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Diastereoselective aza-Michael addition for synthesis of carbohydrate-derived spiropiperazinones. MONATSHEFTE FUR CHEMIE 2019. [DOI: 10.1007/s00706-018-2304-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ivanovs I, Bērziņa S, Lugiņina J, Belyakov S, Rjabovs V. Stereoselective Michael addition of O-nucleophiles to carbohydrate-based nitro-olefin. HETEROCYCL COMMUN 2016. [DOI: 10.1515/hc-2016-0003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
AbstractMichael addition reactions of O-nucleophiles to C(3) exocyclic nitromethylene derivative of diacetone glucose are reported. The reactions with primary alcohols proceed at ambient temperature in the presence of different bases with good yields and give products with excellent diastereoselectivity. The addition of the nucleophile occurs from the β-face of the carbohydrate as shown by single crystal X-ray analysis. The reactions with secondary alcohols give low yields of products while phenolic compounds do not react. Under certain conditions, isomerization of starting material is observed.
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Affiliation(s)
- Ilgvalds Ivanovs
- 1Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
| | - Santa Bērziņa
- 1Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
| | - Jevgeņija Lugiņina
- 1Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
| | - Sergey Belyakov
- 2Latvian Institute of Organic Synthesis, Aizkraukles str. 21, Riga, LV-1006, Latvia
| | - Vitālijs Rjabovs
- 1Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
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Lugiņina J, Rjabovs V, Stepanovs D. Crystal structure of 3-de-oxy-3-nitro-methyl-1,2;5,6-di-O-iso-propyl-idene-α-d-allo-furan-ose. Acta Crystallogr E Crystallogr Commun 2016; 72:314-7. [PMID: 27006795 PMCID: PMC4778814 DOI: 10.1107/s2056989016001845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 01/31/2016] [Indexed: 12/03/2022]
Abstract
The title compound, C13H21NO7 {systematic name: (3aR,5S,6R,6aR)-5-[(R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-dimethyl-6-(nitro-meth-yl)tetra-hydro-furo[2,3-d][1,3]dioxole}, consists of a substituted 2,2-di-methyl-tetra-hydro-furo[2,3-d][1,3]dioxolane skeleton. The furan-ose ring A adopts a (o)T 4 conformation. The fused dioxolane ring B and the substituent dioxolane ring C also have twisted conformations. There are no strong hydrogen bonds in the crystal structure: only weak C-H⋯O contacts are present, which link the mol-ecules to form a three-dimensional structure.
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Affiliation(s)
- Jevgeņija Lugiņina
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and, Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
| | - Vitālijs Rjabovs
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and, Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
| | - Dmitrijs Stepanovs
- Latvian Institute of Organic Synthesis, Str. Aizkraukles 21, Riga, LV 1006, Latvia
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Rjabovs V, Stepanovs D, Turks M. Crystal structure of 3-C-(N-benzyl-oxy-carbon-yl)amino-methyl-3-de-oxy-1,2:5,6-di-O-iso-propyl-idene-α-d-allo-furan-ose. Acta Crystallogr E Crystallogr Commun 2015; 71:1212-1215. [PMID: 26594409 PMCID: PMC4647424 DOI: 10.1107/s2056989015017582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 09/19/2015] [Indexed: 06/05/2023]
Abstract
The title compound, C21H29NO7 (1) [systematic name: benzyl ({(3aR,5S,6R,6aR)-5-[(R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-di-methyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl}meth-yl)carbamate], consists of a substituted 2,2-di-methyl-tetra-hydro-furo[2,3-d][1,3]dioxolane skeleton. The furan-ose ring adopts an envelope conformation close to C 3-exo, where the C atom substituted by the benzyl carbamate group is the flap. The fused dioxolane ring also adopts an envelope conformation, as does the terminal dioxolane ring, with in each case an O atom as the flap. In the crystal, mol-ecules are linked by N-H⋯O and C-H⋯O hydrogen bonds, forming chains propagating along the b-axis direction.
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Affiliation(s)
- Vitalijs Rjabovs
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
| | - Dmitrijs Stepanovs
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
- Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga, LV-1006, Latvia
| | - Maris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena 3/7, Riga, LV-1048, Latvia
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Novel 3-C-aminomethyl-hexofuranose-derived thioureas and their testing in asymmetric catalysis. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.07.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Rjabovs V, Ostrovskis P, Posevins D, Kiseļovs G, Kumpiņš V, Mishnev A, Turks M. Synthesis of Building Blocks for Carbopeptoids and Their Triazole Isoster Assembly. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500695] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Blade H, Bradley D, Diorazio L, Evans T, Hayter BR, Howell GP. Modular Synthesis of Constrained Ethyl (cEt) Purine and Pyrimidine Nucleosides. J Org Chem 2015; 80:5337-43. [DOI: 10.1021/acs.joc.5b00607] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Helen Blade
- Pharmaceutical Development, AstraZeneca, Charter
Way, Macclesfield SK10
2NA, United Kingdom
| | - Derek Bradley
- Pharmaceutical Development, AstraZeneca, Charter
Way, Macclesfield SK10
2NA, United Kingdom
| | - Louis Diorazio
- Pharmaceutical Development, AstraZeneca, Charter
Way, Macclesfield SK10
2NA, United Kingdom
| | - Timothy Evans
- Pharmaceutical Development, AstraZeneca, Charter
Way, Macclesfield SK10
2NA, United Kingdom
| | - Barry R. Hayter
- Pharmaceutical Development, AstraZeneca, Charter
Way, Macclesfield SK10
2NA, United Kingdom
| | - Gareth P. Howell
- Pharmaceutical Development, AstraZeneca, Charter
Way, Macclesfield SK10
2NA, United Kingdom
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Fukuyama K, Ohrui H, Kuwahara S. Synthesis of EFdA via a Diastereoselective Aldol Reaction of a Protected 3-Keto Furanose. Org Lett 2015; 17:828-31. [DOI: 10.1021/ol5036535] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Kei Fukuyama
- Laboratory
of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan
| | - Hiroshi Ohrui
- Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Shigefumi Kuwahara
- Laboratory
of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan
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Turks M, Vēze K, Kiseļovs G, Mackeviča J, Lugiņina J, Mishnev A, Marković D. Synthesis and X-ray studies of novel 3-C-nitromethyl-hexofuranoses. Carbohydr Res 2014; 391:82-8. [DOI: 10.1016/j.carres.2014.03.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 02/28/2014] [Accepted: 03/05/2014] [Indexed: 12/20/2022]
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Lugiņina J, Rjabovs V, Belyakov S, Turks M. A concise synthesis of sugar isoxazole conjugates. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.103] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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