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Jevric M, Klepp J, Puschnig J, Lamb O, Sumby CJ, Greatrex BW. Skeletal rearrangement of 6,8-dioxabicyclo[3.2.1]octan-4-ols promoted by thionyl chloride or Appel conditions. Beilstein J Org Chem 2024; 20:823-829. [PMID: 38655557 PMCID: PMC11035982 DOI: 10.3762/bjoc.20.74] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 03/22/2024] [Indexed: 04/26/2024] Open
Abstract
A skeletal rearrangement of a series of 6,8-dioxabicyclo[3.2.1]octan-4-ols has been developed using SOCl2 in the presence of pyridine. An oxygen migration from C5 to C4 was observed when the C4 alcohols were treated with SOCl2/pyridine, giving a 2-chloro-3,8-dioxabicyclo[3.2.1]octane ring-system via the chlorosulfite intermediate. Analogous allylic alcohols with endocyclic and exocyclic unsaturations underwent chlorination without rearrangement due to formation of allylic cations. The rearrangement was also demonstrated using Appel conditions, which gave similar results via the alkoxytriphenylphosphonium intermediate. Several reactions of the products were investigated to show the utility of the rearrangement.
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Affiliation(s)
- Martyn Jevric
- Faculty of Medicine and Health, University of New England, Armidale, 2351, Australia
| | - Julian Klepp
- Faculty of Medicine and Health, University of New England, Armidale, 2351, Australia
| | - Johannes Puschnig
- Faculty of Medicine and Health, University of New England, Armidale, 2351, Australia
| | - Oscar Lamb
- Faculty of Medicine and Health, University of New England, Armidale, 2351, Australia
| | - Christopher J Sumby
- Department of Chemistry and the Centre for Advanced Nanomaterials, The University of Adelaide, Adelaide, 5005, Australia
| | - Ben W Greatrex
- Faculty of Medicine and Health, University of New England, Armidale, 2351, Australia
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2
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Corona-Díaz A, García-Merinos JP, Ochoa ME, Del Río RE, Santillan R, Rojas-Lima S, Morzycki JW, López Y. TiCl 4 catalyzed cleavage of (25R)-22-oxo-23-spiroketals. Synthesis of sapogenins with furostanol and pyranone E rings on the side chain. Steroids 2019; 152:108488. [PMID: 31499076 DOI: 10.1016/j.steroids.2019.108488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 08/04/2019] [Accepted: 08/27/2019] [Indexed: 02/07/2023]
Abstract
The regioselective opening of the F ring of 22-oxo-23-spiroketals 7a-d using TiCl4 in acetic anhydride yielded the novel furostanols 11a-d along with cholestanic derivatives 8a-d with pyranone E ring. The structures of the new derivatives thus obtained were established using one- (DEPT) and two-dimensional 1H, 13C NMR experiments (COSY, HSQC, HMBC, NOESY). The 22α-hydroxyl orientation in compounds 11a-d was proposed by comparison of the 13C chemical shifts with those of other aglycone members of this family, and confirmed by combined NOESY and X-ray diffraction analysis of compound 11a.
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Affiliation(s)
- Alejandro Corona-Díaz
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ed.B-1, C.U., Morelia, Michoacán 58030, Mexico
| | - J Pablo García-Merinos
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ed.B-1, C.U., Morelia, Michoacán 58030, Mexico
| | - María E Ochoa
- Departamento de Química, CINVESTAV-IPN, Apdo. Postal 14-740, México, D.F., 07000, Mexico
| | - Rosa E Del Río
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ed.B-1, C.U., Morelia, Michoacán 58030, Mexico
| | - Rosa Santillan
- Departamento de Química, CINVESTAV-IPN, Apdo. Postal 14-740, México, D.F., 07000, Mexico
| | - Susana Rojas-Lima
- Área Académica de Química, Universidad Autonoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km 4.5, Ciudad Universitaria, 42184, Mineral de la Reforma, Hidalgo, Mexico
| | - Jacek W Morzycki
- Institute of Chemistry, University of Białystok, K. Ciołkowskiego 1 K, 15-245 Białystok, Poland
| | - Yliana López
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ed.B-1, C.U., Morelia, Michoacán 58030, Mexico.
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3
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Díaz AC, Pablo García Merinos J, López Y, Betzabe González Campos J, del Río RE, Santillan R, Farfán N, Morzycki JW. Regio- and stereoselective cleavage of steroidal 22-oxo-23-spiroketals catalyzed by BF3·Et2O. Steroids 2015; 100:36-43. [PMID: 25937081 DOI: 10.1016/j.steroids.2015.04.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 04/05/2015] [Accepted: 04/14/2015] [Indexed: 11/12/2022]
Abstract
The regioselective opening of the F ring of 22-oxo-23-spiroketals using BF3·OEt2 in acetic anhydride yielded novel cholestanic frameworks with pyranone E ring 20-23. The structures of the new derivatives of botogenin, diosgenin, hecogenin and tigogenin thus obtained were established using one and two dimensional (1)H, (13)C experiments (DEPT, COSY, HETCOR, HMBC). The X-ray diffraction analysis unequivocally confirmed the R configuration at C-23 in the starting 22-oxo-23-spiroketal 18 and the Z configuration of the C23-C24 double bond in the reaction product 20.
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Affiliation(s)
- Alejandro Corona Díaz
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ed. B-1, C.U., Morelia, Michoacán 58030, Mexico
| | - J Pablo García Merinos
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ed. B-1, C.U., Morelia, Michoacán 58030, Mexico
| | - Yliana López
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ed. B-1, C.U., Morelia, Michoacán 58030, Mexico.
| | - J Betzabe González Campos
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ed. B-1, C.U., Morelia, Michoacán 58030, Mexico
| | - Rosa E del Río
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ed. B-1, C.U., Morelia, Michoacán 58030, Mexico
| | - Rosa Santillan
- Departamento de Química, CINVESTAV-IPN, Apdo. Postal 14-740, México, D.F. 07000, Mexico
| | - Norberto Farfán
- Facultad de Química, Departamento de Química Orgánica, Universidad Nacional Autónoma de México, México, D.F. 04510, Mexico
| | - Jacek W Morzycki
- Institute of Chemistry, University of Białystok, Piłsudskiego 11/4, 15-443 Białystok, Poland
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4
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Macías-Alonso M, Flores-Álamo M, Iglesias-Arteaga MA. Mechanistic insights on the reactivity of furospirostanes with the 16β,22:22,25-diepoxy-23-acetoxymethyl-24-methyl side chain. Steroids 2013; 78:787-97. [PMID: 23707575 DOI: 10.1016/j.steroids.2013.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 04/16/2013] [Accepted: 05/09/2013] [Indexed: 11/27/2022]
Abstract
F-ring opening in spirostanes with the 16β,22:22,25-diepoxy-23-acetoxymethyl-24-methyl side chain produces a Δ(22)-intermediate with an allylic acetoxy group. For this reason the reactivity profile of these compounds deviates from that observed in other naturally occurring or synthetic spirostanes and furospirostanes.
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Affiliation(s)
- Mariana Macías-Alonso
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, DF, Mexico
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5
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Ramos-Enríquez MA, Romero-Ávila M, Flores-Álamo M, Iglesias-Arteaga MA. An alternative reduction course of the spiroketal side chain of steroid sapogenins induced by the presence of a 23E-benzylidene moiety. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.06.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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7
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Jastrzębska I, Górecki M, Frelek J, Santillan R, Siergiejczyk L, Morzycki JW. Photoinduced Isomerization of 23-Oxosapogenins: Conformational Analysis and Spectroscopic Characterization of 22-Isosapogenins. J Org Chem 2012. [PMID: 23190388 DOI: 10.1021/jo3022549] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Izabella Jastrzębska
- Institute of Chemistry, University of Białystok, Piłsudskiego 11/4,
15-443 Białystok, Poland
| | - Marcin Górecki
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224
Warsaw, Poland
| | - Jadwiga Frelek
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224
Warsaw, Poland
| | - Rosa Santillan
- Departamento
de Química, CINVESTAV-IPN, Apdo.
Postal 14-740, 07000 México,
D.F., Mexico
| | - Leszek Siergiejczyk
- Institute of Chemistry, University of Białystok, Piłsudskiego 11/4,
15-443 Białystok, Poland
| | - Jacek W. Morzycki
- Institute of Chemistry, University of Białystok, Piłsudskiego 11/4,
15-443 Białystok, Poland
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8
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Macías-Alonso M, Flores-Álamo M, Iglesias-Arteaga MA. On the reactivity of 23-methoxycarbonyl furospirostanes. Steroids 2011; 76:1021-31. [PMID: 21515298 DOI: 10.1016/j.steroids.2011.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 03/31/2011] [Accepted: 04/01/2011] [Indexed: 11/26/2022]
Abstract
Brønsted and Lewis acid-catalysed reactions of the 23-methoxycarbonyl furospirostanic side chain are described. While bromination, deuteration and BF(3)·Et(2)O/AcOH treatment involve regioselective F-ring opening with exclusive participation of Δ(22)-furostenic intermediates, BF(3)·Et(2)O/Ac(2)O treatment leads to irreversible E- or F-ring cleavage.
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Affiliation(s)
- Mariana Macías-Alonso
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Mexico, DF, Mexico
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9
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Macias-Alonso M, Morzycki JW, Iglesias-Arteaga MA. Studies on the BF3·Et2O catalyzed Baeyer-Villiger reaction of spiroketalic steroidal ketones. Steroids 2011; 76:317-23. [PMID: 21167855 DOI: 10.1016/j.steroids.2010.12.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 11/27/2010] [Accepted: 12/08/2010] [Indexed: 10/18/2022]
Abstract
During reactions of 23-oxosapogenins and the corresponding isomeric 22-oxo-23-spiroketals with MCPBA in the presence of BF(3)·Et(2)O, equilibration occurs between the ketones. The Baeyer-Villiger type oxidation is followed by fragmentation to the dinorcholanic lactones and 3-methylbutyrolactone. The mechanistic aspects of these reactions in the 25R and 25S series are discussed.
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Affiliation(s)
- Mariana Macias-Alonso
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, DF, Mexico
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10
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Macías-Alonso M, Flores-Alamo M, Iglesias-Arteaga MA. Beckmann reactions of steroidal spirocyclic oximes derived from the 16beta,23:23,26-diepoxy-22-oxo moiety. Steroids 2009; 74:112-20. [PMID: 18996137 DOI: 10.1016/j.steroids.2008.09.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2008] [Revised: 09/20/2008] [Accepted: 09/26/2008] [Indexed: 10/21/2022]
Abstract
The Beckmann rearrangement of the syn and anti isomers of the spirocyclic oxime derived from a 16beta,23:23,26-diepoxy-5beta-cholestan-22-one was studied. Whereas the anti isomer always follows the Beckmann fragmentation course, the syn isomer, depending on the reaction conditions, follows the normal Beckmann rearrangement course and/or the isomerization to the anti isomer followed by the fragmentation course.
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Affiliation(s)
- Mariana Macías-Alonso
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México D.F., Mexico
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11
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Vázquez-Ramírez I, Macías-Alonso M, Arcos-Ramos RO, Ruíz-Pérez KM, Solano-Ramírez DO, Iglesias Arteaga MA. 1H and 13C NMR characteristics of synthetic derivatives of steroid sapogenins. Part III. 16Beta,23:23,26-diepoxy side chains. Steroids 2008; 73:642-51. [PMID: 18353410 DOI: 10.1016/j.steroids.2008.01.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2007] [Revised: 01/22/2008] [Accepted: 01/28/2008] [Indexed: 11/17/2022]
Abstract
The full assignments of the (1)H and (13)C NMR signals of steroids bearing the 16beta,23:23,26-diepoxy side chain are provided. Differentiation of the diasterotopic H-26 pair was achieved with the aid of NOESY experiments. The main substituent and steric effects associated with this moiety and their influence on the chemical shifts of the neighboring atoms are discussed.
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Affiliation(s)
- Ignacio Vázquez-Ramírez
- Departamento de Química Orgánica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, D.F., Mexico
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12
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One-step axial acetoxylation at C-23. A new method for the functionalization of the side chain of steroid sapogenins. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.09.078] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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López Y, Santillan R, Farfán N. New bisfuran derivative from sarsasapogenin. An X-ray and NMR analysis. Steroids 2006; 71:12-7. [PMID: 16199071 DOI: 10.1016/j.steroids.2005.07.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2005] [Revised: 06/24/2005] [Accepted: 07/27/2005] [Indexed: 10/25/2022]
Abstract
The new bisfuran derivative, (22S,23S)-22,23-dihydroxy-23,26-epoxyfurostane, was obtained from the known oxidation of sarsasapogenin acetate with NaNO2/BF3 in 5% aqueous acetic acid. The structure of was established using one and two-dimensional 1H, 13C experiments (DEPT, COSY, HETCOR and HMBC) and the configurations at the newly formed stereogenic centers were established as 22S,23S by an X-ray diffraction analysis. Addition of TiCl4 to bisfuran 5 confirmed that this compound is an intermediate in the rearrangement to 22-oxo-23-spiroketals since it was transformed quantitatively into the latter product. The 23-nitroimino intermediate 2 was isolated from the same reaction and its structure established also by an X-ray diffraction analysis; this compound was further transformed into the 23-nitramine 7 which could find application in functionalization of position 24.
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Affiliation(s)
- Yliana López
- Departamento de Química, CINVESTAV-IPN, Apdo. Postal 14-740, 07000 México, D.F., Mexico
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14
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Iglesias-Arteaga MA, Velázquez-Huerta GA. Favorskii rearrangement of 23-oxo-3-epi-smilagenin acetate induced by iodosobenzene. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.08.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Diisobutylaluminium hydride (DIBAL-H) as a molecular scalpel: a new mechanistic proposal for a spiroketal rearrangement. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.09.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Cyrański MK, Frelek J, Jastrzebska I, Morzycki JW. Rearrangement of 23-oxospirostanes to the 22-oxo-23-spiroketal isomers promoted by Lewis acids--X-ray crystal structure of (23R,25S)-3beta-acetoxy-16beta,23:23,26-diepoxy-5beta-cholestan-22-one. Steroids 2004; 69:395-400. [PMID: 15219789 DOI: 10.1016/j.steroids.2004.03.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2003] [Revised: 03/11/2004] [Accepted: 03/18/2004] [Indexed: 10/26/2022]
Abstract
Both 25R and 25S 23-oxospirostanes undergo rearrangement to the 22-oxo-23-spiroketal isomers promoted by Lewis acids. An X-ray crystal structure analysis of the rearranged product of 23-oxosarsasapogenin acetate confirmed the R configuration at the new spiro carbon atom.
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Affiliation(s)
- Michał K Cyrański
- Department of Chemistry, University of Warsaw, ul. Pasteura 1, 02-093 Warsaw, Poland
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17
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Betancor C, Dorta RL, Freire R, Prangé T, Suárez E. Rearrangement of spiroacetals of the 1,6-Dioxaspiro[4.5]decan-10-yl methanesulfonate type. Synthesis of cis-fused 1,6-dioxadecalins. J Org Chem 2000; 65:8822-5. [PMID: 11112612 DOI: 10.1021/jo005593a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C Betancor
- Instituto de Productos Naturales y Agrobiología del C.S.I.C., Carretera de La Esperanza 3, 38206-La Laguna, Tenerife, Spain
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18
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LaCour TG, Tong Z, Fuchs PL. Consequences of acid catalysis in concurrent ring opening and halogenation of spiroketals. Org Lett 1999; 1:1815-8. [PMID: 10836039 DOI: 10.1021/ol991078r] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[formula: see text] Lewis and/or Bronsted acid additives permit ring opening and halogenation of spiroketals at substantially reduced temperatures to produce omega-iodo enol ethers in improved yield and purity, which can undergo further reaction in the presence of distal electrophilic centers to give new steroid skeletons.
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Affiliation(s)
- T G LaCour
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA.
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