1
|
Teli B, Wani MM, Jan S, Bhat HR, Bhat BA. Micelle-mediated synthesis of quinoxaline, 1,4-benzoxazine and 1,4-benzothiazine scaffolds from styrenes. Org Biomol Chem 2024; 22:6593-6604. [PMID: 39086328 DOI: 10.1039/d4ob00928b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
A range of heterocycles based on quinoxalines, 1,4-benzoxazines and 1,4-benzothiazines have been accessed from styrenes by reacting them with benzene-1,2-diamine, 2-aminophenol and 2-aminothiophenol respectively in micellar medium. This reaction occurring in a less explored cetylpyridinium bromide (CPB) micellar medium operates in the presence of NBS through a tandem hydrobromination-oxidation cascade, converting styrenes to phenacyl bromides. Its subsequent nucleophilic addition with aromatic 1,2-dinucleophiles and further transformations led to the formation of heterocyclic constructs. The locus of the reaction site was confirmed through NMR studies and the types of interactions between the CPB and solubilizates were established by DFT calculations.
Collapse
Affiliation(s)
- Bisma Teli
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Mohmad Muzafar Wani
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Shafia Jan
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
| | - Haamid Rasool Bhat
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
| | - Bilal A Bhat
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| |
Collapse
|
2
|
Bharadwaj KC. Chemoselective Intramolecular Morita-Baylis-Hillman Reaction; Acrylamide and Ketone as Sluggish Reacting Partners on a Labile Framework. J Org Chem 2024. [PMID: 38164748 DOI: 10.1021/acs.joc.3c02168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Chemoselectivity is an important issue frequently encountered while working over labile precursors. Carbonyl compounds with a heteroatom at the β carbon are sensitive precursors because they are prone to elimination under different conditions. Morita-Baylis-Hillman (MBH) reaction, although a widespread method for C-C bond formation, has its own limitations. Acrylamide and ketone are such limitations of the MBH reaction. Using them together for an intramolecular MBH (IMBH) reaction on a labile framework prone to elimination is a significant 2-fold synthetic challenge. A highly chemoselective IMBH reaction on such precursors has been established using 1,4-diazabicyclo[2.2.2]octane (DABCO) as a promoter. The protocol leads to quick access to a diversely substituted and functionalized piperidone framework in high yields. Various substitution patterns in the form of 34 successful examples have been studied. A diastereoselective version and tolerance to various functional and protecting groups are the added advantages of the developed methodology. A tertiary carbon at the β position of ketone, however, led to complete reversal of selectivity and gave only the elimination product. Control experiments toward a better understanding of the substitution pattern, role of catalyst, and mechanistic study have been carried out. As an application of the IMBH adduct, a one-step allylic rearrangement for the dihydropyridone framework has also been demonstrated.
Collapse
|
3
|
Xue L, Liu W, Li S, Duchemin N, Lou M, Yuan J, Zhang H, Chen J, Yu W, Yang K, Hu YJ. On-DNA Morita-Baylis-Hillman Reaction: Accessing Targeted Covalent Inhibitor Motifs in DNA-Encoded Libraries. Bioconjug Chem 2023; 34:1366-1373. [PMID: 37418679 DOI: 10.1021/acs.bioconjchem.3c00138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2023]
Abstract
We herein present the first application of the on-DNA Morita-Baylis-Hillman (MBH) reaction for the creation of pharmaceutically relevant targeted covalent inhibitors (TCIs) with an α-hydroxyl Michael acceptor motif. Adapting a DNA-compatible organocatalytic process, this MBH reaction for covalent selection-capable DNA encoded library (DEL) synthesis grants access to densely functionalized and versatile precursors to explore novel chemical space for molecule recognition in drug discovery. Most importantly, this methodology sheds light on potentially unexpected reaction outcomes of the MBH reaction.
Collapse
Affiliation(s)
- Lijun Xue
- Pharmaron (Ningbo) Technology Development Co., Ltd. No. 800 Bin-Hai 4th Road, Hangzhou Bay New Zone, Ningbo, 315336, P.R. China
| | - Weijie Liu
- Pharmaron (Ningbo) Technology Development Co., Ltd. No. 800 Bin-Hai 4th Road, Hangzhou Bay New Zone, Ningbo, 315336, P.R. China
| | - Shu Li
- Pharmaron (Ningbo) Technology Development Co., Ltd. No. 800 Bin-Hai 4th Road, Hangzhou Bay New Zone, Ningbo, 315336, P.R. China
| | - Nicolas Duchemin
- Pharmaron U.K., Ltd., Innovation Park, West Cl, Hertford Rd, Hoddesdon EN11 9FH, United Kingdom
| | - Mengjia Lou
- Pharmaron (Ningbo) Technology Development Co., Ltd. No. 800 Bin-Hai 4th Road, Hangzhou Bay New Zone, Ningbo, 315336, P.R. China
| | - Jingyu Yuan
- Pharmaron (Ningbo) Technology Development Co., Ltd. No. 800 Bin-Hai 4th Road, Hangzhou Bay New Zone, Ningbo, 315336, P.R. China
| | - Huanqing Zhang
- Pharmaron (Ningbo) Technology Development Co., Ltd. No. 800 Bin-Hai 4th Road, Hangzhou Bay New Zone, Ningbo, 315336, P.R. China
| | - Junyun Chen
- Pharmaron (Ningbo) Technology Development Co., Ltd. No. 800 Bin-Hai 4th Road, Hangzhou Bay New Zone, Ningbo, 315336, P.R. China
| | - Weina Yu
- Pharmaron (Ningbo) Technology Development Co., Ltd. No. 800 Bin-Hai 4th Road, Hangzhou Bay New Zone, Ningbo, 315336, P.R. China
| | - Kexin Yang
- Pharmaron Beijing Co., Ltd., 6 Taihe Road, BDA, Beijing 100176, P.R. China
| | - Yun Jin Hu
- Pharmaron (Ningbo) Technology Development Co., Ltd. No. 800 Bin-Hai 4th Road, Hangzhou Bay New Zone, Ningbo, 315336, P.R. China
| |
Collapse
|
4
|
Wani MM, Rashid A, Bhat BA. A micelle-mediated approach enables facile access to bridged oxabicyclo[ n.3.1]alkene scaffolds. Org Biomol Chem 2023; 21:6151-6159. [PMID: 37462511 DOI: 10.1039/d3ob00918a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
Oxabicyclo[n.3.1]alkene scaffolds present in a diverse range of complex natural products have been accessed by reacting 2-cycloalkenones with 1,3-cycloalkadiones in a micellar medium. This reaction occurring in a micellar confinement environment operates through a Michael addition/enolization/oxygen addition cascade to furnish highly functionalized constructs using a sustainable organic synthesis protocol. NMR analysis confirms that the locus of the solubilizates is within the palisade and stern regions of the micellar cavity.
Collapse
Affiliation(s)
- Mohmad Muzafar Wani
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Auqib Rashid
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Bilal A Bhat
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| |
Collapse
|
5
|
Sharma V, Chavan KA, Mali G, Sarkar D, Lama P, Majumder M, Erande RD, Metre RK. A Catecholaldimine-Based Ni II-Complex as an Effective Catalyst for the Direct Conversion of Alcohols to trans-Cinnamonitriles and Aldehydes. J Org Chem 2023. [PMID: 37155715 DOI: 10.1021/acs.joc.2c03067] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A nickel(II) complex [Ni(HL)2] 1 was synthesized by treatment of a new catecholaldimine-based ligand with NiCl2·6H2O in methanol at room temperature. Complex 1 showed excellent catalytic activity where aromatic and heterocyclic alcohols were rapidly converted into trans-cinnamonitrile in a one-pot manner via oxidative olefination in the presence of KOH. The potential of the disclosed catalyst and the results obtained for the direct conversion of alcohols to two different functionalities (trans-cinnamonitrile and aldehydes) are well supported by DFT studies.
Collapse
Affiliation(s)
- Vivek Sharma
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| | - Kailas Arjun Chavan
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| | - Ghanshyam Mali
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| | - Dipanjana Sarkar
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| | - Prem Lama
- CSIR-Indian Institute of Petroleum, Haridwar Road, Mokhampur, Dehradun 248005, India
| | - Moumita Majumder
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Jodhpur, Jodhpur 342030, India
| | - Rohan D Erande
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| | - Ramesh K Metre
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| |
Collapse
|
6
|
Porto RS, Porto VA. Morita-Baylis-Hillman adducts and their derivatives: a patent-based exploration of diverse biological activities. Pharm Pat Anal 2023; 12:127-141. [PMID: 37671921 DOI: 10.4155/ppa-2023-0021] [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] [Indexed: 09/07/2023]
Abstract
Morita-Baylis-Hillman adducts are polyfunctionalized compounds that result from a three-component reaction involving an electrophilic sp2 carbon (aldehyde, ketone or imine) and the α-position of an activated alkene, catalyzed by a tertiary amine. These adducts exhibit a wide range of biological activities and act as valuable starting materials for developing drug candidates, pesticides, polymers, and other applications. In this regard, the present review aimed to explore the biological potential of Morita-Baylis-Hillman adducts and their derivatives as documented in patent literature. Additionally, the review delves into the synthetic methodologies employed in their preparation.
Collapse
Affiliation(s)
- Ricardo S Porto
- Institute of Chemistry & Biotechnology, Federal University of Alagoas, Maceio, Brazil
| | - Viviane A Porto
- Institute of Pharmaceutical Sciences, Federal University of Alagoas, Maceio, Brazil
| |
Collapse
|
7
|
Shukla P, Asati A, Patel D, Singh M, Rai VK, Rai A. Novel Synergistic Catalysis by Ethylcarbodiimide Hydrochloride Salt and CuI Towards Morita‐Baylis‐Hillman Reaction. ChemistrySelect 2023. [DOI: 10.1002/slct.202202747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Prashant Shukla
- School of Physical Sciences Jawaharlal Nehru University New Delhi 110 067 India
| | - Ambika Asati
- Department of Chemistry Guru Ghasidas Vishwavidyalaya (Central University) Bilaspur 495 009, C.G. India
| | - Devkumari Patel
- Department of Chemistry Guru Ghasidas Vishwavidyalaya (Central University) Bilaspur 495 009, C.G. India
| | - Manorama Singh
- Department of Chemistry Guru Ghasidas Vishwavidyalaya (Central University) Bilaspur 495 009, C.G. India
| | - Vijai K. Rai
- Department of Chemistry University of Lucknow Lucknow 226 007, U. P. India
| | - Ankita Rai
- School of Physical Sciences Jawaharlal Nehru University New Delhi 110 067 India
| |
Collapse
|
8
|
Tang C, McInnes BT. Cascade Processes with Micellar Reaction Media: Recent Advances and Future Directions. Molecules 2022; 27:molecules27175611. [PMID: 36080376 PMCID: PMC9458028 DOI: 10.3390/molecules27175611] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 08/27/2022] [Accepted: 08/29/2022] [Indexed: 11/26/2022] Open
Abstract
Reducing the use of solvents is an important aim of green chemistry. Using micelles self-assembled from amphiphilic molecules dispersed in water (considered a green solvent) has facilitated reactions of organic compounds. When performing reactions in micelles, the hydrophobic effect can considerably accelerate apparent reaction rates, as well as enhance selectivity. Here, we review micellar reaction media and their potential role in sustainable chemical production. The focus of this review is applications of engineered amphiphilic systems for reactions (surface-active ionic liquids, designer surfactants, and block copolymers) as reaction media. Micelles are a versatile platform for performing a large array of organic chemistries using water as the bulk solvent. Building on this foundation, synthetic sequences combining several reaction steps in one pot have been developed. Telescoping multiple reactions can reduce solvent waste by limiting the volume of solvents, as well as eliminating purification processes. Thus, in particular, we review recent advances in “one-pot” multistep reactions achieved using micellar reaction media with potential applications in medicinal chemistry and agrochemistry. Photocatalyzed reactions in micellar reaction media are also discussed. In addition to the use of micelles, we emphasize the process (steps to isolate the product and reuse the catalyst).
Collapse
Affiliation(s)
- Christina Tang
- Chemical and Life Science Engineering Department, Virginia Commonwealth University, Richmond, VA 23284, USA
- Correspondence:
| | - Bridget T. McInnes
- Computer Science Department, Virginia Commonwealth University, Richmond, VA 23284, USA
| |
Collapse
|