1
|
Das A, Mandal R, Ravi Sankar HS, Kumaran S, Premkumar JR, Borah D, Sundararaju B. Reversal of Regioselectivity in Asymmetric C-H Bond Annulation with Bromoalkynes under Cobalt Catalysis. Angew Chem Int Ed Engl 2024; 63:e202315005. [PMID: 38095350 DOI: 10.1002/anie.202315005] [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: 10/06/2023] [Indexed: 12/30/2023]
Abstract
Metal-catalyzed asymmetric C-H bond annulation strategy offers a versatile platform, allowing the construction of complex P-chiral molecules through atom- and step-economical fashion. However, regioselective insertion of π-coupling partner between M-C bond with high enantio-induction remain elusive. Using commercially available Co(II) salt and chiral-Salox ligands, we demonstrate an unusual protocol for the regio-reversal, enantioselective C-H bond annulation of phosphinamide with bromoalkyne through desymmetrization. The reaction proceeds through ligand-assisted enantiodetermining cyclocobaltation followed by regioselective insertion of bromoalkyne between Co-C, subsequent reductive elimination, and halogen exchange with carboxylate resulted in P-stereogenic compounds in excellent ee (up to >99 %). The isolation of cobaltacycle involved in the catalytic cycle and the outcome of control experiments provide support for a plausible mechanism.
Collapse
Affiliation(s)
- Abir Das
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
| | - Rajib Mandal
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
| | | | - Subramani Kumaran
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
| | - J Richard Premkumar
- PG & Research Department of Chemistry, Bishop Heber College, 620017, Tiruchirappalli, Tamil Nadu, India
| | - Dipanti Borah
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, 400076, Mumbai, Maharashtra, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
| |
Collapse
|
2
|
Zhao B, Li H, Jiang F, Wan JP, Cheng K, Liu Y. Synergistic Visible Light and Pd-Catalyzed C-H Alkylation of 1-Naphthylamines with α-Diazoesters. J Org Chem 2023; 88:640-646. [PMID: 36538361 DOI: 10.1021/acs.joc.2c01702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The combination of visible light irradiation and Pd-catalysis has been practically employed for the C-H alkylation reactions of naphthylamines and α-diazo esters, leading to the synthesis of α-naphthyl functionalized acetates via C-C bond construction under mild reaction conditions and under solvent-free conditions. The light irradiation has been proven to play a pivotal role in the reactions, probably by promoting the generation of active carbene species from α-diazo esters.
Collapse
Affiliation(s)
- Baoli Zhao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China.,Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China
| | - Haifeng Li
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China
| | - Fengxuan Jiang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Kai Cheng
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| |
Collapse
|
3
|
Kumar S, Singh AK. Micro-photo-flow reactor system for fused N-heteroaryl scaffold synthesis and late-stage functionalization of pyrazolopyridines. Chem Commun (Camb) 2022; 58:11268-11271. [PMID: 36112131 DOI: 10.1039/d2cc03713k] [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
Late-stage functionalization (LSF) of active pharmaceutical ingredients can provide a straightforward approach to efficient de novo design and synthesis of drug molecules for structural activity relationship studies (SARS). Herein, we have developed a visible-light-driven modular micro-flow reactor consisting of an integrated post-synthetic work-up that was designed and developed to synthesize a fused N-heteroaryl scaffold and late-stage functionalization of pyrazolopyridines without using any expensive oxidant or additional photo-catalyst (PC).
Collapse
Affiliation(s)
- Sanjeev Kumar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Ajay K Singh
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| |
Collapse
|
4
|
Kumar S, Nair AM, Volla CMR. Dual Photoredox Cobalt Catalyzed [4+1] Annulation and C-H Alkoxylation. Chem Asian J 2022; 17:e202200801. [PMID: 35939065 DOI: 10.1002/asia.202200801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/05/2022] [Indexed: 11/06/2022]
Abstract
Herein, we developed two distinct pyridine N-oxide directed C-H activation protocols to achieve [4+1] annulation and alkoxylation of benzamide derivatives by merging Co-catalysis with visible light photoredox catalysis. The protocols deliver the respective products in good yields under facile conditions at room temperature. The use of cheap photocatalyst coupled with molecular oxygen bypassing the need of stoichiometric oxidants forms the chief highlight of the work. The protocols are scalable and the products could be further modified. Additionally, preliminary studies were carried out to probe the reaction mechanism.
Collapse
Affiliation(s)
- Shreemoyee Kumar
- IIT Bombay: Indian Institute of Technology Bombay, Department of Chemistry, INDIA
| | - Akshay M Nair
- IIT Bombay: Indian Institute of Technology Bombay, Department of Chemistry, INDIA
| | - Chandra M R Volla
- IIT-Bombay, Chemistry, Lab no. 418B, 3rd FLOOR, DEPARTMENT OF CHEMISTRY, INDIAN INSTITUTE OF TECHNOLOGY BOMBAY, Lab no. 418B, 3rd FLOOR, DEPARTMENT OF CHEMISTRY, INDIAN INSTITUTE OF TECHNOLOGY BOMBAY, 400076, POWAI, MUMBAI, INDIA
| |
Collapse
|
5
|
Sarkar T, Shah TA, Maharana PK, Debnath B, Punniyamurthy T. Dual Metallaphotoredox Catalyzed Directed C(sp2)‐H Functionalization: Access to C‐C/C‐Heteroatom Bonds. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tanumay Sarkar
- IIT Guwahati: Indian Institute of Technology Guwahati Chemistry INDIA
| | | | | | - Bijoy Debnath
- Indian Institute of Technology Guwahati Chemistry INDIA
| | | |
Collapse
|
6
|
Bajya KR, Sermadurai S. Dual Photoredox and Cobalt Catalysis Enabled Transformations. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | - Selvakumar Sermadurai
- Indian Institute of Technology Indore Chemistry Khandwa road Simrol 453552 Indore INDIA
| |
Collapse
|
7
|
Ma L, Zhang X, Tuo Y, Zheng QZ. Cp*Rh(III)-Catalyzed Regioselective C(sp 2)-H Mono- and Dialkynylation of Thioamides by Sulfur Coordination. J Org Chem 2022; 87:3691-3700. [PMID: 35138097 DOI: 10.1021/acs.joc.1c02622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient Cp*Rh(III)-catalyzed regioselective C(sp2)-H mono- and dialkynylation of thioamides was described. This reaction was performed under mild conditions in high yields (up to 98%) with a broad substrate scope. Significantly, the versatility of this method was further demonstrated by controlled mono- and dialkynylation. Application of this protocol in the late stage functionalization of two drug molecules (Adapalene and Amoxapine) was also demonstrated.
Collapse
Affiliation(s)
- Lin Ma
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Xiaohui Zhang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Yanyan Tuo
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
| | - Qing-Zhong Zheng
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China.,State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing 100191, China
| |
Collapse
|
8
|
Chakraborty P, Mandal R, Paira S, Sundararaju B. C-H bond functionalization by dual catalysis: merging of high-valent cobalt and photoredox catalysis. Chem Commun (Camb) 2021; 57:13075-13083. [PMID: 34779804 DOI: 10.1039/d1cc04872d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The merger of transition metal catalysis and photocatalysis has emerged as a versatile platform that opened the gateway to diverse low-energy pathways for several synthetic transformations. However, amidst the first-row transition metals, directed C-H bond functionalization mediated by high-valent cobalt catalysis has advanced with rising momentum owing to its unique reactivity and the ability to participate in both one- and two-electron transfer reactions. However, the use of expensive, privileged Cp* ligands or use of stoichiometric silver(I) or manganese(III) is unavoidable. Despite significant advances in their respective fields, the combination of these two "green" approaches to further the vested interest of the scientific research community towards the development of ecofriendly and sustainable protocols is noticeably limited. Thus, the methodology based on high-cobalt-photoredox dual-catalytic strategy has high dormant potential and is worthy to explore. Herein, we highlight the recent advances in the high-valent cobalt-catalyzed sustainable catalytic approach by harnessing light energy for oxidative C-H bond functionalization. With this, we hope to inspire the development of unexplored cobalt-photoredox-catalyzed reactions with improved efficiency and selectivity.
Collapse
Affiliation(s)
- Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
| | - Rajib Mandal
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
| | - Soumen Paira
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
| |
Collapse
|