1
|
Kumar S, Kajol K, Nayak P, Kumar A, Ramesh C. Synthesis of tetracyclic 4H-benzo[5,6]chromeno[3,4-d]oxazoles via palladium-catalyzed intramolecular direct heteroarylation. Chem Asian J 2023; 18:e202201151. [PMID: 36519340 DOI: 10.1002/asia.202201151] [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: 11/14/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
We report a palladium-catalyzed intramolecular direct heteroarylation of oxazole tethered β-naphthols to access corresponding tetracyclic 4H-benzo[5,6]chromeno[3,4-d]oxazoles. Various functional groups are well tolerated and furnished the desired products in good to excellent yields under the present reaction conditions. The scale-up reaction and synthetic utility of the resulting molecules have been demonstrated. Moreover, UV/vis absorption and fluorescence emission properties have been evaluated for these polyheterocyclic compounds.
Collapse
Affiliation(s)
- Sujeet Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
| | - Km Kajol
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India
| | - Prakash Nayak
- School of Chemical Sciences National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar, 752050, Odisha, India
| | - Amit Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
| | - Chintakunta Ramesh
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
| |
Collapse
|
2
|
Kurma SH, Somanaboina R, Vanammoole LR, Srivishnu KS, Bhimapaka CR, Giribabu L. 2H-Pyrano[3,2-c]chromene-2,5(6H)-diones: Synthesis, Characterization, Photophysical and Redox Studies for Potential Optoelectronic Applications. J Fluoresc 2022; 33:1125-1138. [PMID: 36586062 DOI: 10.1007/s10895-022-03058-2] [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: 05/17/2022] [Accepted: 10/25/2022] [Indexed: 01/01/2023]
Abstract
Herein, we report the preparation of 2H-pyrano[3,2-c]chromene-2,5(6H)-diones 3a-x by reacting 4-hydroxycoumarins 1a-b with Baylis-Hillman adducts 2a-w having electron releasing or electron withdrawing groups on benzyl ring of the pyranochromene moiety and study of their photophysical properties. The study of optical and electrochemical properties of the prepared compounds reveals that the electron releasing and electron withdrawing groups has not much impact on ground and excited state electronic behavior on pyranochromene moiety. The density functional theory suggests the highest occupied molecular orbital and lowest unoccupied molecular orbitals spread on coumarin moiety of pyranochromene unit. Further, these compounds are thermally stable (up to 200 °C) and lead to blue or green emission that should facilitate the development of organic light emitting diodes (OLEDs).
Collapse
Affiliation(s)
- Siva Hariprasad Kurma
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Tarnaka, Telangana, India
| | - Ramya Somanaboina
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Tarnaka, Telangana, India
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, 201002, India
| | - Lakshmi Reddy Vanammoole
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Tarnaka, Telangana, India
| | - K S Srivishnu
- Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Tarnaka, Telangana, India
| | - China Raju Bhimapaka
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Tarnaka, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, 201002, India.
| | - Lingamallu Giribabu
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, 201002, India.
- Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Tarnaka, Telangana, India.
| |
Collapse
|
3
|
Kolla ST, Rayala NR, Sridhar B, Bhimapaka CR. Unexpected ring opening of pyrazolines with activated alkynes: synthesis of 1 H-pyrazole-4,5-dicarboxylates and chromenopyrazolecarboxylates. Org Biomol Chem 2022; 20:334-338. [PMID: 34901988 DOI: 10.1039/d1ob01727f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
1H-Pyrazole-4,5-dicarboxylates and chromenopyrazole carboxylates were prepared by reacting pyrazolines with activated alkynes under neat conditions without a catalyst. The products were formed via unexpected ring opening of pyrazolines with the elimination of styrene/ethylene. These types of transformations are unknown and the products formed were confirmed using their spectral/analytical data. In addition, the structures of compounds 5e and 5n were confirmed by single-crystal X-ray analysis. Control experiments were conducted to support the proposed reaction mechanism.
Collapse
Affiliation(s)
- Sai Teja Kolla
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Nageswara Rao Rayala
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India.
| | - Balasubramanian Sridhar
- Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India
| | - China Raju Bhimapaka
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| |
Collapse
|
4
|
Wu S, Geng F, Dong J, Liu L, Su L, Zhou Y. General and practical synthesis of naphtho[2,1-d]oxazoles from naphthols and amines. Org Chem Front 2022. [DOI: 10.1039/d2qo00557c] [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 general and practical synthesis of naphtho[2,1-d]oxazoles from readily available naphthols and amines is developed using TEMPO as the oxygen source with outstanding functional group tolerance, especially for the construction...
Collapse
|
5
|
|
6
|
Xiao J, Wang Y, Yang Y, Liu J, Chen G, Lin B, Hou Y, Li N. Natural potential neuroinflammatory inhibitors from Stephania epigaea H.S. Lo. Bioorg Chem 2020; 107:104597. [PMID: 33450546 DOI: 10.1016/j.bioorg.2020.104597] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 12/22/2020] [Accepted: 12/22/2020] [Indexed: 12/23/2022]
Abstract
Stephania epigaea H. S. Lo is a folk medicine widely distributed in the south of China, especially in Yunnan and Guangxi province. An in vitro anti-neuroinflammatory study showed that total alkaloids of it can potently inhibit LPS-induced NO releasing of BV2 cells with an IC50 value of 10.05 ± 2.03 μg/mL (minocycline as the positive drug, IC50 15.49 ± 2.14 μM). The phytochemical investigation of the total alkaloids afforded three new phenanthrene (1-3), two lactams (4a, 4b), and nine aporphine derivatives (5-13). The final structure of 1 was identified by computer-assisted structure elucidation (ACD/Structure Elucidator software and the 13C NMR calculation with GIAO method) due to many possibilities of the substituent pattern. All isolates were evaluated for their anti-neuroinflammatory effects, and as a result, 5, 8, 10, and 11 exhibited stronger inhibitory activities than the minocycline. The results suggested S. epigaea could provide potential therapeutic agents for neurodegenerative diseases.
Collapse
Affiliation(s)
- Jiao Xiao
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang 110016, People's Republic of China
| | - Yingjie Wang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang 110016, People's Republic of China
| | - Yanqiu Yang
- College of Life and Health Sciences, Northeastern University, Shenyang 110004, People's Republic of China
| | - Jingyu Liu
- College of Life and Health Sciences, Northeastern University, Shenyang 110004, People's Republic of China
| | - Gang Chen
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang 110016, People's Republic of China
| | - Bin Lin
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Yue Hou
- College of Life and Health Sciences, Northeastern University, Shenyang 110004, People's Republic of China.
| | - Ning Li
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang 110016, People's Republic of China.
| |
Collapse
|
7
|
Vanammoole L, Kommera R, Hariprasad Kurma S, Rao Vaidya J, Raju Bhimapaka C. Regioselective Halogenation of 2
H
‐Chromenones Promoted by Oxone and NaX: A Facile Approach for the Preparation of Halochromenones and 2
H
‐Chromenone Natural Products. ChemistrySelect 2020. [DOI: 10.1002/slct.202000908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Lakshmireddy Vanammoole
- Department of Organic Synthesis & Process ChemistryCSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
- AcSIR-Postal Staff College Area, Sector 19Kamla Nehru Nagar,Ghaziabad Uttar Pradesh 201002 India
| | - Rajkumar Kommera
- Department of Organic Synthesis & Process ChemistryCSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
- AcSIR-Postal Staff College Area, Sector 19Kamla Nehru Nagar,Ghaziabad Uttar Pradesh 201002 India
| | - Siva Hariprasad Kurma
- Department of Organic Synthesis & Process ChemistryCSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
- AcSIR-Postal Staff College Area, Sector 19Kamla Nehru Nagar,Ghaziabad Uttar Pradesh 201002 India
| | - Jayathirtha Rao Vaidya
- Fluoro AgrochemicalsCSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
- AcSIR-Postal Staff College Area, Sector 19Kamla Nehru Nagar,Ghaziabad Uttar Pradesh 201002 India
| | - China Raju Bhimapaka
- Department of Organic Synthesis & Process ChemistryCSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
- AcSIR-Postal Staff College Area, Sector 19Kamla Nehru Nagar,Ghaziabad Uttar Pradesh 201002 India
| |
Collapse
|
8
|
Kasagani VP, Kurma SH, Bhimapaka CR. Stereospecific Synthesis of 3,4-Dihydro-2 H-naphtho-1,4-oxazin-2-ones by Unification of Benzoxepine-4-carboxylates with Chiral Amino Acid Ethyl Esters. J Org Chem 2020; 85:2976-2983. [PMID: 31995711 DOI: 10.1021/acs.joc.9b02624] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel and efficient stereocontrolled method has been developed for the preparation of chiral 3,4-dihydro-2H-naphtho[1,2-b][1,4]oxazin-2-ones by the reaction of benzoxepine-4-carboxylates with chiral amino acid ethyl esters for the first time. The chiral 3,4-dihydro-2H-naphtho-1,4-oxazinones have been achieved in one step by the formation of C-N, C-C, and C-O bonds.
Collapse
Affiliation(s)
- Veera Prasad Kasagani
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - Siva Hariprasad Kurma
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - China Raju Bhimapaka
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| |
Collapse
|
9
|
Kasagani VP, Kurma SH, Bhimapaka CR. A facile construction of oxygen heterocycles by the reaction of benzoxepine-4-carboxylates with dihaloalkanes and activated alkynes. Org Biomol Chem 2019; 17:6645-6653. [PMID: 31237599 DOI: 10.1039/c9ob00769e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This manuscript describes the preparation of heterocyclic compounds such as naphtho[1,3]-dioxoles (3a-h), [1,4]-dioxines (4a-h), [1,4]-dioxepines (5a-c), [1,4]-dioxocines (6a-c) and diethyl 2-(2-ethoxy-2-oxoethyl)naphtho[1,3]dioxoles (8a-f). These heterocyclic compounds have been achieved by the reaction of benzoxepine-4-carboxylates (1a-h) with dihaloalkanes (2a-e) and activated alkyne (7a) for the first time. This work represents the first example for the construction of utile oxygen heterocycles by the formation of C-C and C-O bonds in a one step process.
Collapse
Affiliation(s)
- Veera Prasad Kasagani
- Organic Synthesis and Process Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
| | - Siva Hariprasad Kurma
- Organic Synthesis and Process Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
| | - China Raju Bhimapaka
- Organic Synthesis and Process Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
| |
Collapse
|
10
|
Lakshmireddy VM, Naga Veera Y, Reddy TJ, Rao VJ, China Raju B. A Green and Sustainable Approach for Selective Halogenation of Anilides, Benzanilides, Sulphonamides and Heterocycles
†. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900296] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- V. M. Lakshmireddy
- Organic Synthesis & Process Chemistry DivisionCSIR-Indian Institute of Chemical Technology Hyderabad 500 007 India
- AcSIR-Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201002 India
| | - Y. Naga Veera
- Analytical Chemistry DivisionCSIR-Indian Institute of Chemical Technology Hyderabad 500 007 India
| | - T. J. Reddy
- Analytical Chemistry DivisionCSIR-Indian Institute of Chemical Technology Hyderabad 500 007 India
| | - V. J. Rao
- Fluoro Agrochemicals DivisionCSIR-Indian Institute of Chemical Technology Hyderabad 500 007 India
- AcSIR-Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201002 India
| | - B. China Raju
- Organic Synthesis & Process Chemistry DivisionCSIR-Indian Institute of Chemical Technology Hyderabad 500 007 India
- AcSIR-Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201002 India
| |
Collapse
|
11
|
Dayakar C, Raju B. A Selective Three-Component, One-Pot Approach for the Synthesis of 1,2-Dihydroquinazolines and Quinazolines. ChemistrySelect 2018. [DOI: 10.1002/slct.201801430] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Cherupally Dayakar
- Organic Synthesis & Process Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad-500007 India
| | - BhimapakaChina Raju
- Organic Synthesis & Process Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad-500007 India
| |
Collapse
|