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Zhang ZZ, Sun CL, Zhang XH, Zhang XG. Base-promoted thioannulation of o-alkynyl oxime ethers with sodium sulfide for the general synthesis of isothiocoumarins. Org Biomol Chem 2021; 19:10174-10180. [PMID: 34787150 DOI: 10.1039/d1ob02012a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A general and efficient strategy for the one-pot synthesis of isothiocoumarin-1-ones has been developed via the base-promoted 6-endo-dig thioannulation of o-alkynyl oxime ethers using the cheap and readily available Na2S as the sulfur source. Mechanistic studies disclosed that the reaction proceeded through two C-S bond formations, N-O bond cleavage and the final hydrolysis of imines.
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Affiliation(s)
- Zhu-Zhu Zhang
- College of chemical and materials engineering, Wenzhou University, Wenzhou 325035, China.
| | - Cai-Ling Sun
- College of chemical and materials engineering, Wenzhou University, Wenzhou 325035, China.
| | - Xiao-Hong Zhang
- College of chemical and materials engineering, Wenzhou University, Wenzhou 325035, China.
| | - Xing-Guo Zhang
- College of chemical and materials engineering, Wenzhou University, Wenzhou 325035, China.
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2
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Zhang B, Li X, Li X, Sun F, Du Y. Synthesis of
3‐Methylthio
‐benzo[
b
]furans/Thiophenes
via
Intramolecular Cyclization of
2‐Alkynylanisoles
/Sulfides Mediated by
DMSO
/
DMSO
‐
d
6
and
SOCl
2
. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000566] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Beibei Zhang
- Tianjin Key Laboratory for Modern Drug Delivery & High‐Efficiency, School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 China
| | - Xiaoxian Li
- Tianjin Key Laboratory for Modern Drug Delivery & High‐Efficiency, School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 China
| | - Xuemin Li
- Tianjin Key Laboratory for Modern Drug Delivery & High‐Efficiency, School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 China
| | - Fengxia Sun
- College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology Hebei Research Center of Pharmaceutical and Chemical Engineering Shijiazhuang Hebei 050018 China
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High‐Efficiency, School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 China
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3
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[bmIm]OH catalyzed coupling: Green and efficient synthesis of 2,8 dioxacyclopenta [ a ] inden-3-one derivatives in an aqua media. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.09.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Wan D, Yang Y, Liu X, Li M, Zhao S, You J. Radical Cyclization of Arenesulfonyl Chlorides and Alkynes: A Rapid Access to π-Conjugated Benzothiophenes. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501439] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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5
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Chemo-enzymatic synthesis of new resveratrol-related dimers containing the benzo[b]furan framework and evaluation of their radical scavenger activities. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.11.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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6
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Han JS, Shao YL, Zhang XH, Zhong P. A Green and Efficient Approach for the Synthesis of 3-Chalcogen Benzo[b]Furans via I2-Mediated Cascade Annulation Reaction of 2-Alkynylanisoles at Room Temperature in Water. PHOSPHORUS SULFUR 2013. [DOI: 10.1080/10426507.2013.770738] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Jiang-Sheng Han
- a College of Chemical and Materials Engineering, Wenzhou University , Wenzhou , China
| | - Yin-Lin Shao
- a College of Chemical and Materials Engineering, Wenzhou University , Wenzhou , China
| | - Xiao-Hong Zhang
- a College of Chemical and Materials Engineering, Wenzhou University , Wenzhou , China
| | - Ping Zhong
- a College of Chemical and Materials Engineering, Wenzhou University , Wenzhou , China
- b Oujiang College, Wenzhou University , Wenzhou , China
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7
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Raji Reddy C, Krishna G, Kavitha N, Latha B, Shin DS. Access to 2,3-Disubstituted Benzofurans through One-Pot Acid-Catalyzed Nucleophilic Substitution/TBAF-Mediated Oxacycloisomerization. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200708] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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8
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Gay RM, Manarin F, Schneider CC, Barancelli DA, Costa MD, Zeni G. FeCl(3)-Diorganyl dichalcogenides promoted cyclization of 2-alkynylanisoles to 3-chalcogen benzo[b]furans. J Org Chem 2010; 75:5701-6. [PMID: 20704440 DOI: 10.1021/jo101126q] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A general synthesis of 3-chalcogen benzo[b]furans from the readily available 2-alkynylanisoles, via FeCl(3)/diorganyl dichalcogenides intramolecular cyclization, has been developed. Aryl and alkyl groups directly bonded to the chalcogen atom were used as cycling agents. The results revealed that the reaction significantly depends on the electronic effects of substituents in the aromatic ring bonded to the selenium atom of the diselenide species. We observed that the pathway of reaction was not sensitive to the nature of substituents in the aromatic ring of anisole since both the electron-donating and the electron-withdrawing groups delivered the products in similar yields. In addition, the obtained heterocycles were readily transformed to more complex products by using a chalcogen/lithium exchange reaction with n-BuLi followed by trapping of the lithium intermediate with aldehydes, furnishing the desired secondary alcohols in good yields.
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Affiliation(s)
- Rafaela M Gay
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios, CCNE, UFSM, Santa Maria-Rio Grande do Sul, Brazil 97105-900
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9
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Geary LM, Hultin PG. 2-Substituted Benzo[b]furans from (E)-1,2-Dichlorovinyl Ethers and Organoboron Reagents: Scope and Mechanistic Investigations into the One-Pot Suzuki Coupling/Direct Arylation. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000787] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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10
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Pokhodylo NT, Matiychuk VS, Obushak MD. Synthesis of isothiocoumarin derivatives. Chem Heterocycl Compd (N Y) 2010. [DOI: 10.1007/s10593-010-0484-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Brasca R, Kneeteman MN, Mancini PM, Fabian WM. Theoretical explanation of the regioselectivity of polar cycloaddition reactions between furan derivatives and Danishefsky’s diene. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.07.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Andrews B, Bullock K, Condon S, Corona J, Davis R, Grimes J, Hazelwood A, Tabet E. Solvent-Free Friedel–Crafts Cyclization with Trichloroacetic Anhydride. SYNTHETIC COMMUN 2009. [DOI: 10.1080/00397910802663394] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Pruitt VL, Berlin KD, Hirsch KS. SYNTHESIS OF SOME 3,4-DIHYDRO-2H-1-BENZOTHIOPYRAN-4-OLS. ORG PREP PROCED INT 2009. [DOI: 10.1080/00304949009458200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Cho CH, Neuenswander B, Lushington GH, Larock RC. Parallel synthesis of a multi-substituted benzo[b]furan library. ACTA ACUST UNITED AC 2008; 10:941-7. [PMID: 18937516 DOI: 10.1021/cc800120y] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The solution-phase parallel synthesis of a 121-member library of multi-substituted benzo[ b]furans is described. 2,3,5-Trisubstituted benzo[ b]furans have been prepared by the palladium-catalyzed substitution of 3-iodobenzofurans by Suzuki-Miyaura, carbonylative Suzuki, Sonogashira, Heck, and carboalkoxylation chemistry. The 3-iodobenzofurans are readily prepared in good to excellent yields by the palladium/copper-catalyzed cross-coupling of various o-iodoanisoles and terminal alkynes, followed by electrophilic cyclization with ICl.
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Affiliation(s)
- Chul-Hee Cho
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
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15
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Luca LD, Giacomelli G, Nieddu G. Synthesis of Substituted Benzofurans via Microwave-Enhanced Catch and Release Strategy. ACTA ACUST UNITED AC 2008; 10:517-20. [DOI: 10.1021/cc8000162] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lidia De Luca
- Dipartimento di Chimica, Università degli Studi di Sassari, via Vienna 2, I-07100, Italy
| | - Giampaolo Giacomelli
- Dipartimento di Chimica, Università degli Studi di Sassari, via Vienna 2, I-07100, Italy
| | - Giammario Nieddu
- Dipartimento di Chimica, Università degli Studi di Sassari, via Vienna 2, I-07100, Italy
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16
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17
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De Luca L, Giacomelli G, Nieddu G. A Facile Approach to the Synthesis of Chiral 2-Substituted Benzofurans. J Org Chem 2007; 72:3955-7. [PMID: 17419648 DOI: 10.1021/jo070142c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An effective route to chiral optically active 2-substituted benzofurans directly from carboxylic acids is reported. This procedure, which allows the preparation of alpha-alkyl-2-benzofuranmethanamines from N-protected alpha-amino acids without sensible racemization phenomena, proceeds in good yields under mild conditions with the help of microwave irradiation.
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Affiliation(s)
- Lidia De Luca
- Dipartimento di Chimica, Università degli Studi di Sassari, via Vienna 2, I-07100 Sassari, Italy
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18
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Dandia A, Sharma CS, Saha M. FACILE SYNTHESIS OF SOME NEW FLUORINE CONTAINING SPIRO [3H-INDOLE-3,2′TETRAHYDRO-1,3-THIAZINE].2,4′(1H)-DIONES. PHOSPHORUS SULFUR 2007. [DOI: 10.1080/10426509808035677] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Anshu Dandia
- a Department of Chemistry , University of Rajasthan , Jaipur, 302004, India
| | - C. S. Sharma
- a Department of Chemistry , University of Rajasthan , Jaipur, 302004, India
| | - Mitali Saha
- a Department of Chemistry , University of Rajasthan , Jaipur, 302004, India
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19
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Horton MN, Jarman M, Potter GA. Synthesis of [D5-ethyl]-tamoxifen; a mechanistic probe of tamoxifen induced hepatic DNA adduct formation. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580340810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Ziegert RE, Toräng J, Knepper K, Bräse S. The Recent Impact of Solid-Phase Synthesis on Medicinally Relevant Benzoannelated Oxygen Heterocycles. ACTA ACUST UNITED AC 2005; 7:147-69. [PMID: 15762741 DOI: 10.1021/cc049879v] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert E Ziegert
- Kekulé-Institut für Organische Chemie und Biochemie der Rheinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, D-53121 Bonn, Germany
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21
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Smith RA, Chen J, Mader MM, Muegge I, Moehler U, Katti S, Marrero D, Stirtan WG, Weaver DR, Xiao H, Carley W. Solid-Phase synthesis and investigation of benzofurans as selective estrogen receptor modulators. Bioorg Med Chem Lett 2002; 12:2875-8. [PMID: 12270167 DOI: 10.1016/s0960-894x(02)00613-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A library of benzofurans was prepared by solid-phase synthesis methods, and several analogues were identified as potent ligands for the estrogen receptors ER-alpha and ER-beta, with some compounds having selectivity for ER-alpha. Analogues designed to more closely mimic Raloxifene were less effective. Certain benzofurans were effective in a bone pit assay, but were characterized as agonists in a MCF-7 breast tumor cell proliferation assay.
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Affiliation(s)
- Roger A Smith
- Department of Chemistry Research, Bayer Research Center, 400Morgan Lane, West Haven, CT 06516, USA
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22
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Klein TR, Bergemann M, Yehia NAM, Fanghänel E. Versatile Route to Functionalized 1H-2-Benzothiopyrans and 1H-2-Naphthothiopyrans by Electrophilic Cyclization of Bis(arylmethylthio)acetylenes: 2-Benzo- and 2-Naphthothiopyrylium Salts. J Org Chem 1998. [DOI: 10.1021/jo972334l] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas R. Klein
- Department of Chemistry, Martin-Luther-University, Halle-Wittenberg, D-06099 Halle, Germany
| | - Marco Bergemann
- Department of Chemistry, Martin-Luther-University, Halle-Wittenberg, D-06099 Halle, Germany
| | - Nasser A. M. Yehia
- Department of Chemistry, Martin-Luther-University, Halle-Wittenberg, D-06099 Halle, Germany
| | - Egon Fanghänel
- Department of Chemistry, Martin-Luther-University, Halle-Wittenberg, D-06099 Halle, Germany
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23
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Grese TA, Sluka JP, Bryant HU, Cullinan GJ, Glasebrook AL, Jones CD, Matsumoto K, Palkowitz AD, Sato M, Termine JD, Winter MA, Yang NN, Dodge JA. Molecular determinants of tissue selectivity in estrogen receptor modulators. Proc Natl Acad Sci U S A 1997; 94:14105-10. [PMID: 9391160 PMCID: PMC28440 DOI: 10.1073/pnas.94.25.14105] [Citation(s) in RCA: 171] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Interaction of the estrogen receptor/ligand complex with a DNA estrogen response element is known to regulate gene transcription. In turn, specific conformations of the receptor-ligand complex have been postulated to influence unique subsets of estrogen-responsive genes resulting in differential modulation and, ultimately, tissue-selective outcomes. The estrogen receptor ligands raloxifene and tamoxifen have demonstrated such tissue-specific estrogen agonist/antagonist effects. Both agents antagonize the effects of estrogen on mammary tissue while mimicking the actions of estrogen on bone. However, tamoxifen induces significant stimulation of uterine tissue whereas raloxifene does not. We postulate that structural differences between raloxifene and tamoxifen may influence the conformations of their respective receptor/ligand complexes, thereby affecting which estrogen-responsive genes are modulated in various tissues. These structural differences are 4-fold: (A) the presence of phenolic hydroxyls, (B) different substituents on the basic amine, (C) incorporation of the stilbene moiety into a cyclic benzothiophene framework, and (D) the imposition of a carbonyl "hinge" between the basic amine-containing side chain and the olefin. A series of raloxifene analogs that separately exemplify each of these differences have been prepared and evaluated in a series of in vitro and in vivo assays. This strategy has resulted in the development of a pharmacophore model that attributes the differences in effects on the uterus between raloxifene and tamoxifen to a low-energy conformational preference imparting an orthogonal orientation of the basic side chain with respect to the stilbene plane. This three-dimensional array is dictated by a single carbon atom in the hinge region of raloxifene. These data indicate that differences in tissue selective actions among benzothiophene and triarylethylene estrogen receptor modulators can be ascribed to discrete ligand conformations.
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Affiliation(s)
- T A Grese
- Endocrine Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285, USA.
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25
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Hajela K, Kapoor KK, Kapil RS. Synthesis and post-coital contraceptive activity of ether and ester analogues of 2,3-diaryl-2H-1-benzopyrans. Bioorg Med Chem 1995; 3:1417-21. [PMID: 8634822 DOI: 10.1016/0968-0896(95)00117-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Ether and ester analogues of 2,3-diaryl-2H-1-benzopyrans have been synthesised and tested for their pregnancy inhibiting activity in immature rats. Some of the compounds exhibit potent activity. Structure-activity relationship relative to the hydroxy analogue has been discussed. In general, esters were found to be better inhibitory agents.
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Affiliation(s)
- K Hajela
- Regional Research Laboratory, Jammu Tawi, India
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26
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Miquel JF, Gilbert J. A chemical classification of nonsteroidal antagonists of sex-steroid hormone action. JOURNAL OF STEROID BIOCHEMISTRY 1988; 31:525-44. [PMID: 3059055 DOI: 10.1016/0022-4731(88)90004-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A highly varied collection of nonsteroids have been reported over the last forty years as being able to exert an antihormonal action versus steroid hormones in vivo. This diversity is partly explained by the manifold molecular targets of these compounds which may be either enzymes or receptors (leading to inhibition of steroid production and action respectively) and by the different possible levels of interference within feedback loops between the central nervous system, pituitary, gonads and other peripheral organs. The present chapter is a chemist's classification of some of these structures often in the absence of detailed biochemical data. Nonsteroid antiestrogens (and estrogens) most often share a common feature with diethylstilbestrol and consequently the effects of structural modifications on biological activities can be studied in a rational manner. This is not the case for non-steroidal antiandrogens that we have only been able to classify into conventional chemical groups. Nor have any true lead compounds nor well-defined chemical classes been identified for nonsteroid antiprogestogens. This is however the only hormonal class where natural products play an important role.
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Affiliation(s)
- J F Miquel
- Centre d'Etudes et de Recherches de Chimie Organique Appliquée (CERCOA)-C.N.R.S., Thiais, France
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Imam SK, Srivastava K, Dasgupta PR, Kar AB. Effect of 2-phenyl-3-p-(beta-pyrrolidinoethoxy) phenyl-beta-methoxy benzofuran hydrochloride (DBF) on the biochemistry of the fallopian tube and uterus of rhesus monkey (Macaca mulatta). Contraception 1975; 11:317-27. [PMID: 123189 DOI: 10.1016/0010-7824(75)90040-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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28
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Cagniant P, Cagniant D. Recent Advances in the Chemistry of Benzo[b]furan and Its Derivatives. Part I: Occurrence and Synthesis. ADVANCES IN HETEROCYCLIC CHEMISTRY VOLUME 18 1975. [DOI: 10.1016/s0065-2725(08)60132-4] [Citation(s) in RCA: 100] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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