1
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Gao H, Zhou L, Wan JP, Liu Y. Rongalite as C1 Synthon in the Synthesis of Divergent Pyridines and Quinolines. J Org Chem 2023. [PMID: 37171406 DOI: 10.1021/acs.joc.3c00428] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Rongalite has been used as a cheap and efficient carbon synthon for the synthesis of divergent N-heteroaromatics, including different pyridines and quinolines. The selective synthesis of different products can be achieved by employing enaminones or enaminones/anilines as reaction partners. In addition, compared with the reaction using conventional aldehyde synthons, rongalite displays an evident advantage in providing products with considerably higher product yields under milder conditions. The GC-MS analysis of the reaction process has been performed to probe the possible reaction mechanism.
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Affiliation(s)
- Huan Gao
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Liyun Zhou
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Jie-Ping Wan
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Yunyun Liu
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
- International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China
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2
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Peng S, Xie LY, Yang L. A visible-light-mediated cascade reaction of quinoxalin-2(1 H)-ones, alkenes, and sulfinic acids. Org Biomol Chem 2023; 21:4109-4113. [PMID: 37128965 DOI: 10.1039/d3ob00448a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A photocatalytic three-component cascade reaction of quinoxalin-2(1H)-ones, alkenes, and sulfinic acids under metal-, strong oxidant-, and external photocatalyst-free conditions was developed. The reaction was performed at room temperature using air as a green oxidant. Various sulfonated quinoxalin-2(1H)-ones were obtained in satisfactory yields with good functional group compatibility. The preliminary study showed that the current transformation was enabled by the formation of an electron donor-acceptor (EDA) complex between quinoxalin-2(1H)-ones and sulfinic acids.
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Affiliation(s)
- Sha Peng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry, Xiangtan University, Hunan, 411105, PR China
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Hunan, 425100, China.
| | - Long-Yong Xie
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Hunan, 425100, China.
| | - Luo Yang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry, Xiangtan University, Hunan, 411105, PR China
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3
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Wang Z, Zhang C, Wu J, Li B, Chrostowska A, Karamanis P, Liu SY. trans-Hydroalkynylation of Internal 1,3-Enynes Enabled by Cooperative Catalysis. J Am Chem Soc 2023; 145:5624-5630. [PMID: 36862947 PMCID: PMC10162690 DOI: 10.1021/jacs.3c00514] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
A cooperative catalyst system involving a Pd(0)/Senphos complex, tris(pentafluorophenyl)borane, copper bromide, and an amine base, is demonstrated to catalyze trans-hydroalkynylation of internal 1,3-enynes. For the first time, a Lewis acid catalyst is shown to promote the reaction involving the emerging outer-sphere oxidative reaction step. The resulting cross-conjugated dieneynes are versatile synthons for organic synthesis, and their characterization reveals distinct photophysical properties depending on the positioning of the donor/acceptor substituents along the conjugation path.
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Affiliation(s)
- Ziyong Wang
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, United States
| | - Chen Zhang
- Université de Pau et des Pays de l'Adour, E2S UPPA/CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux IPREM UMR 5254. Hélioparc, 2 Avenue P. Angot, 64053 Pau Cedex 09, France
| | - Jason Wu
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, United States
| | - Bo Li
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, United States
| | - Anna Chrostowska
- Université de Pau et des Pays de l'Adour, E2S UPPA/CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux IPREM UMR 5254. Hélioparc, 2 Avenue P. Angot, 64053 Pau Cedex 09, France
| | - Panaghiotis Karamanis
- Université de Pau et des Pays de l'Adour, E2S UPPA/CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux IPREM UMR 5254. Hélioparc, 2 Avenue P. Angot, 64053 Pau Cedex 09, France
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, United States
- Université de Pau et des Pays de l'Adour, E2S UPPA/CNRS, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux IPREM UMR 5254. Hélioparc, 2 Avenue P. Angot, 64053 Pau Cedex 09, France
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4
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Kotha S, Solanke BU. Construction of Unusual Amino Acid derivatives and Bis‐Fused Oxacycles via Ring‐Closing Metathesis. ChemistrySelect 2022. [DOI: 10.1002/slct.202203906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry Indian Institute of Technology–Bombay Powai Mumbai 400 076 India
| | - Balaji U. Solanke
- Department of Chemistry Indian Institute of Technology–Bombay Powai Mumbai 400 076 India
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5
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Kotha S, Singh D, Bandi V. Design and Synthesis of Urazole Derivatives via Ring Closing Metathesis. ChemistrySelect 2022. [DOI: 10.1002/slct.202203096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry Indian Institute of Technology-Bombay, Powai Mumbai 400 076 India
| | - Deepshikha Singh
- Department of Chemistry Indian Institute of Technology-Bombay, Powai Mumbai 400 076 India
| | - Vijayalakshmi Bandi
- Department of Chemistry Indian Institute of Technology-Bombay, Powai Mumbai 400 076 India
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6
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Gao S, Duan M, Andreola LR, Yu P, Wheeler SE, Houk KN, Chen M. Unusual Enantiodivergence in Chiral Brønsted Acid‐Catalyzed Asymmetric Allylation with β‐Alkenyl Allylic Boronates. Angew Chem Int Ed Engl 2022; 61:e202208908. [PMID: 35989224 DOI: 10.1002/anie.202208908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Indexed: 11/11/2022]
Abstract
We report herein a rare example of enantiodivergent aldehyde addition with β-alkenyl allylic boronates via chiral Brønsted acid catalysis. 2,6-Di-9-anthracenyl-substituted chiral phosphoric acid-catalyzed asymmetric allylation using β-vinyl substituted allylic boronate gave alcohols with R absolute configuration. The sense of asymmetric induction of the catalyst in these reactions is opposite to those in prior reports. Moreover, in the presence of the same acid catalyst, the reactions with β-2-propenyl substituted allylic boronate generated homoallylic alcohol products with S absolute configuration. Unusual substrate-catalyst C-H⋅⋅⋅π interactions in the favoured reaction transition state were identified as the origins of observed enantiodivergence through DFT computational studies.
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Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
- China Pharmaceutical University Nanjing 210009 China
| | - Meng Duan
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
- Department of Chemistry and Shenzhen Grubbs Institute Southern University of Science and Technology Shenzhen 518055 China
| | | | - Peiyuan Yu
- Department of Chemistry and Shenzhen Grubbs Institute Southern University of Science and Technology Shenzhen 518055 China
| | | | - Kendall N. Houk
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Ming Chen
- Department of Chemistry and Biochemistry Auburn University Auburn AL 36849 USA
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7
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Kotha S, Meher P. Expanding the Diversity of Pyridines Through Annulation of Keto and Diketo Compounds. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sambasivarao Kotha
- Indian Institute of Technology Department of Chemistry Powai 400 076 Mumbai INDIA
| | - Punam Meher
- Indian Institute of Technology Bombay chemistry INDIA
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8
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Gao S, Duan M, Andreola LR, Yu P, Wheeler SE, Houk KN, Chen M. Unusual Enantiodivergence in Chiral Brønsted Acid‐Catalyzed Asymmetric Allylation with β‐Alkenyl Allylic Boronates. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shang Gao
- Auburn University Chemistry and Biochemistry UNITED STATES
| | - Meng Duan
- University of California Los Angeles Chemistry and Biochemistry UNITED STATES
| | | | - Peiyuan Yu
- Southern University of Science and Technology Chemistry CHINA
| | | | - Kendall N. Houk
- University of California Los Angeles Chemistry and Biochemistry UNITED STATES
| | - Ming Chen
- Auburn University Chemistry and Biochemistry 179 chemistry building 36849 Auburn UNITED STATES
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9
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Golla S, Kokatla HP. Rongalite-Mediated Transition Metal- and Hydride-Free Chemoselective Reduction of α-Keto Esters and α-Keto Amides. J Org Chem 2022; 87:9915-9925. [PMID: 35839148 DOI: 10.1021/acs.joc.2c00936] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A transition metal- and hydride-free protocol has been developed for the chemoselective reduction of α-keto esters and α-keto amides using rongalite as a reducing agent. Here, rongalite acts as a hydride-free reducing agent via a radical mechanism. This protocol offers the synthesis of a wide range of α-hydroxy esters and α-hydroxy amides with 85-98% yields. This chemoselective method is compatible with other reducible functionalities such as halides, alkenes, amides, and nitriles. The use of inexpensive rongalite (ca. $0.03/1 g), mild reaction conditions, and gram-scale synthesis are some of the key features of this methodology. Also, cyclandelate, a vasodilator drug, has been synthesized in gram scale with 79% yield.
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Affiliation(s)
- Sivaparwathi Golla
- Department of Chemistry, National Institute of Technology Warangal, Warangal, Telangana 506004, India
| | - Hari Prasad Kokatla
- Department of Chemistry, National Institute of Technology Warangal, Warangal, Telangana 506004, India
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10
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Kotha S, Ansari S, Gupta NK. Annulation Tactics of cis-syn-cis Triquinanes by Allylsilanes: Application of Hosomi-Sakurai Reaction Conditions. Chem Asian J 2022; 17:e202200497. [PMID: 35796548 DOI: 10.1002/asia.202200497] [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: 05/14/2022] [Revised: 06/06/2022] [Indexed: 11/07/2022]
Abstract
A stereoselective [3+2] cycloaddition approach to functionalized pentaquinanes starting from cis-syn-cis triquinanes, derived from Cookson's diones, is reported. This transformation involves generation of six new stereocenters in a single step leading to cis-anti-cis-syn-cis-anti-cis polyquinane systems. Our method prevents transannular cyclizations which are prevalent in these moieties. The structure and stereochemistry of target molecules are well-characterized based on NMR data and X-ray diffraction studies.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai, 400076, India
| | - Saima Ansari
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai, 400076, India
| | - Naveen K Gupta
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai, 400076, India
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11
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Golla S, Jalagam S, Poshala S, Kokatla HP. Transition metal-free functionalization of 2-oxindoles via sequential aldol and reductive aldol reactions using rongalite as a C1 reagent. Org Biomol Chem 2022; 20:4926-4932. [PMID: 35506377 DOI: 10.1039/d2ob00665k] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A sequential one-pot classical aldol, transition-metal and hydride-free reductive aldol reaction is reported here for C(sp3)- H functionalization of 2-oxindoles using the multifaceted reagent rongalite. Here, rongalite functions as a hydride-free reducing agent and double C1 unit donor. This protocol enables the synthesis of a wide range of 3-methylindoline-2-ones and 3-(hydroxymethyl)-3-methylindolin-2-ones from 2-oxindoles (65-95% yields), which are the synthetic precursors for many natural products. Some of the important aspects of this synthetic approach include one-pot methylation and hydroxymethylation, low-cost rongalite (ca. $0.03 per 1 g), mild reaction conditions and applicability to gram-scale synthesis.
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Affiliation(s)
- Sivaparwathi Golla
- Department of Chemistry, National Institute of Technology Warangal, Warangal, Telangana-506004, India.
| | - Swathi Jalagam
- Department of Chemistry, National Institute of Technology Warangal, Warangal, Telangana-506004, India.
| | - Soumya Poshala
- Department of Chemistry, National Institute of Technology Warangal, Warangal, Telangana-506004, India.
| | - Hari Prasad Kokatla
- Department of Chemistry, National Institute of Technology Warangal, Warangal, Telangana-506004, India.
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12
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Kotha S, Agrawal A, Tangella Y. Synthesis of mixed musks via Eschenmoser-Tanabe fragmentation, enyne metathesis and Diels-Alder reaction as key steps. RSC Adv 2022; 12:14278-14281. [PMID: 35558836 PMCID: PMC9092383 DOI: 10.1039/d2ra01458k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Accepted: 05/02/2022] [Indexed: 12/03/2022] Open
Abstract
Musk analogues containing different macrocyclic ring systems as well as different annulated ring systems were synthesised by a simple and useful strategy. This strategy includes Eschenmoser-Tanabe fragmentation, enyne metathesis and Diels-Alder reaction as key steps. Starting from easily available (n) macrocyclic ketones, (n + 3) macrocyclic systems were assembled using the basic organic reactions.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai Mumbai 400076 Maharashtra India
| | - Arpit Agrawal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai Mumbai 400076 Maharashtra India
| | - Yellaiah Tangella
- Department of Chemistry, Indian Institute of Technology Bombay, Powai Mumbai 400076 Maharashtra India
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13
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Kotha S, Solanke BU. Modular Approach to Benzofurans, 2H-Chromenes and Benzoxepines via Claisen Rearrangement and Ring-Closing Metathesis: Access to Phenylpropanoids. Chem Asian J 2022; 17:e202200084. [PMID: 35218606 DOI: 10.1002/asia.202200084] [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: 01/27/2022] [Revised: 02/25/2022] [Indexed: 11/07/2022]
Abstract
Benzofurans, 2 H -chromenes and benzoxepines are key structural elements present in several natural products and pharmaceuticals. Here, we describe an easy-to-execute strategy for the synthesis of benzofurans, 2 H -chromenes and benzoxepines, by employing Claisen rearrangement and ring-closing metathesis as key steps. A variety of phenols were converted into useful oxacycles in good to excellent yields. The ring-closing metathesis approach has been used to produce phenylpropanoid natural products. Examples described here include, the naturally occurring benzofurans such as 7-methoxywutaifuranal, 7-methoxywutaifuranol, 7-methoxywutaifuranate and the O -prenylated natural products like boropinic acid, boropinols A and C.
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Affiliation(s)
- Sambasivarao Kotha
- Indian Institute of Technology, Department of Chemistry, Powai, 400 076, Mumbai, INDIA
| | - Balaji U Solanke
- Indian Institute of Technology Bombay, Chemistry, 400076, Mumbai, INDIA
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14
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Yuan Z, Zhang S, Teng F, Jin X, Sheng W, Gui Q. Iodide Salt Mediated Synthesis of
β
‐Keto Sulfones Using Arylsulfonyl Chlorides as the Sulfur Sources. ChemistrySelect 2022. [DOI: 10.1002/slct.202103355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Zhi‐ying Yuan
- School of pharmacy Hunan University of Chinese Medicine Changsha 410208 People's Republic of China
| | - Shuai Zhang
- School of pharmacy Hunan University of Chinese Medicine Changsha 410208 People's Republic of China
| | - Fan Teng
- College of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
| | - Xue‐Feng Jin
- College of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
| | - Wen‐bing Sheng
- School of pharmacy Hunan University of Chinese Medicine Changsha 410208 People's Republic of China
| | - Qing‐Wen Gui
- College of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
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15
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Ali R, Ahmed W, Jayant V, alvi S, Ahmed N, Ahmed A. Metathesis reactions in total‐ and natural product fragments syntheses. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100753] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rashid Ali
- Jamia Millia Islamia New Delhi India 110025 Department of Chemistry Jamia Nagar,New Delhi india110025 110025 New Delhi INDIA
| | - Waqar Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Vikrant Jayant
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - shakeel alvi
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Nadeem Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Azeem Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
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16
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Golla S, Anugu N, Jalagam S, Kokatla HP. Rongalite-induced transition-metal and hydride-free reductive aldol reaction: a rapid access to 3,3'-disubstituted oxindoles and its mechanistic studies. Org Biomol Chem 2022; 20:808-816. [PMID: 34994750 DOI: 10.1039/d1ob02284a] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A transition-metal and hydride-free reductive aldol reaction has been developed for the synthesis of biologically active 3,3'-disubstituted oxindoles from isatin derivatives using rongalite. In this protocol, rongalite plays a dual role as a hydride-free reducing agent and a C1 unit donor. This transition metal-free method enables the synthesis of a wide range of 3-hydroxy-3-hydroxymethyloxindoles and 3-amino-3-hydroxymethyloxindoles with 79-96% yields. One-pot reductive hydroxymethylation, inexpensive rongalite (ca. $0.03/1 g), mild reaction conditions and short reaction time are some of the key features of this synthetic method. This protocol is also applicable to gram scale synthesis.
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Affiliation(s)
- Sivaparwathi Golla
- Department of Chemistry, National Institute of Technology Warangal, Warangal, Telangana-506004, India.
| | - Naveenkumar Anugu
- Department of Chemistry, National Institute of Technology Warangal, Warangal, Telangana-506004, India.
| | - Swathi Jalagam
- Department of Chemistry, National Institute of Technology Warangal, Warangal, Telangana-506004, India.
| | - Hari Prasad Kokatla
- Department of Chemistry, National Institute of Technology Warangal, Warangal, Telangana-506004, India.
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17
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Kotha S, Gupta NK, Ansari S. One-pot thiol-free synthetic approach to sulfides, and sulfoxides selectively. RSC Adv 2022; 12:25154-25162. [PMID: 36199306 PMCID: PMC9443682 DOI: 10.1039/d2ra04872h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 08/25/2022] [Indexed: 11/21/2022] Open
Abstract
A facile and efficient thiol-free one-pot method for direct synthesis of sulfides and sulfoxides under green conditions without using any metal catalyst is reported. For this purpose, we used benzyl bromides as starting materials in the presence of potassium thioacetate (PTA) and Oxone® which are low-cost, and readily accessible chemicals. This method is highly compatible with a variety of functional groups and delivered a series of sulfides, bis-sulfides, and sulfoxides in good yields. The selective formation of sulfoxides over sulfones is discussed via a mechanism. A facile and efficient thiol-free one-pot method for direct synthesis of sulfides and sulfoxides under green conditions without using any metal catalyst is reported.![]()
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Naveen Kumar Gupta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Saima Ansari
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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18
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Geng M, Kuang J, Fang W, Miao M, Ma Y. Facile construction of C, N-disulfonated 5-amino pyrazoles through an iodine-catalyzed cascade reaction. Org Biomol Chem 2022; 20:8187-8191. [DOI: 10.1039/d2ob01647h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A green and facile synthesis of previously unreported C,N-disulfonated 5-amino pyrazoles was established through an iodine-catalyzed cascade reaction.
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Affiliation(s)
- Meiqi Geng
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China
| | - Jinqiang Kuang
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China
| | - Weiwei Fang
- International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University (NFU), Nanjing 210037, China
| | - Maozhong Miao
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Yongmin Ma
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China
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19
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Kotha S, Keesari RR. A Modular Approach to Angularly Fused Polyquinanes via Ring-Rearrangement Metathesis: Synthetic Access to Cameroonanol Analogues and the Basic Core of Subergorgic Acid and Crinipellin. J Org Chem 2021; 86:17129-17155. [PMID: 34788028 DOI: 10.1021/acs.joc.1c02258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We describe a modular approach to angularly fused polyquinanes that are core units of many natural products such as cameroonanol, subergorgic acid, and crinepellin, etc. in excellent yields by employing atom-economic ring-rearrangement metathesis as a key step. Our work highlights, the synthesis of cameroonanol analogues 1-6 and their ester derivatives by using the stereoselective reduction of the carbonyl group by using DIBAL-H- and DCC-mediated coupling as the key reactions. The subergorgic acid core 7 was produced by LDA-mediated kinetically controlled regio- and stereoselective ring-junction allylation as a critical step. Moreover, it is worth mentioning that the present strategy relies on a less explored exo-dicyclopentadiene-1-one (8) and produces highly congested polycyclic frameworks containing up to seven contiguous stereogenic centers including quaternary carbons up to two. All of the new molecules were characterized by NMR data. The structure and relative stereochemistry of some compounds were confirmed by chemical methods and further supported by single-crystal X-ray diffraction studies. The newly reported tri- and tetraquinane skeletons are present in many naturally occurring bioactive polyquinanes. Hence, this strategy is useful for designing various "druglike molecules" and expands the chemical space of cyclopentanoids that are useful in medicinal chemistry.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400 076, India
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20
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Kotha S, Keesari RR. Synthetic Approaches to Crinipellin Based Tetraquinanes via Ring‐Rearrangement Metathesis and Ring‐Closing Metathesis. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry Indian Institute of Technology – Bombay Powai Mumbai 400 076 India
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21
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Kotha S, Agrawal A, Ansari S. Synthesis of Angular Triquinane and [4.3.3]Propellane Derivatives via Ring‐Rearrangement Olefin Metathesis. ChemistrySelect 2021. [DOI: 10.1002/slct.202103226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sambasivarao Kotha
- Arpit Agrawal Saima Ansari Department of Chemistry Indian Institute of Technology, Bombay Powai Mumbai Maharashtra India 400076
| | - Arpit Agrawal
- Arpit Agrawal Saima Ansari Department of Chemistry Indian Institute of Technology, Bombay Powai Mumbai Maharashtra India 400076
| | - Saima Ansari
- Arpit Agrawal Saima Ansari Department of Chemistry Indian Institute of Technology, Bombay Powai Mumbai Maharashtra India 400076
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22
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Kotha S, Fatma A. Synthetic Approach to Oxacycles via the Application of Ring‐Rearrangement Metathesis. ChemistrySelect 2021. [DOI: 10.1002/slct.202102096] [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]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry Indian Institute of Technology-Bombay Powai Mumbai 400076 India
| | - Ambareen Fatma
- Department of Chemistry Indian Institute of Technology-Bombay Powai Mumbai 400076 India
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23
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Chen J, Chen D, Kuang J, Ma Y. Transition Metal-Free De Novo Synthesis of Sulfonated Pyrazoles from Sulfonyl Hydrazides, 1,3-Diketones, and Sodium Sulfinates at Room Temperature. J Org Chem 2021; 86:9289-9298. [PMID: 34185538 DOI: 10.1021/acs.joc.1c00171] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A transition metal-free method for de novo construction of diverse sulfonated pyrazoles from readily available sulfonyl hydrazides, 1,3-diketones, and sodium sulfinates was established under mild conditions. Pyrazoles bearing two different sulfonyl groups were obtained in one step. The method features a diversity of substituents of the pyrazole products and a remarkably simple work-up.
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Affiliation(s)
- Jiawen Chen
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, P. R. China
| | - Dongwei Chen
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, P. R. China
| | - Jinqiang Kuang
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, P. R. China.,Institute of Advanced Studies, Taizhou University, Taizhou 318000, P. R. China
| | - Yongmin Ma
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, P. R. China.,Institute of Advanced Studies, Taizhou University, Taizhou 318000, P. R. China
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24
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Ren S, Wang Y, Liu J, Qiu G. Arylsulfonylative spiro-Tricyclization of N-Hydroxylethyl- N-arylpropiolamides. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202104046] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Peng Z, Hong YY, Peng S, Xu XQ, Tang SS, Yang LH, Xie LY. Photosensitizer-free synthesis of β-keto sulfones via visible-light-induced oxysulfonylation of alkenes with sulfonic acids. Org Biomol Chem 2021; 19:4537-4541. [PMID: 33949605 DOI: 10.1039/d1ob00552a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A practical and environment-friendly methodology for the construction of β-keto sulfones through visible-light induced direct oxysulfonylation of alkenes with sulfonic acids at ambient temperature under open-air conditions was developed. Most importantly, the reaction proceeded smoothly without the addition of any photocatalyst or strong oxidant, ultimately minimizing the production of chemical waste.
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Affiliation(s)
- Zhen Peng
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Yun-Yun Hong
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Sha Peng
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Xiang-Qun Xu
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Shan-Shan Tang
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Li-Hua Yang
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
| | - Long-Yong Xie
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425100, China.
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26
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Ali R. New Dimensions in Rongalite Chemistry: The Land of Opportunities in Organic Synthesis and Material Sciences. ChemistrySelect 2020. [DOI: 10.1002/slct.202002878] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Rashid Ali
- Department of Chemistry, Jamia Millia Islamia Jamia Nagar (Okhla) New Delhi 110025 India
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27
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Kotha S, Fatma A. Construction of [5/7/5] Fused Tricyclic Sulfones via Ring‐Rearrangement Metathesis. ChemistrySelect 2020. [DOI: 10.1002/slct.201904381] [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)
- Sambasivarao Kotha
- Department of Chemistry Indian Institute of Technology-Bombay Powai, Mumbai 400076 India
| | - Ambareen Fatma
- Department of Chemistry Indian Institute of Technology-Bombay Powai, Mumbai 400076 India
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28
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Rongalite-promoted metal-free aerobic ipso-hydroxylation of arylboronic acids under sunlight: DFT mechanistic studies. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151539] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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29
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Khan I, Zaib S, Ibrar A. New frontiers in the transition-metal-free synthesis of heterocycles from alkynoates: an overview and current status. Org Chem Front 2020. [DOI: 10.1039/d0qo00698j] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review highlights the successful utilization of transition-metal-free approaches for the modular assembly of various heterocycles from alkynoates.
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Affiliation(s)
- Imtiaz Khan
- Department of Chemistry
- School of Natural Sciences
- The University of Manchester
- Manchester M13 9PL
- UK
| | - Sumera Zaib
- Department of Biochemistry
- Faculty of Life Sciences
- University of Central Punjab
- Lahore-54590
- Pakistan
| | - Aliya Ibrar
- Department of Chemistry
- Faculty of Natural Sciences
- The University of Haripur
- Haripur, KPK-22620
- Pakistan
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30
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Kotha S, Chavan AS, Goyal D. Diversity-Oriented Approaches to Polycycles and Heterocycles via Enyne Metathesis and Diels-Alder Reaction as Key Steps. ACS OMEGA 2019; 4:22261-22273. [PMID: 31909309 PMCID: PMC6941206 DOI: 10.1021/acsomega.9b03020] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 11/29/2019] [Indexed: 06/10/2023]
Abstract
Enyne metathesis (EM) has extensively been used to prepare diverse polycycles and heterocycles. EM in combination with Diels-Alder (DA) reaction has been used to prepare densely functionalized targets in a simple manner. In this mini-review, we discuss the various diversity-oriented approaches reported from our laboratory to prepare a variety of organic frameworks by a synergistic combination of EM and DA reactions. Some of the end products are useful intermediates for the synthesis of complex organic targets.
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Affiliation(s)
- Sambasivarao Kotha
- Department
of Chemistry, Indian Institute of Technology
Bombay, Mumbai 400076, India
| | - Arjun S. Chavan
- Department
of Chemistry, Thakur College of Science and Commerce Kandivali (E), Mumbai 400101, India
| | - Deepti Goyal
- Department
of Chemistry, Faculty of Basic and Applied Sciences, Sri Guru Granth Sahib World University, Fatehgarh Sahib, 140406 Punjab India
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31
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Synthetic applications of rongalite: A green tool in the service of Diels–Alder chemistry and beyond. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.01.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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32
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Yang T, Kou P, Jin F, Song XR, Bai J, Ding H, Xiao Q, Liang YM. TFA-promoted sulfonation/cascade cyclization of 2-propynolphenols with sodium sulfinates to 4-sulfonyl 2H-chromenes under metal-free conditions. Org Chem Front 2019. [DOI: 10.1039/c9qo00712a] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, efficient and metal-free cascade sulfonylation/cyclization of 2-propynolphenols with commercially available sodium sulfinates was developed for the synthesis of 4-sulfonyl 2H-chromenes under mild conditions.
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Affiliation(s)
- Tao Yang
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Peihao Kou
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Fengyan Jin
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Xian-Rong Song
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Jiang Bai
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Haixin Ding
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Qiang Xiao
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou 730000
- China
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33
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Poshala S, Thunga S, Manchala S, Kokatla HP. In Situ Generation of Copper Nanoparticles by Rongalite and Their Use as Catalyst for Click Chemistry in Water. ChemistrySelect 2018. [DOI: 10.1002/slct.201802584] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Soumya Poshala
- Department of Chemistry; National Institute of Technology Warangal, Telangana; 506004 India
| | - Sanjeeva Thunga
- Department of Chemistry; National Institute of Technology Warangal, Telangana; 506004 India
| | - Saikumar Manchala
- Department of Chemistry; National Institute of Technology Warangal, Telangana; 506004 India
| | - Hari Prasad Kokatla
- Department of Chemistry; National Institute of Technology Warangal, Telangana; 506004 India
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34
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Wang L, Wei W, Yang D, Cui H, Yue H, Wang H. Direct cross-coupling of aryl alkynyliodines with arylsulfinic acids leading to alkynyl sulfones under catalyst-free conditions. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.11.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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35
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Kotha S, Sreevani G. A Short Synthetic Route to Benzosultine-sulfone using Rongalite and [2+2+2]-Cyclotrimerization. ChemistrySelect 2017. [DOI: 10.1002/slct.201702348] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry; Indian Institute of Technology-Bombay, Powai; Mumbai-400076 India
| | - Gaddamedi Sreevani
- Department of Chemistry; Indian Institute of Technology-Bombay, Powai; Mumbai-400076 India
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36
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Wei W, Cui H, Yang D, Liu X, He C, Dai S, Wang H. Metal-free molecular iodine-catalyzed direct sulfonylation of pyrazolones with sodium sulfinates leading to sulfonated pyrazoles at room temperature. Org Chem Front 2017. [DOI: 10.1039/c6qo00403b] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and highly efficient iodine-catalyzed sulfonylation of pyrazolones with sodium sulfinates has been developed under mild and metal-free conditions.
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Affiliation(s)
- Wei Wei
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Huanhuan Cui
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Daoshan Yang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Xiaoxia Liu
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Chenglong He
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Shicui Dai
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Hua Wang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
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37
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Chuang TH, Chen YY, Huang YJ, Chuang CP. Manganese Salts Mediated Free-Radical Arylsulfonation-Cyclization of 2-(2-Alkynylphenyl)aminomaleates. ChemistrySelect 2016. [DOI: 10.1002/slct.201601471] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tsung-Han Chuang
- Department of Chemistry; National Cheng Kung University; 1 University Road Tainan,Taiwan 70101 Republic of China
| | - Ying-Yu Chen
- Department of Chemistry; National Cheng Kung University; 1 University Road Tainan,Taiwan 70101 Republic of China
| | - Yi-Jie Huang
- Department of Chemistry; National Cheng Kung University; 1 University Road Tainan,Taiwan 70101 Republic of China
| | - Che-Ping Chuang
- Department of Chemistry; National Cheng Kung University; 1 University Road Tainan,Taiwan 70101 Republic of China
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38
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Kotha S, Ravikumar O. Ring-Rearrangement-Metathesis Approach to Polycycles: Substrate-Controlled Stereochemical Outcome During Grignard Addition. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600596] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry; Indian Institute of Technology-Bombay; Powai India
| | - Ongolu Ravikumar
- Department of Chemistry; Indian Institute of Technology-Bombay; Powai India
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39
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Kotha S, Aswar VR, Manchoju A. A four-step route to synthetic equivalents of ortho-xylylenes: Dötz benzannulation, desilylation, bromo-dehydroxylation, and sultine formation. A concise approach to oxygenated linearly fused polycyclic aromatics. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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40
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Kotha S, Saifuddin M, Aswar VR. A diversity-oriented approach to indolocarbazoles via Fischer indolization and olefin metathesis: total synthesis of tjipanazole D and I. Org Biomol Chem 2016; 14:9868-9873. [DOI: 10.1039/c6ob01679k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
New synthetic strategies to indolocarbazoles have been reported via two-fold Fischer indolization under green conditions using l-(+)-tartaric acid and N,N-dimethyl urea.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry
- Indian Institute of Technology Bombay Powai
- Mumbai
- India
| | - Mohammad Saifuddin
- Department of Chemistry
- Indian Institute of Technology Bombay Powai
- Mumbai
- India
| | - Vikas R. Aswar
- Department of Chemistry
- Indian Institute of Technology Bombay Powai
- Mumbai
- India
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41
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42
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Kotha S, Chavan AS, Goyal D. Diversity-Oriented Approaches to Polycyclics and Bioinspired Molecules via the Diels-Alder Strategy: Green Chemistry, Synthetic Economy, and Beyond. ACS COMBINATORIAL SCIENCE 2015; 17:253-302. [PMID: 25875156 DOI: 10.1021/co500146u] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We describe diverse approaches to various dienes and their utilization in the Diels-Alder reaction to produce a variety of polycycles. The dienes covered here are prepared by simple alkylation reaction or via the Claisen rearrangement or by enyne metathesis of alkyne or enyne building blocks. Here, we have also included the Diels-Alder chemistry of dendralenes, a higher analog of cross-conjugated dienes. The present article is inclusive of o-xylylene derivatives that are generated in situ starting with benzosultine or benzosulfone derivatives. The Diels-Alder reaction of these dienes with various dienophiles gave diverse polycyclic systems and biologically important targets.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076 India
| | - Arjun S. Chavan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076 India
| | - Deepti Goyal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076 India
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43
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Wen J, Wei W, Xue S, Yang D, Lou Y, Gao C, Wang H. Metal-Free Oxidative Spirocyclization of Alkynes with Sulfonylhydrazides Leading to 3-Sulfonated Azaspiro[4,5]trienones. J Org Chem 2015; 80:4966-72. [PMID: 25928832 DOI: 10.1021/acs.joc.5b00361] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A novel and direct oxidative spirocyclization of arylpropiolamides with sulfonylhydrazides leading to 3-sulfonated azaspiro[4,5]trienones has been developed under metal-free conditions. The reaction is performed in a tandem manner constituted by the sequential sulfonylation of alkynes, ipso-carbocyclization, dearomatization, hydration, and oxidation processes, providing a convenient and efficient approach to various sulfonated azaspiro[4,5] trienones of biological importance.
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Affiliation(s)
- Jiangwei Wen
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Wei Wei
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Shengnan Xue
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Daoshan Yang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Yu Lou
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Chaoyang Gao
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Hua Wang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
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44
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Wei W, Liu X, Yang D, Dong R, Cui Y, Yuan F, Wang H. Direct difunctionalization of alkenes with sulfinic acids and NBS leading to β-bromo sulfones. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.02.043] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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45
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Kotha S, T. Waghule G. New Approach to Cyclophanes Containing Ethyleneoxy Bridge by Glaser–Eglinton Coupling. HETEROCYCLES 2015. [DOI: 10.3987/com-14-s(k)37] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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46
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Wei W, Wen J, Yang D, Guo M, Wang Y, You J, Wang H. Direct and metal-free arylsulfonylation of alkynes with sulfonylhydrazides for the construction of 3-sulfonated coumarins. Chem Commun (Camb) 2015; 51:768-71. [DOI: 10.1039/c4cc08117j] [Citation(s) in RCA: 169] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A novel and metal-free procedure has been developed for the construction of sulfonated coumarins via direct arylsulfonylation of alkynes with sulfonylhydrazides.
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Affiliation(s)
- Wei Wei
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Jiangwei Wen
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Daoshan Yang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Mengyuan Guo
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Yingying Wang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Jinmao You
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Hua Wang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
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47
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Kotha S, Bandarugattu VB, Krishna NG. Diversity-oriented approach to unusual amino acid derivatives and heterocycles via methyl 2-acetamidoacrylate and its congeners. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.05.056] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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48
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Wei W, Wen J, Yang D, Wu M, You J, Wang H. Iron-catalyzed direct difunctionalization of alkenes with dioxygen and sulfinic acids: a highly efficient and green approach to β-ketosulfones. Org Biomol Chem 2014; 12:7678-81. [DOI: 10.1039/c4ob01369g] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel and efficient iron-catalyzed direct difunctionalization of alkenes with sulfinic acids and dioxygen for the synthesis of β-ketosulfones has been developed.
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Affiliation(s)
- Wei Wei
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, China
| | - Jiangwei Wen
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, China
| | - Daoshan Yang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, China
| | - Min Wu
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, China
| | - Jinmao You
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, China
| | - Hua Wang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, China
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49
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Kotha S, Ali R. Diversity Oriented Approach to Spirobarbituric Acid Derivatives via a [2+2+2] Cycloaddition and Diels‒Alder Reaction as Key Steps. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)48] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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50
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Kotha S, Goyal D, Chavan AS. Diversity-Oriented Approaches to Unusual α-Amino Acids and Peptides: Step Economy, Atom Economy, Redox Economy, and Beyond. J Org Chem 2013; 78:12288-313. [DOI: 10.1021/jo4020722] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department
of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai 400 076, India
| | - Deepti Goyal
- Department
of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai 400 076, India
| | - Arjun S. Chavan
- Department
of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai 400 076, India
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