1
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Ferric Chloride Catalyzed 1,3-Rearrangement of (Phenoxymethyl)heteroarenes to (Heteroarylmethyl)phenols. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000419] [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]
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2
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Lei H, Wang L, Xu Z, Ye T. Regio- and Stereospecific Construction of 3a-(1H-Indol-3-yl)pyrrolidinoindolines and Application to the Formal Syntheses of Gliocladins B and C. Org Lett 2017; 19:5134-5137. [PMID: 28920696 DOI: 10.1021/acs.orglett.7b02425] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A one-pot regio- and stereospecific strategy for the construction of 3a-(3-indolyl)-hexahydropyrrolo[2,3-b]indoles based on the condensation of an indole and an in situ generated cyclopropylazetoindoline has been developed. This unified strategy works with a variety of substituted indoles to produce 3a-(3-indolyl)hexahydropyrrolo[2,3-b]indole products in high yields. The utility of this transformation was highlighted in the formal total syntheses of gliocladins B and C.
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Affiliation(s)
- Honghui Lei
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Xili, Nanshan District, Shenzhen 518055, China
| | - Lushun Wang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Xili, Nanshan District, Shenzhen 518055, China
| | - Zhengshuang Xu
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Xili, Nanshan District, Shenzhen 518055, China
| | - Tao Ye
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Xili, Nanshan District, Shenzhen 518055, China
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3
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Di Gregorio G, Mari M, Bartoccini F, Piersanti G. Iron-Catalyzed Direct C3-Benzylation of Indoles with Benzyl Alcohols through Borrowing Hydrogen. J Org Chem 2017; 82:8769-8775. [DOI: 10.1021/acs.joc.7b01603] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giovanni Di Gregorio
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
| | - Michele Mari
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
| | - Francesca Bartoccini
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
| | - Giovanni Piersanti
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
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4
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Nair RN, Rosnow JJ, Murphree TA, Bowden ME, Lindemann SR, Wright AT. De novo synthesis of alkyne substituted tryptophans as chemical probes for protein profiling studies. Org Chem Front 2017; 4:495-499. [PMID: 28944064 PMCID: PMC5607013 DOI: 10.1039/c6qo00819d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
De novo synthesis of alkynalted tryptophan moieties as chemical probes for protein profilling studies, via an unexpected synthesis of Michael acceptor 12 is reported. Friedel Craft's alkylation of 12 and alkyne substituted indoles gave alkynalated tryptophan moieties, which perform as chemical probe by incorporating into actively translating Escherichia coli cells, whereby the alkyne moiety enables multimodal analyses through click chemistry mediated attachment of reporting groups.
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Affiliation(s)
- R N Nair
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland. WA
- R. N. Nair. Current address - David Geffen School of Medicine, Department of Psychiatry and Behavorial Sciences, University of California, Los Angeles
| | - J J Rosnow
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland. WA
| | - T A Murphree
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland. WA
| | - M E Bowden
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland. WA
| | - S R Lindemann
- S. R. Lindemann. Current address - Department of Food Science, Purdue University, West Lafayette, IN
| | - A T Wright
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland. WA
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5
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Ortiz GX, Hemric BN, Wang Q. Direct and Selective 3-Amidation of Indoles Using Electrophilic N-[(Benzenesulfonyl)oxy]amides. Org Lett 2017; 19:1314-1317. [PMID: 28281340 DOI: 10.1021/acs.orglett.7b00358] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Selective C-H amidation of 1H-indoles at the C3 position is reported as a direct entry to biologically important 3-aminoindoles. This transformation is achieved using novel N-[(benzenesulfonyl)oxy]amides as electrophilic nitrogen agents in the presence of ZnCl2. Interestingly, analogous reactions in the absence of ZnCl2 resulted in the formation of indole aminal products.
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Affiliation(s)
- Gerardo X Ortiz
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Brett N Hemric
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Qiu Wang
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
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6
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Kumar K, More SS, Goyal S, Gangar M, Khatik GL, Rawal RK, Nair VA. A convenient synthesis of 4-alkyl-3-benzoylpyrroles from α,β-unsaturated ketones and tosylmethyl isocyanide. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.04.056] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Goyal S, Patel B, Sharma R, Chouhan M, Kumar K, Gangar M, Nair VA. An efficient strategy for the synthesis of syn 1,3-diols via iterative acetate aldol reactions and synthesis of atorvastatin lactone. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.08.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Zhu YF, Lu GP, Cai C. A Highly Regioselective C-3 Benzylation Reaction of Indoles with Alcohols Catalysed by an N-Heterocyclic Carbene. JOURNAL OF CHEMICAL RESEARCH 2015. [DOI: 10.3184/174751915x14376593652711] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The direct C-3 alkylation of indoles with primary and secondary alcohols through the combination of KOH and an N-heterocyclic carbene is described. The KOH/NHC-catalysed system can give desired C-3 alkylated indoles with high selectivity in moderate to excellent yields. Moreover, this process has obvious advantages such as high atom economy and the absence of a metal source.
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Affiliation(s)
- Yan-fang Zhu
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, P.R. China
| | - Guo-ping Lu
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, P.R. China
| | - Chun Cai
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, P.R. China
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9
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Laha JK, Dayal N, Singh S, Bhimpuria R. Dual Catalysis in DominoN-Benzylation/Intramolecular C-H Arylation: Regio- and Chemoselective Synthesis of Annelated Nitrogen Heterocycles. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402395] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Kumar V, Rachamalla M, Nandekar P, Khatik GL, Sangamwar AT, Tikoo K, Nair VA. Design and synthesis of optically pure 3-aryl-6-methyl-2-thioxotetrahydropyrimidin-4(1H)-ones as anti-prostate cancer agents. RSC Adv 2014. [DOI: 10.1039/c4ra06391k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
3-Aryl-6-methyl-2-thioxotetrahydropyrimidin-4(1H)-ones were designed and synthesized as a new class of anti-prostate cancer agents.
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Affiliation(s)
- Varun Kumar
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- Mohali, India
| | - Mahesh Rachamalla
- Department of Pharmacology and Toxicology
- National Institute of Pharmaceutical Education and Research
- Mohali, India
| | - Prajwal Nandekar
- Department of Pharmacoinformatics
- National Institute of Pharmaceutical Education and Research
- Mohali, India
| | - Gopal L. Khatik
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- Mohali, India
| | - Abhay T. Sangamwar
- Department of Pharmacoinformatics
- National Institute of Pharmaceutical Education and Research
- Mohali, India
| | - Kulbhushan Tikoo
- Department of Pharmacology and Toxicology
- National Institute of Pharmaceutical Education and Research
- Mohali, India
| | - Vipin A. Nair
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research
- Mohali, India
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11
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Putra AE, Takigawa K, Tanaka H, Ito Y, Oe Y, Ohta T. Transition-Metal-Catalyzed Regioselective Alkylation of Indoles with Alcohols. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300744] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Cano R, Yus M, Ramón DJ. Environmentally friendly and regioselective C3-alkylation of indoles with alcohols through a hydrogen autotransfer strategy. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.04.062] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Lin A, Yang J, Hashim M. N-indolyltriethylborate: a useful reagent for synthesis of C3-quaternary indolenines. Org Lett 2013; 15:1950-3. [PMID: 23566252 DOI: 10.1021/ol4005992] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
N-Indolyltriethylborate was found to be a useful reagent for dearomatizing C3-alkylation of 3-substituted indoles with both activated and nonactivated alkyl halides to give C3-quaternary indolenines, pyrroloindolines, furoindoline, and hexahydropyridoindoline under mild reaction conditions. The utility of these reagents was demonstrated in the syntheses of a pyrroloindoline-4-cholestene hybrid and debromoflustramine B.
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Affiliation(s)
- Aijun Lin
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
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14
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Sharma R, Kumar K, Chouhan M, Grover V, Nair VA. Lithium hydroxide mediated synthesis of 3,4-disubstituted pyrroles. RSC Adv 2013. [DOI: 10.1039/c3ra42569j] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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15
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Kumar V, Pal A, Khatik GL, Bhattacharya S, Nair VA. Additive controlled, stereoselective benzylation of 2-thioxotetrahydropyrimidin-4(1H)-ones via chiral induction from a remote stereocenter. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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16
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1,2,4-Oxadiazoles: a new class of anti-prostate cancer agents. Bioorg Med Chem Lett 2012; 22:1912-6. [PMID: 22326399 DOI: 10.1016/j.bmcl.2012.01.059] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Revised: 01/02/2012] [Accepted: 01/17/2012] [Indexed: 01/02/2023]
Abstract
Sulfide and sulfonyl derivatives of 1,2,4-oxadiazoles were synthesized and screened by MTT assay on the prostate cancer cells, DU-145. Six compounds were identified as potential anti-prostate cancer agents with IC(50) values ranging from 0.5 to 5.1μM. These compounds exhibited good activity on the androgen independent cells PC-3, while the results were moderate on androgen dependent LNCaP cells, suggesting the possibility of a mechanism of action different from that of the bioisosteric bicalutamide. Also a very low cytotoxicity was observed on non-cancerous cells MCF-10A.
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17
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Chouhan M, Sharma R, Nair VA. Cp2ZrCl2-induced Reformatsky and Barbier reactions on isatins: an efficient synthesis of 3-substituted-3-hydroxyindolin-2-ones. Appl Organomet Chem 2011. [DOI: 10.1002/aoc.1789] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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