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Guerrero-Caicedo A, Soto-Martínez DM, Osorio DA, Novoa M, Loaiza AE, Jaramillo-Gómez LM. Synthesis of 1-Azaspiro[4.4]nonane Derivatives Enabled by Domino Radical Bicyclization Involving Formation and Capture of Alkoxyaminyl Radicals. ACS OMEGA 2019; 4:21100-21114. [PMID: 31867503 PMCID: PMC6921261 DOI: 10.1021/acsomega.9b02515] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/03/2019] [Indexed: 06/10/2023]
Abstract
The application of a domino radical bicyclization for the synthesis of compounds containing the 1-azaspiro[4.4]nonane skeleton in 11-67% yields as a mixture of diastereomers is described (trans configuration preference). This process involved formation and capture of alkoxyaminyl radicals. For this purpose, O-benzyl oxime ethers with a brominated or iodinated aromatic ring or a terminal alkynyl group and an alkenyl moiety were employed as starting materials. The bicyclization was initiated by 2,2'-azobisisobutyronitrile or triethylborane and promoted by Bu3SnH. The best results were obtained with O-benzyl oxime ethers containing an alkenyl moiety tethered to electron withdrawing groups or aryl substituents, whereas oxime radical precursor attached to methyl-substituted olefin precluded the capture of alkoxyaminyl radical, giving rise mainly to monocyclized product.
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Affiliation(s)
| | - Diana M. Soto-Martínez
- Department
of Chemistry, Universidad del Valle, Calle 13 # 100-00, Cali 760032, Colombia
| | - David A. Osorio
- Department
of Chemistry, Universidad del Valle, Calle 13 # 100-00, Cali 760032, Colombia
| | - Muskendol Novoa
- Department
of Chemistry, Universidad del Valle, Calle 13 # 100-00, Cali 760032, Colombia
| | - Alix E. Loaiza
- Department
of Chemistry, Pontificia Universidad Javeriana, Cra 7 No 40-62, Edificio Carlos
Ortiz 52, Bogotá D. C. 110231561, Colombia
| | - Luz M. Jaramillo-Gómez
- Department
of Chemistry, Universidad del Valle, Calle 13 # 100-00, Cali 760032, Colombia
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Ho PC, Wang J, Vargas-Baca I. Reagents that Contain Se-H or Te-H Bonds. PHYSICAL SCIENCES REVIEWS 2018. [DOI: 10.1515/psr-2017-0130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Species that contain bonds between hydrogen and selenium or tellurium have a characteristic high reactivity, which can be harnessed in the synthesis of valuable organic compounds. This overview includes the synthesis of dihydrides, alkali metal hydrochalcogenides, chalcogenols, chalcogenocarboxylic and chalcogenocarbamic acids, and their application in reactions of reduction, addition to unsaturated compounds, and nucleophilic substitution.
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Affiliation(s)
- Peter C. Ho
- Department of Chemistry and Chemical Biology , McMaster University , 1280 Main Street West , Hamilton , Ontario, Canada
| | - Jin Wang
- Department of Chemistry and Chemical Biology , McMaster University , 1280 Main Street West , Hamilton , Ontario, Canada
| | - Ignacio Vargas-Baca
- Department of Chemistry and Chemical Biology , McMaster University , 1280 Main Street West , Hamilton , Ontario, Canada
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Chen ZH, Tu YQ, Zhang SY, Zhang FM. Development of the Intramolecular Prins Cyclization/Schmidt Reaction for the Construction of the Azaspiro[4,4]nonane: Application to the Formal Synthesis of (±)-Stemonamine. Org Lett 2011; 13:724-7. [DOI: 10.1021/ol102955e] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhi-Hua Chen
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Shu-Yu Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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Lutteke G, AlHussainy R, Wrigstedt PJ, Hue BTB, de Gelder R, van Maarseveen JH, Hiemstra H. Formation of Bicyclic Pyrroles and Furans Through an Enone Allene Photocycloaddition and Fragmentation Sequence. European J Org Chem 2008. [DOI: 10.1002/ejoc.200701017] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Padwa A, Rashatasakhon P, Ozdemir AD, Willis J. A Study of Vinyl Radical Cyclization Using N-Alkenyl-7-bromo-Substituted Hexahydroindolinones. J Org Chem 2004; 70:519-28. [PMID: 15651796 DOI: 10.1021/jo048314i] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new method for the synthesis of the octahydropyrrolo[3,2,1-ij]quinoline ring system that possesses the characteristic skeleton of the aspidosperma family of alkaloids has been developed. The method utilizes an intramolecular Diels-Alder reaction of an amido-substituted furan across a tethered indole pi-bond. To apply this strategy to the synthesis of the indole alkaloid spegazzinidine, it was necessary to address the problem of assembling the final D-ring of the pentacyclic skeleton. Radical cyclization of a model N-allyl-7-bromo-3a-methylhexahydroindolinone system was found to preferentially lead to the 6-endo-trig cyclization product, with the best yield being obtained under high dilution conditions. The six-membered cyclized product is generated through two reaction pathways: (a) 6-endo-trig ring closure and (b) rearrangement of an intermediate methylene-cyclopentyl radical obtained by 5-exo-trig cyclization. A number of related 7-bromo-substituted hexahydroindolinones containing tethered olefinic groups were prepared and found to undergo efficient cyclization under both radical and palladium-mediated reaction conditions. Vinyl radical cyclization with several N-butenyl-substituted systems afforded a mixture of 6-exo and 7-endo cyclization products. A protocol to introduce an ethyl substituent into the C20-position of the aspidospermidine skeleton was also developed.
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Affiliation(s)
- Albert Padwa
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.
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Majumdar KC, Basu PK, Mukhopadhyay PP. Formation of five- and six-membered heterocyclic rings under radical cyclisation conditions. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.05.001] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Navarro-Vázquez A, García A, Domínguez D. A study of aryl radical cyclization in enaminone esters. J Org Chem 2002; 67:3213-20. [PMID: 12003527 DOI: 10.1021/jo0107857] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aryl radical cyclization in N-phenyl, N-benzyl, and N-phenethyl enaminone esters 1a-f was studied. N-Benzyl and N-phenethyl enaminones afforded 5-exo and 6-exo cyclization products, respectively, but radical cyclization did not occur in N-phenyl enaminones. The rate constants for the 5-exo and 6-exo cyclization processes in secondary enaminones were estimated as being on the order of 10(7) s(-1) at 353 K; since DNMR experiments showed the rate constant for rotation around the enaminone C3-N bond to be on the order of 10(4) s(-1) at this temperature, the initial enaminone configuration is maintained throughout the cyclization process. PM3 calculations suggested that the nonoccurrence of endo and 4-exo cyclizations is due to the corresponding transition structures involving significant distortion of the conjugated enaminone system.
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Affiliation(s)
- Armando Navarro-Vázquez
- Departamento de Química Orgánica y Unidad Asociada al CSIC, Facultad de Química, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Quirante J, Escolano C, Massot M, Bonjoch J. Synthesis of 2-azabicyclo[3.3.1]nonanes by means of (carbamoyl)dichloromethyl radical cyclization. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(96)01051-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Russell Bowman W, Stephenson PT, Terrett NK, Young AR. Radical cyclisations of imines and hydrazones. Tetrahedron 1995. [DOI: 10.1016/0040-4020(95)00412-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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13
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Lee E, Kang TS, Joo BJ, Tae JS, Li KS, Chung CK. Azacycle synthesis via radical cyclization of β-aminoacrylates. Tetrahedron Lett 1995. [DOI: 10.1016/0040-4039(94)02223-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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14
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Åhman J, Somfai P. Preparation and intramolecular radical cyclization of some cyclic N-sulfonylenamines. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/p19940001079] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Brumwell JE, Simpkins NS, Terrett NK. Radical cyclisation of dienes and enynes using TolSO2SePh. Tetrahedron Lett 1993. [DOI: 10.1016/s0040-4039(00)77533-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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