1
|
Atara HD, Brahmbhatt GC, Parmar VM, Parmar NJ, Gupta VK. A Chitosan‐CatalyzedDomino Aldol‐Hetero‐Diels‐Alder Synthesis of Cyclic Heptanoid‐Annulated Pyran Scaffolds. ChemistrySelect 2021. [DOI: 10.1002/slct.202103333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hiralben D. Atara
- Department of Chemistry Sardar Patel University, Vallabh Vidyanagar 388120. Dist. Anand Gujarat India
| | | | - Vishalkumar M. Parmar
- Department of Chemistry Sardar Patel University, Vallabh Vidyanagar 388120. Dist. Anand Gujarat India
| | - Narsidas J. Parmar
- Department of Chemistry Sardar Patel University, Vallabh Vidyanagar 388120. Dist. Anand Gujarat India
| | - Vivek K. Gupta
- P. G. Department of Physics University of Jammu Jammu Tawi 180006 India
| |
Collapse
|
2
|
Bakthadoss M, Vinayagam V. Construction of hybrid polycyclic quinolinobenzo[a]phenazinone architectures using solid-state melt reaction (SSMR). Mol Divers 2020; 25:2447-2458. [PMID: 32367313 DOI: 10.1007/s11030-020-10090-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 04/15/2020] [Indexed: 11/30/2022]
Abstract
An efficient and versatile protocol for the synthesis of hybrid polycyclic quinolinobenzo[a]phenazinones has been developed under SSMR condition via intramolecular domino Knoevenagel-hetero-Diels-Alder reaction involving the generation of two new six membered fused rings and three contiguous stereogenic centers.
Collapse
Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India.
| | - Varathan Vinayagam
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India
| |
Collapse
|
3
|
Wu M, Yang J, Luo F, Cheng C, Zhu G. Iron-catalyzed domino Knoevenagel-hetero-Diels-Alder reaction: facile access to oxabicyclo[3.3.1]nonene derivatives. Org Biomol Chem 2019; 17:5684-5687. [PMID: 31134253 DOI: 10.1039/c9ob00836e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A Fe-catalyzed domino Knoevenagel-hetero-Diels-Alder reaction of alkenyl aldehydes and 1,3-diketones has been developed. It provides straightforward access to a series of oxabicyclo[3.3.1]nonene derivatives in promising yields with excellent diastereoselectivity and functional group tolerance. The resultant bridged dihydropyrans can be smoothly converted into chromene derivatives, thus highlighting the synthetic utility of this method.
Collapse
Affiliation(s)
- Mingchang Wu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China.
| | | | | | | | | |
Collapse
|
4
|
Arredondo V, Roa DE, Yan S, Liu-Smith F, Van Vranken DL. Total Synthesis of (±)-Pestalachloride C and (±)-Pestalachloride D through a Biomimetic Knoevenagel/Hetero-Diels–Alder Cascade. Org Lett 2019; 21:1755-1759. [DOI: 10.1021/acs.orglett.9b00323] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Vanessa Arredondo
- Department of Chemistry, University of California, Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Daniel E. Roa
- Department of Chemistry, University of California, Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Songyuan Yan
- Department of Chemistry, University of California, Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Feng Liu-Smith
- Department of Medicine, School of Medicine, Chao Family Comprehensive Cancer Center, University of California Irvine, Irvine, California 92697, United States
| | - David L. Van Vranken
- Department of Chemistry, University of California, Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| |
Collapse
|
5
|
Gogoi D, Devi R, Pahari P, Sarma B, Das SK. cis-Diastereoselective synthesis of chroman-fused tetralins as B-ring-modified analogues of brazilin. Beilstein J Org Chem 2016; 12:2816-2822. [PMID: 28144354 PMCID: PMC5238543 DOI: 10.3762/bjoc.12.280] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 11/28/2016] [Indexed: 11/23/2022] Open
Abstract
We have synthesized a series of cis-6a,7,8,12b-tetrahydro-6H-naphtho[2,1-c]chromen-6a-ols as B-ring-modified analogues of (±)-brazilin. A completely regio- and cis-diastereoselective intramolecular Friedel–Crafts epoxy–arene cyclization of 1-tetralone-derived glycidyl ethers catalyzed by Brønsted acids was used as the key step. Our worries concerning the formation of cis–trans product mixtures and their probable conversion to naphthopyran derivatives via dehydration of the tertiary hydroxy group were laid to rest. Additionally, the angular hydroxy group of one of the synthesized products has been reductively removed by a diastereoselective method which should be useful in future for preparing libraries of chroman-fused tetralins with trans-stereochemistry at the ring junction.
Collapse
Affiliation(s)
- Dimpee Gogoi
- Department of Chemical Sciences, Tezpur University, Napaam, Tezpur 784028, Assam, India
| | - Runjun Devi
- Department of Chemical Sciences, Tezpur University, Napaam, Tezpur 784028, Assam, India
| | - Pallab Pahari
- Chemical Science and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, Assam, India
| | - Bipul Sarma
- Department of Chemical Sciences, Tezpur University, Napaam, Tezpur 784028, Assam, India
| | - Sajal Kumar Das
- Department of Chemical Sciences, Tezpur University, Napaam, Tezpur 784028, Assam, India
| |
Collapse
|
6
|
Parmar BD, Sutariya TR, Brahmbhatt GC, Parmar NJ, Kant R, Gupta VK. A Base-Catalyzed, Domino Aldol/hetero-Diels-Alder Synthesis of Tricyclic Pyrano[3,4-c]chromenes in Glycerol. J Org Chem 2016; 81:4955-64. [PMID: 27171909 DOI: 10.1021/acs.joc.6b00107] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The domino aldol/hetero-Diels-Alder synthesis of some new tricyclic pyrano[3,4-c]chromene derivatives has been achieved successfully after assembling a variety of acyclic or cyclic monoketones with prenyl ether-tethered aldehydes in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene in glycerol at 120 °C. The hitherto unreported stereochemical outcome of this synthetic sequence was studied and established on the basis of single-crystal X-ray diffraction data and 2D NMR NOESY spectroscopy along with the isolation and characterization of the intermediate Aldol condensation product.
Collapse
Affiliation(s)
- Bhagyashri D Parmar
- Department of Chemistry, Sardar Patel University , Vallabh Vidyanagar, Anand District, Gujarat 388120, India
| | - Tushar R Sutariya
- Department of Chemistry, Sardar Patel University , Vallabh Vidyanagar, Anand District, Gujarat 388120, India
| | - Gaurangkumar C Brahmbhatt
- Department of Chemistry, Sardar Patel University , Vallabh Vidyanagar, Anand District, Gujarat 388120, India
| | - Narsidas J Parmar
- Department of Chemistry, Sardar Patel University , Vallabh Vidyanagar, Anand District, Gujarat 388120, India
| | - Rajni Kant
- Post-Graduate Department of Physics, University of Jammu , Jammu Tawi 180006, India
| | - Vivek K Gupta
- Post-Graduate Department of Physics, University of Jammu , Jammu Tawi 180006, India
| |
Collapse
|
7
|
Shang XS, Li NT, Siyang HX, Liu PN. Palladium-Catalyzed Tandem Carbene Migratory Insertion and Intramolecular Cyclization: Synthesis of Chromeno[4,3-b]chromene Compounds. J Org Chem 2015; 80:4808-15. [DOI: 10.1021/acs.joc.5b00500] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xue Song Shang
- Shanghai Key Laboratory of
Functional Materials Chemistry, Key Lab for Advanced Materials and
Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai, China 200237
| | - Nian Tai Li
- Shanghai Key Laboratory of
Functional Materials Chemistry, Key Lab for Advanced Materials and
Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai, China 200237
| | - Hai Xiao Siyang
- Shanghai Key Laboratory of
Functional Materials Chemistry, Key Lab for Advanced Materials and
Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai, China 200237
| | - Pei Nian Liu
- Shanghai Key Laboratory of
Functional Materials Chemistry, Key Lab for Advanced Materials and
Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai, China 200237
| |
Collapse
|
8
|
Sutariya TR, Labana BM, Parmar BD, Parmar NJ, Kant R, Gupta VK. A domino synthetic approach for new, angular pyrazol- and isoxazol-heterocycles using [DBU][Ac] as an effective reaction medium. RSC Adv 2015. [DOI: 10.1039/c5ra00493d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Some new, angular pyrazol- and isoxazol-heterocycles have been synthesized by the reaction of pyrazolone/isoxazolone with typical ketone-based substrates—O-alkenyloxy/alkynyloxy-acetophenones.
Collapse
Affiliation(s)
| | | | | | | | - Rajni Kant
- Post Graduate Department of Physics
- University of Jammu
- Jammu Tawi-180006
- India
| | - Vivek K. Gupta
- Post Graduate Department of Physics
- University of Jammu
- Jammu Tawi-180006
- India
| |
Collapse
|
9
|
Microwave-induced domino-Knoevenagel-hetero Diels–Alder reaction—an easy route to di[1]benzopyrano[2,3-b:4′,3′-d]pyridine. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.095] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
10
|
Parvatkar PT, Kadam HK, Tilve SG. Intramolecular Diels–Alder reaction as a key step in tandem or sequential processes: a versatile tool for the synthesis of fused and bridged bicyclic or polycyclic compounds. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.02.048] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
11
|
Singh MS, Nagaraju A, Anand N, Chowdhury S. ortho-Quinone methide (o-QM): a highly reactive, ephemeral and versatile intermediate in organic synthesis. RSC Adv 2014. [DOI: 10.1039/c4ra11444b] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
In this critical review, we provide a comprehensive view of the chemistry of ortho-quinone methides as versatile reactive intermediates in organic synthesis.
Collapse
Affiliation(s)
- Maya Shankar Singh
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
| | - Anugula Nagaraju
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
| | - Namrata Anand
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
| | - Sushobhan Chowdhury
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
| |
Collapse
|
12
|
Xia L, Cai H, Lee YR. Catalyst-controlled regio- and stereoselective synthesis of diverse 12H-6,12-methanodibenzo[d,g][1,3]dioxocines. Org Biomol Chem 2014; 12:4386-96. [DOI: 10.1039/c4ob00691g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Regio- and stereoselective synthesis of 12H-6,12-methanodibenzo[d,g][1,3]dioxocines has been accomplished by the EDDA and PTSA-catalyzed cascade reactions of resorcinols and 2-hydroxychalcones.
Collapse
Affiliation(s)
- Likai Xia
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749, Republic of Korea
| | - Hongyun Cai
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749, Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749, Republic of Korea
| |
Collapse
|
13
|
Li X, Lee YR. Efficient and novel one-pot synthesis of polycycles bearing cyclols by FeCl3-promoted [2 + 2] cycloaddition: application to cannabicyclol, cannabicyclovarin, and ranhuadujuanine A. Org Biomol Chem 2014; 12:1250-7. [DOI: 10.1039/c3ob42110d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
Ghandi M, Taghi Nazeri M, Kubicki M. An efficient one-pot, regio- and stereoselective synthesis of novel pentacyclic-fused pyrano[3,2,c]chromenone or quinolinone benzosultone derivatives in water. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
15
|
Xia L, Rok Lee Y. New Synthetic Approaches to Naturally Occurring and Unnatural Pyranoflavones. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201200278] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
16
|
Synthesis of novel tetra- and pentacyclic benzosultam scaffolds via domino Knoevenagel hetero-Diels–Alder reactions in water. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2013. [DOI: 10.1007/s13738-013-0247-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
17
|
Parmar NJ, Pansuriya BR, Labana BM, Sutariya TR, Kant R, Gupta VK. Access to Some Angular Aminochromeno[2,3-c]pyrazole Precursors by a Domino Knoevenagel-hetero-Diels-Alder Reaction. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200751] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
18
|
Majumdar K, Taher A, Nandi RK. Synthesis of heterocycles by domino-Knoevenagel–hetero-Diels–Alder reactions. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.04.098] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
19
|
|
20
|
Parmar NJ, Patel RA, Teraiya SB, Sharma D, Gupta VK. Catalyst-and solvent-free one-pot synthesis of some novel polyheterocycles from aryldiazenyl salicylaldehyde derivatives. RSC Adv 2012. [DOI: 10.1039/c2ra00930g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
21
|
Venkatesham A, Rao RS, Nagaiah K, Yadav JS, RoopaJones G, Basha SJ, Sridhar B, Addlagatta A. Synthesis of new chromeno-annulated cis-fused pyrano[3,4-c]pyran derivatives via domino Knoevenagel–hetero-Diels–Alder reactions and their biological evaluation towards antiproliferative activity. MEDCHEMCOMM 2012. [DOI: 10.1039/c2md20023f] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
22
|
Narasimhulu M, Lee YR. Ethylenediamine diacetate-catalyzed three-component reaction for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones and their spirooxindole derivatives. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.08.018] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
23
|
Efficient synthesis of polycycles bearing prenylated, geranylated, and farnesylated citrans: application to 3′-prenylrubranine and petiolin D regioisomer. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.075] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
24
|
Ghandi M, Mohammadimehr E, Sadeghzadeh M, Bozcheloei AH. Efficient access to novel hexahydro-chromene and tetrahydro-pyrano[2,3-d]pyrimidine-annulated benzo-δ-sultones via a domino Knöevenagel-hetero-Diels–Alder reaction in water. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
25
|
Hari GS, Lee YR. Facile Synthesis of Pyranoxanthones, Dihydropyranoxanthones, and Their Analogues. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.8.2949] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
26
|
Parmar NJ, Teraiya SB, Patel RA, Talpada NP. Tetrabutylammonium hydrogen sulfate mediated domino reaction: synthesis of novel benzopyran-annulated pyrano[2,3-c]pyrazoles. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.03.108] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
27
|
Park BH, Lee YR, Kim SH. Efficient Synthesis of Bibenzyl Derivatives Bearing Pyranyl Moieties: First Total Synthesis of Bauhinol D. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.2.566] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
28
|
Six-Membered Ring Systems:. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/s0959-6380(11)22015-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
29
|
Jayagobi M, Raghunathan R. Diastereoselective synthesis of cis-fused pyrano[4,5-c]pyrrole derivatives via microwave-accelerated intramolecular Knoevenagal hetero Diels–Alder reaction. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.10.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
30
|
Lee HJ, Kim SH, Lee YR, Wang X, Lyoo WS. Concise Synthesis of Stemofurans A, C, and Derivatives. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.10.3027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
31
|
Lu D, Li Y, Gong Y. Organocatalytic Asymmetric Tandem Michael Addition−Hemiacetalization: A Route to Chiral Dihydrocoumarins, Chromanes, and 4H-Chromenes. J Org Chem 2010; 75:6900-7. [DOI: 10.1021/jo101446d] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Dengfu Lu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Yajun Li
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| |
Collapse
|
32
|
|
33
|
Substituent-controlled domino-Knoevenagel-hetero Diels–Alder reaction—a one-pot synthesis of polycyclic heterocycles. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.07.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
34
|
Hari GS, Lee YR, Wang X, Lyoo WS, Kim SH. New Synthetic Routes to Acronycine, Noracronycine, and Their Analogues. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.8.2406] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
35
|
Catalyst-free regioselective synthesis of benzopyran-annulated thiopyrano[2,3-b]thiochromen-5-(4H)-one derivatives by domino-Knoevenagel-hetero-Diels–Alder reaction of terminal alkynes with 4-hydroxy dithiocoumarin in aqueous medium. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.02.118] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
36
|
Deb ML, Bhuyan PJ. Synthesis of some novel annulated pyrido[2,3-d]pyrimidines via stereoselective intramolecular hetero Diels-Alder reactions of 1-oxa-1,3-butadienes. Beilstein J Org Chem 2010; 6:11. [PMID: 20485593 PMCID: PMC2871000 DOI: 10.3762/bjoc.6.11] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Accepted: 01/28/2010] [Indexed: 11/23/2022] Open
Abstract
Some novel annulated pyrido[2,3-d]pyrimidines 6 and 7 were synthesized stereoselectively by intramolecular hetero Diels-Alder reactions involving 1-oxa-1,3-butadienes.
Collapse
Affiliation(s)
- Mohit L Deb
- Medicinal Chemistry Division, North East Institute of Science & Technology, Jorhat 785006, Assam, India, Fax: 0376 2370011
| | - Pulak J Bhuyan
- Medicinal Chemistry Division, North East Institute of Science & Technology, Jorhat 785006, Assam, India, Fax: 0376 2370011
| |
Collapse
|
37
|
Tummatorn J, Ruchirawat S, Ploypradith P. A Convergent General Strategy for the Functionalized 2-Aryl Cycloalkyl-Fused Chromans: Intramolecular Hetero-Diels-Alder Reactions ofortho-Quinone Methides. Chemistry 2010; 16:1445-8. [DOI: 10.1002/chem.200902403] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
38
|
Majumdar K, Taher A, Ponra S. Catalyst-free domino-Knoevenagel-hetero-Diels–Alder reaction of terminal alkynes in water: an efficient one-step synthesis of indole-annulated thiopyranobenzopyran derivatives. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2009.10.108] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
39
|
Bakthadoss M, Sivakumar G, Kannan D. Solid-State Melt Reaction for the Domino Process: Highly Efficient Synthesis of Fused Tetracyclic Chromenopyran Pyrimidinediones Using Baylis−Hillman Derivatives. Org Lett 2009; 11:4466-9. [DOI: 10.1021/ol901228j] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manickam Bakthadoss
- Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, Tamilnadu, India
| | - Govindan Sivakumar
- Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, Tamilnadu, India
| | - Damodharan Kannan
- Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, Tamilnadu, India
| |
Collapse
|
40
|
Majumdar K, Taher A, Ray K. Domino-Knoevenagel-hetero-Diels–Alder reactions: an efficient one-step synthesis of indole-annulated thiopyranobenzopyran derivatives. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.04.054] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|