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Manna A, Chatterjee S, Chakraborty I, Bhaumik T. Enantiodivergent syntheses of (+)- and (-)-1-(2,6-dimethylphenoxy)propan-2-ol: A way to access (+)- and (-)-mexiletine from D-(+)-mannitol. Carbohydr Res 2020; 487:107892. [PMID: 31901892 DOI: 10.1016/j.carres.2019.107892] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 11/30/2019] [Accepted: 12/10/2019] [Indexed: 10/25/2022]
Abstract
Chiron approach was used to acquire optically pure (R)- and (S)-1-(2,6-dimethylphenoxy)propan-2-ol, immediate precursors of (S)- and (R)-mexiletines, respectively. Two different routes were followed from a D-mannitol-derived optically pure common precursor to get the enantiomeric alcohols separately. Comparison of their specific rotation values with the corresponding literature values as well as exact mirror-image relationship between their CD curves proved their high enantiopurity. These alcohols were then transformed to the corresponding amine-drugs in an efficient one-step process instead of two steps described in the literature.
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Affiliation(s)
- Avrajit Manna
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, 700032, West Bengal, India
| | - Sandip Chatterjee
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, 700032, West Bengal, India
| | - Ipsita Chakraborty
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, 700032, West Bengal, India
| | - Tanurima Bhaumik
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, 700032, West Bengal, India.
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Elhalem E, Recio R, Werner S, Lieder F, Calderón-Montaño JM, López-Lázaro M, Fernández I, Khiar N. Sulforaphane homologues: Enantiodivergent synthesis of both enantiomers, activation of the Nrf2 transcription factor and selective cytotoxic activity. Eur J Med Chem 2014; 87:552-63. [PMID: 25299679 DOI: 10.1016/j.ejmech.2014.09.052] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 09/08/2014] [Accepted: 09/15/2014] [Indexed: 12/21/2022]
Abstract
Reported is an enantiodivergent approach for the synthesis of both enantiomers of sulforaphane (SFN) homologues with different chain lengths between the sulfinyl sulfur and the isothiocyanate groups and different substituents on the sulfinyl sulfur. The homologues were designed in order to unravel the effect of all the diversity elements included in sulforaphane's structure. The key step of the approach is the diastereoselective synthesis of both sulfinate ester epimers at sulfur, using as single chiral auxiliary the sugar derived diacetone-d-glucose. The approach allows the first synthesis of both enantiomers of 5-methylsulfinylpentyl isothiocyanate, and the biologically important 6-methylsulfinylhexyl isothiocyanate (6-HITC) found in Japanese horseradish, wasabi (Wasabia japonica). The ability of the synthesized compounds as inductors of phase II detoxifying enzymes has been studied by determining their ability to activate the cytoprotective transcription factor Nrf2. The cytotoxic activity of all the synthesized compounds against human lung adenocarcinoma (A549) and foetal lung fibroblasts (MRC-5) is also reported.
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Affiliation(s)
- Eleonora Elhalem
- Instituto de Investigaciones Químicas, C.S.I.C-Universidad de Sevilla, C/. Américo Vespucio, 49, Isla de la Cartuja, 41092 Sevilla, Spain
| | - Rocío Recio
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Sevilla, Spain
| | - Sabine Werner
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | - Franziska Lieder
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland
| | | | - Miguel López-Lázaro
- Departamento de Farmacología, Facultad de Farmacia, Universidad de Sevilla, 41012 Sevilla, Spain
| | - Inmaculada Fernández
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, 41012 Sevilla, Spain.
| | - Noureddine Khiar
- Instituto de Investigaciones Químicas, C.S.I.C-Universidad de Sevilla, C/. Américo Vespucio, 49, Isla de la Cartuja, 41092 Sevilla, Spain.
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