthridines. The approach features a broad substrate scope and good tolerance of functional groups, offering an efficient alternative synthesis route for important 5,6-dihydrophenanthridine compounds.
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3
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Chen X, Pei C, Liu B, Li J, Zou D, Wu Y, Wu Y. Copper-assisted trifluoromethylthiolation/radical cascade cyclization of alkynes to construct SCF 3-containing dioxodibenzothiazepines. Chem Commun (Camb) 2022; 58:8674-8677. [PMID: 35822922 DOI: 10.1039/d2cc02171d] [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
A mild and efficient Cu-assisted trifluoromethylthiolation/radical cascade cyclization of alkynes with readily available and stable AgSCF3 as the trifluoromethylthiolating reagent has been disclosed. This transformation provides an opportunity to construct a series of potential medicinally valuable trifluoromethylthio-substituted dioxodibenzothiazepines with wide functional group compatibility. This protocol opens up a new avenue for the construction of useful trifluoromethylthiolated seven-membered N-heterocycles.
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Affiliation(s)
- Xiaoyu Chen
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Congcong Pei
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Bo Liu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Jingya Li
- Tetranov Biopharm, LLC., Zhengzhou, 450052, People's Republic of China
| | - Dapeng Zou
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Yangjie Wu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Yusheng Wu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China. .,Tetranov International, Inc., 100 Jersey Avenue, Suite A340, New Brunswick, NJ, 08901, USA.
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4
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Zheng X, Shen Q, Yin C, Li L, Zhong T, Yu C. Photoinduced Three‐Component Difluoroamidosulfonylation/Bicyclization: Regioselectivity Synthesis of Seven‐Membered Dibenzosultams. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Xiangyun Zheng
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Qitao Shen
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Chuanliu Yin
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Lianghao Li
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Tianshuo Zhong
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Chuanming Yu
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
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5
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Laha JK, Gupta P. Sulfoxylate Anion Radical-Induced Aryl Radical Generation and Intramolecular Arylation for the Synthesis of Biarylsultams. J Org Chem 2022; 87:4204-4214. [PMID: 35245054 DOI: 10.1021/acs.joc.1c03031] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Aryl radical generation from the corresponding aryl halides using an electron donor and subsequent intramolecular cyclization with arenes could be an important advancement in contemporary biaryl synthesis. A green and practically useful synthetic protocol to access diverse six- and seven-membered biarylsultams especially with a free NH group including demonstration of a gram-scale synthesis is reported herein. The sulfoxylate anion radical (SO2-•), generated in situ from the reagents rongalite or sodium dithionite (Na2S2O4), was found to be the key single electron transfer agent forming aryl radicals from aryl halides, which upon intramolecular arylation gives biarylsultams with good to excellent yields. The approach features generation of aryl radicals that remained underexplored, use of a cheap and readily available industrial reagents, and transition metal-free, mild, and green reaction conditions.
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Affiliation(s)
- Joydev K Laha
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Pankaj Gupta
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
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6
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Xiao Q, Lu M, Deng Y, Jian JX, Tong QX, Zhong JJ. Photoinduced Radical Cascade Cyclization: A Metal-Free Approach to Access Difluoroalkylated Dioxodibenzothiazepines. Org Lett 2021; 23:9303-9308. [PMID: 34806891 DOI: 10.1021/acs.orglett.1c03700] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A simple and mild photoredox catalytic approach to access difluoroalkylated dioxodibenzothiazepines in high regioselectivity via radical cascade cyclization has been described herein. In contrast to previous methods, this strategy does not involve the use of transition-metal catalysts and avoids the potential disadvantages of inevitable toxicity and the tedious removal process of metal catalysts. The commercially available and inexpensive CF2 precursors, wide substrate scope, and mild reaction conditions demonstrate the practicability of this approach.
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Affiliation(s)
- Qian Xiao
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University and Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, Guangdong 515063, P. R. China.,School of Chemistry and Environmental Engineering, Hanshan Normal University, Chaozhou, Guangdong 521041, P. R. China
| | - Maojian Lu
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University and Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, Guangdong 515063, P. R. China
| | - Yinglan Deng
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University and Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, Guangdong 515063, P. R. China
| | - Jing-Xin Jian
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University and Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, Guangdong 515063, P. R. China
| | - Qing-Xiao Tong
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University and Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, Guangdong 515063, P. R. China
| | - Jian-Ji Zhong
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University and Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, Guangdong 515063, P. R. China
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7
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Zhang ZQ, Xu YH, Dai JC, Li Y, Sheng J, Wang XS. Copper-Catalyzed Trifluoromethylation/Cyclization of Alkynes for Synthesis of Dioxodibenzothiazepines. Org Lett 2021; 23:2194-2198. [PMID: 33635668 DOI: 10.1021/acs.orglett.1c00344] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A facile and efficient approach for the synthesis of the CF3-containing dioxodibenzothiazepines has been developed via copper-catalyzed trifluoromethylation/cyclization of alkynes utilizing a radical relay strategy. This method has demonstrated low catalyst loading, high regiocontrol, and broad scope under mild conditions. Good compatibility for the N-protecting group, gram-scale experiment, and further derivation of product prove the versatility of this transformation.
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Affiliation(s)
- Zi-Qi Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Yi-Hao Xu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Jing-Cheng Dai
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Yan Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Jie Sheng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
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8
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Yang P, Zhang L, Fu K, Sun Y, Wang X, Yue J, Ma Y, Tang B. Nickel-Catalyzed Asymmetric Transfer Hydrogenation and α-Selective Deuteration of N-Sulfonyl Imines with Alcohols: Access to α-Deuterated Chiral Amines. Org Lett 2020; 22:8278-8284. [PMID: 33044081 DOI: 10.1021/acs.orglett.0c02921] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A nickel-catalyzed enantioselective transfer hydrogenation and deuteration of N-sulfonyl imines was developed. Excellent α-selectivity and high deuterium content were achieved by using inexpensive 2-propanol-d8 as a deuterium source. As a highlight, no deuteration of β-C-H and the remote C-H of N-sulfonyl amines occurred, which is hard to achieve using other imines or by hydrogen isotope exchange with D2O. Mechanism studies indicated a stepwise pathway through the [Ni-D] intermediate.
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Affiliation(s)
- Peng Yang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Li Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Kaiyue Fu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Yaxin Sun
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Xiuhua Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Jieyu Yue
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Yu Ma
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
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9
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Palladium catalyzed annulation of benzylamines and arynes via C–H activation to construct 5,6-dihydrophenanthridine derivatives. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.05.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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10
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Zhao ZB, Shi L, Meng FJ, Li Y, Zhou YG. Synthesis of chiral seven-membered cyclic sulfonamides through palladium-catalyzed arylation of cyclic imines. Org Chem Front 2019. [DOI: 10.1039/c8qo01323c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
An enantioselective palladium-catalyzed addition of arylboronic acids to seven-membered cyclic N-sulfonyl aldimines and ketimines has been developed, giving the chiral cyclic sulfonamides with excellent yields and up to 99% ee.
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Affiliation(s)
- Zi-Biao Zhao
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Lei Shi
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Fan-Jie Meng
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Yaming Li
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Yong-Gui Zhou
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- P. R. China
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11
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Laha JK, Manral N, Hunjan MK. Palladium-catalysed regioselective N-arylation of anthranilamides: a tandem route for dibenzodiazepinone synthesis. NEW J CHEM 2019. [DOI: 10.1039/c9nj00539k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A palladium-catalyzed tandem reaction of 2-aminobenzamide and 1,2-dihaloarenes for the synthesis of dibenzodiazepinone via double N-arylations (inter and intra-molecular) has been achieved.
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Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- S. A. S. Nagar
- India
| | - Neelam Manral
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- S. A. S. Nagar
- India
| | - Mandeep Kaur Hunjan
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- S. A. S. Nagar
- India
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12
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Zhao X, Xu H, Huang X, Zhou JS. Asymmetric Stepwise Reductive Amination of Sulfonamides, Sulfamates, and a Phosphinamide by Nickel Catalysis. Angew Chem Int Ed Engl 2018; 58:292-296. [DOI: 10.1002/anie.201809930] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/12/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Xiaohu Zhao
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link, SPMS-CBC-06-06 Singapore 637371 Singapore
| | - Haiyan Xu
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link, SPMS-CBC-06-06 Singapore 637371 Singapore
| | - Xiaolei Huang
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link, SPMS-CBC-06-06 Singapore 637371 Singapore
| | - Jianrong Steve Zhou
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link, SPMS-CBC-06-06 Singapore 637371 Singapore
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13
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Zhao X, Xu H, Huang X, Zhou JS. Asymmetric Stepwise Reductive Amination of Sulfonamides, Sulfamates, and a Phosphinamide by Nickel Catalysis. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809930] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Xiaohu Zhao
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link, SPMS-CBC-06-06 Singapore 637371 Singapore
| | - Haiyan Xu
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link, SPMS-CBC-06-06 Singapore 637371 Singapore
| | - Xiaolei Huang
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link, SPMS-CBC-06-06 Singapore 637371 Singapore
| | - Jianrong Steve Zhou
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link, SPMS-CBC-06-06 Singapore 637371 Singapore
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14
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Boichenko MA, Chagarovskiy AO. Recent achievements in the synthesis of dibenz[c,e]azepines (microreview). Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2207-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Affiliation(s)
- Sudarshan Debnath
- Department of Chemistry; Syamsundar College; 713424 Shyamsundar India
| | - Shovan Mondal
- Department of Chemistry; Syamsundar College; 713424 Shyamsundar India
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16
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Balgobin SMC, Brookes DJ, Jiang J, Pritchard RG, Wallace TW. Axial stereocontrol in tropos dibenz[c,e]azepines: the individual and cooperative effects of alkyl substituents. Org Biomol Chem 2017; 15:10184-10199. [PMID: 29177299 DOI: 10.1039/c7ob02385e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
6,7-Dihydro-5H-dibenz[c,e]azepines, a class of secondary amine incorporating a centre-axis chirality relay, can be prepared from N-(2-bromobenzyl)-N-(1-arylalkyl)methanesulfonamides via Pd-catalysed intramolecular direct arylation, and methylated at C(7) via the 5,7-trans diastereoselective addition of methylmagnesium bromide to the derived N-benzylazepinium tetraphenylborate. Using these methods, the 4,5-dimethylated and 4,5,7-trimethylated homologues 13 and 14 were obtained and shown by 1H NMR spectroscopy to be axially biased in opposite senses, as defined by the respective pseudoaxial or pseudoequatorial orientation of the 5-substituent in the preferred conformers, while retaining their tropos nature (the Arrhenius activation energy, EA, for the conformational exchange process in 14 was estimated to be 57 kJ mol-1 using 2D-EXSY NMR spectroscopy at 233-248 K). These results serve to illustrate how substituent effects might be exploited in new designs of bridged biaryl ligand in which tropos dynamics operate in combination with a pre-existing axial stereochemical bias.
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Affiliation(s)
- Sinead M C Balgobin
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
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17
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Laha JK, Jethava KP, Tummalapalli KSS, Sharma S. Synthesis of Mono-N
-sulfonylimidazolidines by a 1,3-Dipolar Cycloaddition Strategy, as an Alternative to Selective N
-Sulfonylation, and Their Ring Cleavage To Afford 1,2-Diamines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700654] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry); National Institute of Pharmaceutical Education and Research; 160062 S. A. S. Nagar Punjab India
| | - Krupal P. Jethava
- Department of Pharmaceutical Technology (Process Chemistry); National Institute of Pharmaceutical Education and Research; 160062 S. A. S. Nagar Punjab India
| | - K. S. Satyanarayana Tummalapalli
- Department of Pharmaceutical Technology (Process Chemistry); National Institute of Pharmaceutical Education and Research; 160062 S. A. S. Nagar Punjab India
| | - Sheetal Sharma
- Department of Pharmaceutical Technology (Process Chemistry); National Institute of Pharmaceutical Education and Research; 160062 S. A. S. Nagar Punjab India
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18
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Rafiee F. Synthesis of phenanthridine and phenanthridinone derivatives based on Pd-catalyzed C-H activation. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3820] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Fatemeh Rafiee
- Department of Chemistry, Faculty of physic-chemistry; Alzahra University; Vanak Tehran Iran
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19
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Yang Z, Chen F, Zhang S, He Y, Yang N, Fan QH. Ruthenium-Catalyzed Enantioselective Hydrogenation of Phenanthridine Derivatives. Org Lett 2017; 19:1458-1461. [DOI: 10.1021/acs.orglett.7b00419] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhusheng Yang
- Key
Laboratory of Environmentally Friendly Chemistry of the Ministry of
Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, P. R. China
- CAS
Key Laboratory of Molecular Recognition and Function, Institute of
Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Fei Chen
- CAS
Key Laboratory of Molecular Recognition and Function, Institute of
Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Shuxin Zhang
- CAS
Key Laboratory of Molecular Recognition and Function, Institute of
Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yanmei He
- CAS
Key Laboratory of Molecular Recognition and Function, Institute of
Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Nianfa Yang
- Key
Laboratory of Environmentally Friendly Chemistry of the Ministry of
Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, P. R. China
| | - Qing-Hua Fan
- CAS
Key Laboratory of Molecular Recognition and Function, Institute of
Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing 100190, P. R. China
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20
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Laha JK, Patel KV, Dubey G, Jethava KP. Intramolecular Minisci acylation under silver-free neutral conditions for the synthesis of azafluorenones and fluorenones. Org Biomol Chem 2017; 15:2199-2210. [DOI: 10.1039/c7ob00077d] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
An intramolecular Minisci acylation under silver-free neutral conditions providing access to azafluorenones and fluorenones has been developed.
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Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
| | - Ketul V. Patel
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
| | - Gurudutt Dubey
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
| | - Krupal P. Jethava
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
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21
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Rabie R, Hammouda MM, Elattar KM. Cesium carbonate as a mediated inorganic base in some organic transformations. RESEARCH ON CHEMICAL INTERMEDIATES 2016. [DOI: 10.1007/s11164-016-2744-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Laha JK, Satyanarayana Tummalapalli KS, Jethava KP. Implications of dynamic imine chemistry for the sustainable synthesis of nitrogen heterocycles via transimination followed by intramolecular cyclisation. Org Biomol Chem 2016; 14:2473-9. [DOI: 10.1039/c5ob02670a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
An application of dynamic imine chemistry to the sustainable synthesis of N-heterocycles from N-aryl benzylamines or imines and ortho-substituted anilines is described.
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Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- S. A. S. Nagar
- India
| | - K. S. Satyanarayana Tummalapalli
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- S. A. S. Nagar
- India
| | - Krupal P. Jethava
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- S. A. S. Nagar
- India
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23
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Laha JK, Patel KV, Tummalapalli KSS, Dayal N. Formation of amides, their intramolecular reactions for the synthesis of N-heterocycles, and preparation of a marketed drug, sildenafil: a comprehensive coverage. Chem Commun (Camb) 2016; 52:10245-8. [DOI: 10.1039/c6cc04259g] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A comprehensive package including new amide formation, their intramolecular reactions for the synthesis of diverse nitrogen heterocycles, and preparation of a marketed drug is described.
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Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- S. A. S. Nagar
- India
| | - Ketul V. Patel
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- S. A. S. Nagar
- India
| | - K. S. Satyanarayana Tummalapalli
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- S. A. S. Nagar
- India
| | - Neetu Dayal
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- S. A. S. Nagar
- India
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24
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Laha JK, Sharma S, Dayal N. Palladium-Catalyzed Regio- and Chemoselective Reactions of 2-Bromobenzyl Bromides: Expanding the Scope for the Synthesis of Biaryls Fused to a Seven-Membered Sultam. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501032] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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25
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Laha JK, Tummalapalli KSS, Nair A, Patel N. Sulfate Radical Anion (SO4•–) Mediated C(sp3)–H Nitrogenation/Oxygenation in N-Aryl Benzylic Amines Expanded the Scope for the Synthesis of Benzamidine/Oxazine Heterocycles. J Org Chem 2015; 80:11351-9. [DOI: 10.1021/acs.joc.5b01872] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical
Technology (Process Chemistry) National Institute of Pharmaceutical Education and Research S. A. S. Nagar, Punjab 160062 India
| | - K. S. Satyanarayana Tummalapalli
- Department of Pharmaceutical
Technology (Process Chemistry) National Institute of Pharmaceutical Education and Research S. A. S. Nagar, Punjab 160062 India
| | - Akshay Nair
- Department of Pharmaceutical
Technology (Process Chemistry) National Institute of Pharmaceutical Education and Research S. A. S. Nagar, Punjab 160062 India
| | - Nidhi Patel
- Department of Pharmaceutical
Technology (Process Chemistry) National Institute of Pharmaceutical Education and Research S. A. S. Nagar, Punjab 160062 India
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26
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Han W, Zhou X, Yang S, Xiang G, Cui B, Chen Y. Palladium-Catalyzed Nucleophilic Substitution/C–H Activation/Aromatization Cascade Reaction: One Approach To Construct 6-Unsubstituted Phenanthridines. J Org Chem 2015; 80:11580-7. [DOI: 10.1021/acs.joc.5b02145] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wenyong Han
- School of Pharmacy, Zunyi Medical University, Zunyi, 563000, P. R. China
| | - Xiaojian Zhou
- School of Pharmacy, Zunyi Medical University, Zunyi, 563000, P. R. China
| | - Siyi Yang
- School of Pharmacy, Zunyi Medical University, Zunyi, 563000, P. R. China
| | - Guangyan Xiang
- School of Pharmacy, Zunyi Medical University, Zunyi, 563000, P. R. China
| | - Baodong Cui
- School of Pharmacy, Zunyi Medical University, Zunyi, 563000, P. R. China
| | - Yongzheng Chen
- School of Pharmacy, Zunyi Medical University, Zunyi, 563000, P. R. China
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27
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Laha JK, Dayal N, Jethava KP, Prajapati DV. Access to Biaryl Sulfonamides by Palladium-Catalyzed Intramolecular Oxidative Coupling and Subsequent Nucleophilic Ring Opening of Heterobiaryl Sultams with Amines. Org Lett 2015; 17:1296-9. [DOI: 10.1021/acs.orglett.5b00290] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical
Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Neetu Dayal
- Department of Pharmaceutical
Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Krupal P. Jethava
- Department of Pharmaceutical
Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Dilip V. Prajapati
- Department of Pharmaceutical
Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
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Ryan JH, Smith JA, Hyland C, Meyer AG, Williams CC, Bissember AC, Just J. Seven-Membered Rings. PROGRESS IN HETEROCYCLIC CHEMISTRY 2015. [DOI: 10.1016/b978-0-08-100024-3.00016-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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