1
|
Recent advances in transition-metal-free C–H functionalization of imidazo[1,2-a]pyridines. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.03.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
|
2
|
Liu H, He GC, Zhao CY, Zhang XX, Ji DW, Hu YC, Chen QA. Redox-Divergent Construction of (Dihydro)thiophenes with DMSO. Angew Chem Int Ed Engl 2021; 60:24284-24291. [PMID: 34460141 DOI: 10.1002/anie.202109026] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Indexed: 11/10/2022]
Abstract
Thiophene-based rings are one of the most widely used building blocks for the synthesis of sulfur-containing molecules. Inspired by the redox diversity of these features in nature, we demonstrate herein a redox-divergent construction of dihydrothiophenes, thiophenes, and bromothiophenes from the respective readily available allylic alcohols, dimethyl sulfoxide (DMSO), and HBr. The redox-divergent selectivity could be manipulated mainly by controlling the dosage of DMSO and HBr. Mechanistic studies suggest that DMSO simultaneously acts as an oxidant and a sulfur donor. The synthetic potentials of the products as platform molecules were also demonstrated by various derivatizations, including the preparation of bioactive and functional molecules.
Collapse
Affiliation(s)
- Heng Liu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Gu-Cheng He
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chao-Yang Zhao
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiang-Xin Zhang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ding-Wei Ji
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Yan-Cheng Hu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| |
Collapse
|
3
|
Redox‐Divergent Construction of (Dihydro)thiophenes with DMSO. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
4
|
Lu LH, Ou G, Zhao X, Wang Y, Chen X, Liao W, Li S, Wu C. Selective difunctionalization of electron-deficient alkynes: access to ( E)-2-iodo-3-(methylthio)acrylate. Org Biomol Chem 2021; 19:8128-8132. [PMID: 34473178 DOI: 10.1039/d1ob01287h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A convenient and efficient approach to (E)-2-iodo-3-(methylthio)acrylate has been developed through direct iodothiomethylation of alkynes with aqueous HI and DMSO under mild conditions. This novel protocol has demonstrated a unique difunctionalization of electron-deficient alkynes with a broad substrate scope and excellent functional-group tolerance. Preliminary mechanistic studies indicated that prior diiodination of alkynes, followed by nucleophilic substitution with in situ generated DMS led to the formation of (E)-2-iodo-3-(methylthio)acrylate.
Collapse
Affiliation(s)
- Ling-Hui Lu
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Guangchuan Ou
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Xiongjie Zhao
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Yufei Wang
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Xuelian Chen
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Wenjun Liao
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Shundan Li
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Chao Wu
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| |
Collapse
|
5
|
Zhang X, Miao X, Jiang H, Ge F, Sun J, Zhang R, Ouyang Q, Fan W, Zhu Y, Sun Y. Iodine‐Promoted Synthesis of Dipyrazolo/Diuracil‐Fused Pyridines and
o
‐Amino Diheteroaryl ketones via Oxidative Domino Annulation of 2/4‐Methylazaarenes. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100839] [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)
- Xin‐Ke Zhang
- School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong Yantai University Shandong Yantai 264005 People's Republic of China
| | - Xiao‐Yu Miao
- School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong Yantai University Shandong Yantai 264005 People's Republic of China
| | - Hui‐Ru Jiang
- School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong Yantai University Shandong Yantai 264005 People's Republic of China
| | - Fei Ge
- School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong Yantai University Shandong Yantai 264005 People's Republic of China
| | - Jia‐Chen Sun
- School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong Yantai University Shandong Yantai 264005 People's Republic of China
| | - Rui‐Ying Zhang
- School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong Yantai University Shandong Yantai 264005 People's Republic of China
| | - Qin Ouyang
- School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong Yantai University Shandong Yantai 264005 People's Republic of China
| | - Wei‐Yu Fan
- School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong Yantai University Shandong Yantai 264005 People's Republic of China
| | - Yan‐Ping Zhu
- School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong Yantai University Shandong Yantai 264005 People's Republic of China
| | - Yuan‐Yuan Sun
- School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong Yantai University Shandong Yantai 264005 People's Republic of China
| |
Collapse
|
6
|
Lafzi F, Kilic H. Metal‐ and Additive‐Free C3‐Functionalization of Imidazo[1,2‐
a
]pyridines with
para
‐Quinone Methides. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100313] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ferruh Lafzi
- Department of Chemistry Faculty of Sciences Atatürk University 25240 Erzurum Turkey
| | - Haydar Kilic
- Department of Chemistry Faculty of Sciences Atatürk University 25240 Erzurum Turkey
- Oltu Vocational Training School Atatürk University 25400 Erzurum Turkey
| |
Collapse
|
7
|
Wang H, Xi Z, Huang S, Ding R, Gao Y, Liu Y, Sun B, Tian H, Liang S. Convenient Preparation of N-Acylbenzoxazines from Phenols, Nitriles, and DMSO Initiated by a Catalytic Amount of (COCl) 2. J Org Chem 2021; 86:4932-4943. [PMID: 33730490 DOI: 10.1021/acs.joc.0c02768] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A convenient preparation method of N-acylbenzoxazines has been developed, in which phenols react with nitriles and dimethyl sulfoxide (DMSO) in the presence of a catalytic amount of (COCl)2 in CH3CN or chloroform to afford the corresponding N-acylbenzoxazines in moderate-to-good yields. DMSO acts as a source of HCHO, which is generated in situ from the decomposition of a methoxydimethylsulfonium salt. A regeneration cycle of the methoxydimethylsulfonium salt is proposed, which is initiated by a catalytic amount of (COCl)2.
Collapse
Affiliation(s)
- Hao Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100048, China
| | - Zeyu Xi
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100048, China
| | - Shuai Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100048, China
| | - Rui Ding
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100048, China
| | - Yang Gao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100048, China
| | - Yongguo Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100048, China
| | - Baoguo Sun
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100048, China
| | - Hongyu Tian
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100048, China
| | - Sen Liang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing 100048, China
| |
Collapse
|
8
|
Wang A, Liu X, Kong Y, Wang J, Jiang TS. Substrate-induced DMSO activation and subsequent reaction for rapid construction of substituted pyrimidines. Org Chem Front 2021. [DOI: 10.1039/d0qo01416h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A metal-free direct synthesis of pyrimidines from amidine hydrochlorides, ketones and DMSO through substrate-induced DMSO activation and involved reactions has been developed.
Collapse
Affiliation(s)
- Anan Wang
- School of Life Sciences
- Anhui Agricultural University
- Hefei
- P.R. China
| | - Xuesong Liu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province
- School of Pharmacy
- Anhui Medical University
- Hefei 230032
- P.R. China
| | - Yi Kong
- School of Life Sciences
- Anhui Agricultural University
- Hefei
- P.R. China
| | - Jing Wang
- School of Life Sciences
- Anhui Agricultural University
- Hefei
- P.R. China
| | - Tao-Shan Jiang
- School of Life Sciences
- Anhui Agricultural University
- Hefei
- P.R. China
| |
Collapse
|
9
|
Marchenko N, Lacroix PG, Bukhanko V, Tassé M, Duhayon C, Boggio-Pasqua M, Malfant I. Multistep Photochemical Reactions of Polypyridine-Based Ruthenium Nitrosyl Complexes in Dimethylsulfoxide. Molecules 2020; 25:molecules25092205. [PMID: 32397237 PMCID: PMC7248738 DOI: 10.3390/molecules25092205] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/01/2020] [Accepted: 05/03/2020] [Indexed: 12/12/2022] Open
Abstract
The photorelease of nitric oxide (NO·) has been investigated in dimethylsulfoxide (DMSO) on two compounds of formula [Ru(R-tpy)(bpy)(NO)](PF6)3, in which bpy stands for 2,2′-bipyridine and R-tpy for the 4′-R-2,2′:6′,2″-terpyridine with R = H and MeOPh. It is observed that both complexes are extremely sensitive to traces of water, leading to an equilibrium between [Ru(NO)] and [Ru(NO2)]. The photoproducts of formula [Ru(R-tpy)(bpy)(DMSO)](PF6)2 are further subjected to a photoreaction leading to a reversible linkage isomerization between the stable Ru-DMSO(S) (sulfur linked) and the metastable Ru-DMSO(O) (oxygen linked) species. A set of 4 [Ru(R-tpy)(bpy)(DMSO)]2+ complexes (R = H, MeOPh, BrPh, NO2Ph) is investigated to characterize the ratio and mechanism of the isomerization which is tentatively related to the difference in absorbance between the Ru-DMSO(S) and Ru-DMSO(O) forms. In addition, the X-ray crystal structures of [Ru(tpy)(bpy)(NO)](PF6)3 and [Ru(MeOPh-tpy)(bpy)(DMSO(S))](PF6)2 are presented.
Collapse
Affiliation(s)
- Nataliia Marchenko
- LCC (Laboratoire de Chimie de Coordination), CNRS, 205, route de Narbonne, F-31077 Toulouse, France; (N.M.); (V.B.); (M.T.); (C.D.)
| | - Pascal G. Lacroix
- LCC (Laboratoire de Chimie de Coordination), CNRS, 205, route de Narbonne, F-31077 Toulouse, France; (N.M.); (V.B.); (M.T.); (C.D.)
- Correspondence: (L.P.G.); (M.B.-P.); (I.M.); Tel.: +33-561333188 (L.P.G.)
| | - Valerii Bukhanko
- LCC (Laboratoire de Chimie de Coordination), CNRS, 205, route de Narbonne, F-31077 Toulouse, France; (N.M.); (V.B.); (M.T.); (C.D.)
| | - Marine Tassé
- LCC (Laboratoire de Chimie de Coordination), CNRS, 205, route de Narbonne, F-31077 Toulouse, France; (N.M.); (V.B.); (M.T.); (C.D.)
| | - Carine Duhayon
- LCC (Laboratoire de Chimie de Coordination), CNRS, 205, route de Narbonne, F-31077 Toulouse, France; (N.M.); (V.B.); (M.T.); (C.D.)
| | - Martial Boggio-Pasqua
- Laboratoire de Chimie et Physique Quantiques, Université Paul Sabatier (Toulouse), UMR 5626, 218 route de Narbonne, F-31077 Toulouse, France
- Correspondence: (L.P.G.); (M.B.-P.); (I.M.); Tel.: +33-561333188 (L.P.G.)
| | - Isabelle Malfant
- LCC (Laboratoire de Chimie de Coordination), CNRS, 205, route de Narbonne, F-31077 Toulouse, France; (N.M.); (V.B.); (M.T.); (C.D.)
- Correspondence: (L.P.G.); (M.B.-P.); (I.M.); Tel.: +33-561333188 (L.P.G.)
| |
Collapse
|
10
|
Weng WZ, Guo JS, Liu KX, Shao TQ, Song LQ, Zhu YP, Sun YY, Meng QG. Metal-free oxidative C(sp3)–H functionalization: a facile route to quinoline formaldehydes from methyl-azaheteroarenes. CAN J CHEM 2020. [DOI: 10.1139/cjc-2019-0456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A facile protocol for the synthesis of quinoline formaldehydes via direct oxidative C–H bonds functionalization of methyl-azaheteroarenes in the presence of I2–DMSO has been described. This method is metal-free and easy to operate. This reaction provided a convenient route for the preparation of a range of important quinoline formaldehydes.
Collapse
Affiliation(s)
- Wei-Zhao Weng
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
| | - Jiang-Shan Guo
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
| | - Kai-Xuan Liu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
| | - Tian-Qi Shao
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
| | - Li-Qun Song
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
| | - Yan-Ping Zhu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
| | - Yuan-Yuan Sun
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
| | - Qing-Guo Meng
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P.R. China
| |
Collapse
|
11
|
Tashrifi Z, Mohammadi-Khanaposhtani M, Larijani B, Mahdavi M. C3-Functionalization of Imidazo[1,2-a
]pyridines. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901491] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zahra Tashrifi
- Endocrinology and Metabolism Research Center; Endocrinology and Metabolism Clinical Sciences Institute; Tehran University of Medical Sciences; Tehran I.R. Iran
| | | | - Bagher Larijani
- Endocrinology and Metabolism Research Center; Endocrinology and Metabolism Clinical Sciences Institute; Tehran University of Medical Sciences; Tehran I.R. Iran
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Center; Endocrinology and Metabolism Clinical Sciences Institute; Tehran University of Medical Sciences; Tehran I.R. Iran
| |
Collapse
|
12
|
Ye R, Cao Y, Xi X, Liu L, Chen T. Metal- and radical-free aerobic oxidation of heteroaromatic methanes: an efficient synthesis of heteroaromatic aldehydes. Org Biomol Chem 2019; 17:4220-4224. [PMID: 30946414 DOI: 10.1039/c9ob00490d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A metal-free and radical-free synthesis of heteroaromatic aldehydes was developed through aerobic oxidation of methyl groups in an I2/DMSO/O2 catalytic system. Under the reaction conditions, various functional groups such as methoxy, aldehyde, ester, nitro, amide, and halo (F, Cl, Br) groups were well tolerated. The bioactive compounds like chlorchinaldin derivative and papaverine were also oxidized to the corresponding aldehydes and ketones. This reaction provided an efficient method for preparing the valuable heteroaromatic aldehydes.
Collapse
Affiliation(s)
- Rongzi Ye
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | | | | | | | | |
Collapse
|
13
|
Tashrifi Z, Khanaposhtani MM, Larijani B, Mahdavi M. Dimethyl Sulfoxide: Yesterday's Solvent, Today's Reagent. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901021] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Zahra Tashrifi
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences InstituteTehran University of Medical Sciences Tehran I. R. Iran
| | | | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences InstituteTehran University of Medical Sciences Tehran I. R. Iran
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences InstituteTehran University of Medical Sciences Tehran I. R. Iran
| |
Collapse
|
14
|
Kumar Verma P, Vishwakarma RA, Sawant SD. Reaction Medium as the Installing Reservoir for Key Functionalities in the Molecules. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900223] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Praveen Kumar Verma
- Medicinal Chemistry DivisionCSIR-Indian Institute of Integrative Medicine Canal Road Jammu- 180001 India
| | - Ram A. Vishwakarma
- Medicinal Chemistry DivisionCSIR-Indian Institute of Integrative Medicine Canal Road Jammu- 180001 India
| | - Sanghapal D. Sawant
- Medicinal Chemistry DivisionCSIR-Indian Institute of Integrative Medicine Canal Road Jammu- 180001 India
| |
Collapse
|
15
|
Donthiboina K, Namballa HK, Shaik SP, Nanubolu JB, Shankaraiah N, Kamal A. Iodine promoted dual oxidative C(sp 3)-H amination of 2-methyl-3-arylquinazolin-4(3H)-ones: a facile route to 1,4-diarylimidazo[1,5-a]quinazolin-5(4H)-ones. Org Biomol Chem 2018; 16:1720-1727. [PMID: 29457816 DOI: 10.1039/c7ob02677c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An iodine promoted tandem oxidative condensation of benzylamines and 2-methylquinazolin-4-(3H)-ones was developed to yield imidazo[1,5-a]quinazolin-5(4H)-ones via dual C(sp3)-H amination under metal free conditions in a greener way using molecular oxygen as a terminal oxidant. This tandem transformation provides an efficient approach to construct various functionalized imidazo[1,5-a]quinazolin-5(4H)-ones in a straightforward manner via a sequential amination-oxidation-annulation-aromatisation.
Collapse
Affiliation(s)
- Kavitha Donthiboina
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad-500 037, India.
| | | | | | | | | | | |
Collapse
|
16
|
Shaik SP, Sultana F, Ravikumar A, Sunkari S, Alarifi A, Kamal A. Regioselective oxidative cross-coupling of benzo[d]imidazo[2,1-b]thiazoles with styrenes: a novel route to C3-dicarbonylation. Org Biomol Chem 2018; 15:7696-7704. [PMID: 28872171 DOI: 10.1039/c7ob01778b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel I2 promoted, highly efficient metal-free and peroxide-free greener domino protocol for the C3-dicarbonylation of benzo[d]imidazo[2,1-b]thiazoles (IBTs) with styrenes has been developed via oxidative cleavage of the C(sp2)-H bond, followed by C3-nucleophilic attack of IBT and oxidation. Interestingly, under these conditions 2-(benzo[d]imidazo[2,1-b]thiazol-2-yl)aniline gave the benzo[4',5']thiazolo[2',3':2,3]imidazo[4,5-c]quinoline derivative via oxidative cleavage of the C(sp2)-H bond, followed by Pictet-Spengler cyclization and aromatization. This method offers the advantages of broad substrate scope, ecofriendly feature and high atom economy apart from higher yields.
Collapse
Affiliation(s)
- Siddiq Pasha Shaik
- Medicinal Chemistry and Biotechnology Division, CSIR-Indian Institute of Chemical Technology (IICT), Hyderabad-500007, India.
| | | | | | | | | | | |
Collapse
|
17
|
Bora P, Bez G. Chemoselective isocyanide insertion into the N–H bond using iodine–DMSO: metal-free access to substituted ureas. Chem Commun (Camb) 2018; 54:8363-8366. [DOI: 10.1039/c8cc05019h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A chemoselective metal-free method for isocyanide insertion into amines is developed to synthesize symmetrical and unsymmetrical ureas.
Collapse
Affiliation(s)
- Porag Bora
- Department of Chemistry
- North Eastern Hill University
- Shillong-793022
- India
| | - Ghanashyam Bez
- Department of Chemistry
- North Eastern Hill University
- Shillong-793022
- India
| |
Collapse
|
18
|
Mani GS, Rao AVS, Tangella Y, Sunkari S, Sultana F, Namballa HK, Shankaraiah N, Kamal A. Molecular iodine-catalysed oxidative CO–C(alkyl) bond cleavage of aryl/heteroaryl alkyl ketones: an efficient strategy to access fused polyheterocycles. NEW J CHEM 2018. [DOI: 10.1039/c8nj03417f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
An efficient molecular iodine-catalysed one-pot strategy has been accomplished for the construction of various fused heterocycles under metal and oxidant free conditions.
Collapse
Affiliation(s)
- Geeta Sai Mani
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research
- Hyderabad-500037
- India
| | - Ayanampudi Venkata Subba Rao
- Division of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | - Yellaiah Tangella
- Division of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | - Satish Sunkari
- Division of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | - Faria Sultana
- Division of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | - Hari Krishna Namballa
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research
- Hyderabad-500037
- India
| | - Nagula Shankaraiah
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research
- Hyderabad-500037
- India
| | - Ahmed Kamal
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research
- Hyderabad-500037
- India
- Division of Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
| |
Collapse
|