1
|
An Investigation of the Enolization and Isomeric Products Distribution in the Water Promoted Aldol Reaction of Tropinone and Granatanone. J CHEM-NY 2016. [DOI: 10.1155/2016/4674901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The exo,anti/exo,syn-diastereoselectivity of water promoted direct aldol reactions of tropinone and granatanone (pseudopelletierine) is strongly dependent on the amount of water added and aromatic aldehyde used. DFT methods were applied to calculate the free energies of tropinone and granatanone enols, transition states, and isomeric aldol products. A theoretical model was verified by comparison of results from several DFT methods and functionals with experiments. The 6-31g(d)/CPCM method proved most suited to the problem, although all methods tested predicted similar trends. Explicit inclusion of a water molecule bonded to the amino ketones resulted in increased stability of the enol forms. The dependence of the anti/syn-diastereoselectivity on the amount of water used may be rationalized on the basis of change in the polarity of the reaction medium. The predicted stabilities of competing products agreed with experimental results supporting the notion of thermodynamic control. The isomeric products distributions for the aldol reaction of several aromatic aldehydes in solventless (neat) conditions were accurately calculated from free energies of the aldol addition step in the gas phase using B3LYP/6-31g(d) method and in aqueous conditions using the CPCM-B3LYP/6-31g(d) model. Our methodology can be useful for predicting the outcome of this type of aldol reactions.
Collapse
|
2
|
China H, Okada Y, Dohi T. The Multiple Reactions in the Monochlorodimedone Assay: Discovery of Unique Dehalolactonizations under Mild Conditions. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500210] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Hideyasu China
- Department of Applied Chemistry; College of Life Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Yutaka Okada
- Department of Applied Chemistry; College of Life Sciences; Ritsumeikan University; 1-1-1 Nojihigashi Kusatsu Shiga 525-8577 Japan
| | - Toshifumi Dohi
- Department of Pharmaceutical Sciences; College of Pharmaceutical Sciences; Ritsumeikan University; Japan
| |
Collapse
|
3
|
Sidorowicz K, Ratkiewicz A, Nodzewska A, Lazny R. Determination of the N-invertomer stereochemistry in N-substituted nortropanones and norgranatanones using computational and NMR methods. CR CHIM 2015. [DOI: 10.1016/j.crci.2014.10.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
4
|
Dobi Z, Holczbauer T, Soós T. Strain-Driven Direct Cross-Aldol and -Ketol Reactions of Four-Membered Heterocyclic Ketones. Org Lett 2015; 17:2634-7. [DOI: 10.1021/acs.orglett.5b01002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Zoltán Dobi
- Institute of Organic Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1519 Budapest, Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1519 Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1519 Budapest, Hungary
| |
Collapse
|
5
|
Nodzewska A, Bokina A, Romanowska K, Lazny R. Environmentally benign diastereoselective synthesis of granatane and tropane aldol derivatives. RSC Adv 2014. [DOI: 10.1039/c4ra02834a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
6
|
Brzezinski K, Lazny R, Nodzewska A, Sidorowicz K. Relative configuration, absolute configuration and absolute structure of three isomeric 8-benzyl-2-[(4-bromophenyl)(hydroxy)methyl]-8-azabicyclo[3.2.1]octan-3-ones. Acta Crystallogr C 2013; 69:303-6. [DOI: 10.1107/s0108270113002503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Accepted: 01/24/2013] [Indexed: 11/10/2022] Open
Abstract
The title compounds, C21H22BrNO2, are isomeric 8-benzyl-2-[(4-bromophenyl)(hydroxy)methyl]-8-azabicyclo[3.2.1]octan-3-ones. Compound (I), the (±)-exo,syn-(1RS,2SR,5SR,9SR) isomer, crystallizes in the hexagonal space groupR\overline{3}, while compounds (II) [the (+)-exo,anti-(1R,2S,5S,9R) isomer] and (III) [the (±)-exo,anti-(1RS,2SR,5SR,9RS) isomer] crystallize in the orthorhombic space groupsP212121andPna21, respectively. The absolute configuration was determined for enantiomerically pure (II). For the noncentrosymmetric crystal of (III), its absolute structure was established. In the crystal structures of (I) and (II), an intramolecular hydrogen bond is formed between the hydroxy group and the heterocyclic N atom. In the crystal structure of racemic (III), hydrogen-bonded chains of molecules are formedviaintermolecular O—H...O interactions. Additionally, face-to-edge π–π interactions are present in the crystal structures of (I) and (II). In all three structures, the piperidinone rings adopt chair conformations and theN-benzyl substituents occupy the equatorial positions.
Collapse
|
7
|
Lazny R, Nodzewska A, Sidorowicz K, Kalicki P. Determination of the relative configuration of tropinone and granatanone aldols by using TBDMS ethers. Beilstein J Org Chem 2012; 8:1877-83. [PMID: 23209525 PMCID: PMC3511025 DOI: 10.3762/bjoc.8.216] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 10/02/2012] [Indexed: 11/23/2022] Open
Abstract
The relative configurations of tert-butyldimethylsilyl (TBDMS) ethers of all four diastereomers of the aldols of tropinone (8-methyl-8-azabicyclo[3.2.1]octan-3-one), as well as of granatanone (9-methyl-9-azabicyclo[3.3.1]nonan-3-one), were determined from NMR data, and from the observed interconversion of the diastereomers (exo,anti to endo,syn and exo,syn to endo,anti). The exo forms invert to endo isomers in the presence of silica gel. The relative configuration of a new isomer of tropinone aldol accessible synthetically through the direct solventless reaction of tropinone and benzaldehyde in the presence of water was determined as exo,syn by comparison of NMR data of the aldol isomers, in particular vicinal coupling constants and shifts corresponding to the side-chain CH group, with data of related TBDMS derivatives and confirmed by single-crystal X-ray diffraction.
Collapse
Affiliation(s)
- Ryszard Lazny
- Institute of Chemistry, University of Bialystok, ul. Hurtowa 1, 15-339 Bialystok, Poland
| | | | | | | |
Collapse
|
8
|
Lazny R, Ratkiewicz A, Nodzewska A, Wysocka J. A DFT study of the origins of the stereoselectivity in the aldol reaction of bicyclic amino ketones in the presence of water. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.08.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
9
|
Lazny R, Sienkiewicz M, Olenski T, Urbanczyk-Lipkowska Z, Kalicki P. Approaches to the enantioselective synthesis of ferrugine and its analogues. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.07.061] [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]
|
10
|
Lazny R, Ratkiewicz A, Nodzewska A, Wynimko A, Siergiejczyk L. Determination of the N-methyl stereochemistry in tropane and granatane derivatives in solution: a computational and NMR spectroscopic study. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.05.076] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
11
|
Lazny R, Wolosewicz K, Dauter Z, Brzezinski K. (1RS,2SR,5SR)-9-Benzyl-2-[(1RS)-1-hy-droxy-benz-yl]-9-aza-bicyclo-[3.3.1]nonan-3-one from synchrotron data. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1367. [PMID: 22590261 PMCID: PMC3344499 DOI: 10.1107/s1600536812014754] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 04/04/2012] [Indexed: 11/10/2022]
Abstract
In the crystal structure of the racemic title compound, C(22)H(25)NO(2), solved and refined against sychrotron diffraction data, the hy-droxy group and the carbonyl O atom participate in the formation of O-H⋯O hydrogen bonds between pairs of enanti-omers related by a crystallographic centre of symmetry.
Collapse
Affiliation(s)
- Ryszard Lazny
- Institute of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Bialystok, Poland
| | - Karol Wolosewicz
- Institute of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Bialystok, Poland
| | - Zbigniew Dauter
- Synchrotron Radiation Research Section, MCL, National Cancer Institute, Argonne National Laboratory, Biosciences Division, Bldg 202, Argonne, IL 60439, USA
| | - Krzysztof Brzezinski
- Institute of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Bialystok, Poland
- Synchrotron Radiation Research Section, MCL, National Cancer Institute, Argonne National Laboratory, Biosciences Division, Bldg 202, Argonne, IL 60439, USA
| |
Collapse
|
12
|
Brzezinski K, Lazny R, Sienkiewicz M, Wojtulewski S, Dauter Z. (2R)-8-Benzyl-2-[(S)-hy-droxy(phen-yl)meth-yl]-8-aza-bicyclo-[3.2.1]octan-3-one. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o149-50. [PMID: 22259435 PMCID: PMC3254493 DOI: 10.1107/s1600536811053190] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Accepted: 12/09/2011] [Indexed: 11/10/2022]
Abstract
The crystal of the title compound, C(21)H(23)NO(2), was chosen from a conglomerate formed by a racemic mixture. An intra-molecular hydrogen bond is formed between hy-droxy group and heterocyclic N atom of the aza-bicyclo-[3.2.1]octan-3-one system. The crystal structure is stabilized by C-H⋯O inter-actions between aliphatic C-H groups and the carbonyl O atom. For the title chiral crystal, the highly redundant and accurate diffraction data set collected with low energy copper radiation gave a Flack parameter of 0.12 (18) for anomalous scattering effects originating from O atoms.
Collapse
Affiliation(s)
- Krzysztof Brzezinski
- Synchrotron Radiation Research Section, MCL, National Cancer Institute, Argonne National Laboratory, Biosciences Division, Bldg. 202, Argonne, IL 60439, USA
| | - Ryszard Lazny
- Institute of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Bialystok, Poland
| | - Michal Sienkiewicz
- Institute of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Bialystok, Poland
| | - Sławomir Wojtulewski
- Institute of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Bialystok, Poland
| | - Zbigniew Dauter
- Synchrotron Radiation Research Section, MCL, National Cancer Institute, Argonne National Laboratory, Biosciences Division, Bldg. 202, Argonne, IL 60439, USA
| |
Collapse
|