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Santalla H, Nieto Faza O, Gómez G, Fall Y, López CS. On the mechanism of the dyotropic expansion of hydrindanes into decalins. Org Biomol Chem 2022; 20:1073-1079. [PMID: 35029264 DOI: 10.1039/d1ob02150h] [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 combined computational/experimental approach has revealed key mechanistic aspects in a recently reported dyotropic expansion of hydrindanes into decalins. While computer simulations had already anticipated the need for acid catalysis for making this reaction feasible under the mild conditions used in the laboratory, this work places the dyotropic step not into the reaction flask but at a later step, during the work up instead. With this information in hand the reaction has been optimized by exploring the performance of different activating agents and shown to be versatile, particularly in steroid related chemistry due to the two scaffolds that this reaction connects. Finally, the scope of the reaction has been significantly broadened by showing that this protocol can also operate in the absence of the fused six-member ring.
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Affiliation(s)
- Hugo Santalla
- Departamento de Química Orgánica and Instituto de Investigación Sanitaria Galicia Sur (IISGS), Campus Lagoas-Marcosende, 36310 Vigo, Spain. .,Departamento de Química Orgánica, Campus Lagoas-Marcosende, 36310 Vigo, Spain
| | - Olalla Nieto Faza
- Departamento de Química Orgánica and Instituto de Investigación Sanitaria Galicia Sur (IISGS), Campus Lagoas-Marcosende, 36310 Vigo, Spain. .,Departamento de Química Orgánica, Campus Lagoas-Marcosende, 36310 Vigo, Spain
| | - Generosa Gómez
- Departamento de Química Orgánica and Instituto de Investigación Sanitaria Galicia Sur (IISGS), Campus Lagoas-Marcosende, 36310 Vigo, Spain. .,Departamento de Química Orgánica, Campus Lagoas-Marcosende, 36310 Vigo, Spain
| | - Yagamare Fall
- Departamento de Química Orgánica and Instituto de Investigación Sanitaria Galicia Sur (IISGS), Campus Lagoas-Marcosende, 36310 Vigo, Spain. .,Departamento de Química Orgánica, Campus Lagoas-Marcosende, 36310 Vigo, Spain
| | - Carlos Silva López
- Departamento de Química Orgánica and Instituto de Investigación Sanitaria Galicia Sur (IISGS), Campus Lagoas-Marcosende, 36310 Vigo, Spain. .,Departamento de Química Orgánica, Campus Lagoas-Marcosende, 36310 Vigo, Spain
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2
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Synthesis of a New Type of Trans-Decalin Vitamin D Analogue through a Dyotropic Ring Expansion. J CHEM-NY 2021. [DOI: 10.1155/2021/6429427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A new vitamin D analogue with a trans-fused decalin as the CD-ring system and containing a sulphur atom in the side chain has been synthesized in our research group. The obtention of this analogue is based on a recently discovered transformation of hydrindane cores into decalins through a dyotropic ring expansion in very mild conditions.
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3
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Santalla H, Gándara Z, Gómez-Bouzó U, Gómez G, Fall Y. Easy Access to Polyfunctionalized Chiral Decalins. ACS OMEGA 2020; 5:26049-26055. [PMID: 33073131 PMCID: PMC7557988 DOI: 10.1021/acsomega.0c03504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 09/21/2020] [Indexed: 06/11/2023]
Abstract
An unexpected ring expansion that converts hydrindanes into decalins via an unprecedented dyotropic reaction involving a mesylate group has been observed, and this paved the way for easy access to polyfunctionalized chiral decalins. These polyfunctionalized chiral decalins can be very useful building blocks for the synthesis of the thia analogues of many natural compounds. They can also be used in asymmetric catalysis and also in the synthesis of the new analogues of vitamin D with a modified D ring and side chain. The use of chiral sulfoxide ligands for asymmetric catalysis or asymmetric sulfur ylide-mediated epoxidation of carbonyl compounds is a very important topic in the field of organic chemistry, hence our results could be useful to the scientific community.
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Affiliation(s)
- Hugo Santalla
- Departamento
de Química Orgánica, Facultad de Química
and Instituto de Investigación Sanitaria Galicia Sur (IISGS), University of Vigo, Campus Marcosende, 36310 Vigo, Spain
- CITACA—Cluster
de Investigación é Transferencia Agroalimentaria do
Campus Auga, Universidad de Vigo, 32004 Ourense, Spain
| | - Zoila Gándara
- Departamento
de Química Orgánica, Facultad de Química
and Instituto de Investigación Sanitaria Galicia Sur (IISGS), University of Vigo, Campus Marcosende, 36310 Vigo, Spain
- CITACA—Cluster
de Investigación é Transferencia Agroalimentaria do
Campus Auga, Universidad de Vigo, 32004 Ourense, Spain
| | - Uxía Gómez-Bouzó
- Departamento
de Química Orgánica, Facultad de Química
and Instituto de Investigación Sanitaria Galicia Sur (IISGS), University of Vigo, Campus Marcosende, 36310 Vigo, Spain
- CITACA—Cluster
de Investigación é Transferencia Agroalimentaria do
Campus Auga, Universidad de Vigo, 32004 Ourense, Spain
| | - Generosa Gómez
- Departamento
de Química Orgánica, Facultad de Química
and Instituto de Investigación Sanitaria Galicia Sur (IISGS), University of Vigo, Campus Marcosende, 36310 Vigo, Spain
- CITACA—Cluster
de Investigación é Transferencia Agroalimentaria do
Campus Auga, Universidad de Vigo, 32004 Ourense, Spain
| | - Yagamare Fall
- Departamento
de Química Orgánica, Facultad de Química
and Instituto de Investigación Sanitaria Galicia Sur (IISGS), University of Vigo, Campus Marcosende, 36310 Vigo, Spain
- CITACA—Cluster
de Investigación é Transferencia Agroalimentaria do
Campus Auga, Universidad de Vigo, 32004 Ourense, Spain
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4
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Goh SS, Champagne PA, Guduguntla S, Kikuchi T, Fujita M, Houk KN, Feringa BL. Stereospecific Ring Contraction of Bromocycloheptenes through Dyotropic Rearrangements via Nonclassical Carbocation-Anion Pairs. J Am Chem Soc 2018; 140:4986-4990. [PMID: 29596748 PMCID: PMC5909176 DOI: 10.1021/jacs.8b00821] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Experimental
and theoretical evidence is reported for a rare type
I dyotropic rearrangement involving a [1,2]-alkene shift, leading
to the regio- and stereospecific ring contraction of bromocycloheptenes.
This reaction occurs under mild conditions, with or without a Lewis
acid catalyst. DFT calculations show that the reaction proceeds through
a nonclassical carbocation–anion pair, which is crucial for
the low activation barrier and enantiospecificity. The chiral cyclopropylcarbinyl cation may be a transition
state or an intermediate, depending on the reaction conditions.
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Affiliation(s)
- Shermin S Goh
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands
| | - Pier Alexandre Champagne
- Department of Chemistry and Biochemistry , University of California-Los Angeles , 607 Charles E. Young Drive East , Box 951569, Los Angeles , California 90095-1569 , United States
| | - Sureshbabu Guduguntla
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands
| | - Takashi Kikuchi
- Department of Applied Chemistry , University of Tokyo , 7-3-1 Hongo, Bukyo-ku , Tokyo 113-8656 , Japan.,Rigaku Corporation , 3-9-12 Matsubara-cho, Akishima-shi , Tokyo 196-8628 , Japan
| | - Makoto Fujita
- Department of Applied Chemistry , University of Tokyo , 7-3-1 Hongo, Bukyo-ku , Tokyo 113-8656 , Japan
| | - K N Houk
- Department of Chemistry and Biochemistry , University of California-Los Angeles , 607 Charles E. Young Drive East , Box 951569, Los Angeles , California 90095-1569 , United States
| | - Ben L Feringa
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands
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Liu Y, Cerveri A, De Nisi A, Monari M, Nieto Faza O, Lopez CS, Bandini M. Nickel catalyzed regio- and stereoselective arylation and methylation of allenamides via coupling reactions. An experimental and computational study. Org Chem Front 2018. [DOI: 10.1039/c8qo00729b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A novel Ni-catalyzed regio- and stereoselective condensation of boronic acids/Me2Zn to allenamides is documented and its potential explored.
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Affiliation(s)
- Yang Liu
- Dipartimento di Chimica “G. Ciamician”
- Alma Mater Studiorum – Università di Bologna
- 40126 Bologna
- Italy
| | - Alessandro Cerveri
- Dipartimento di Chimica “G. Ciamician”
- Alma Mater Studiorum – Università di Bologna
- 40126 Bologna
- Italy
| | - Assunta De Nisi
- Dipartimento di Chimica “G. Ciamician”
- Alma Mater Studiorum – Università di Bologna
- 40126 Bologna
- Italy
| | - Magda Monari
- Dipartimento di Chimica “G. Ciamician”
- Alma Mater Studiorum – Università di Bologna
- 40126 Bologna
- Italy
| | | | | | - Marco Bandini
- Dipartimento di Chimica “G. Ciamician”
- Alma Mater Studiorum – Università di Bologna
- 40126 Bologna
- Italy
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Kou KGM, Kulyk S, Marth CJ, Lee JC, Doering NA, Li BX, Gallego GM, Lebold TP, Sarpong R. A Unifying Synthesis Approach to the C 18-, C 19-, and C 20-Diterpenoid Alkaloids. J Am Chem Soc 2017; 139:13882-13896. [PMID: 28858498 PMCID: PMC6372304 DOI: 10.1021/jacs.7b07706] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The secondary metabolites that comprise the diterpenoid alkaloids are categorized into C18, C19, and C20 families depending on the number of contiguous carbon atoms that constitute their central framework. Herein, we detail our efforts to prepare these molecules by chemical synthesis, including a photochemical approach, and ultimately a bioinspired strategy that has resulted in the development of a unifying synthesis of one C18 (weisaconitine D), one C19 (liljestrandinine), and three C20 (cochlearenine, paniculamine, and N-ethyl-1α-hydroxy-17-veratroyldictyzine) natural products from a common intermediate.
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Affiliation(s)
- Kevin G. M. Kou
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | | | | | | | - Nicolle A. Doering
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Beryl X. Li
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | | | | | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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