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Gupta S, Sharma A, Mondal D, Bera S. Advancement of the Cleavage Methods of Carbohydrate-derived Isopropylidene and Cyclohexylidene Ketals. CURR ORG CHEM 2022. [DOI: 10.2174/1385272826666220426104217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
Carbohydrates, amino acids, and nucleosides, the fundamental building blocks of complex biomolecules in nature, are essential starting materials for the fabrication of natural and unnatural structural entities, which necessitate the masking and demasking of various functional groups with the utmost chemoselectivity, mildness, and efficiency to avoid unintended bond breaking and formation, as well as associated reactions. Ketals, benzylidene, methoxymethyl, p-methoxybenzyl, silyl ethers, trityl, tert-butyl carbamate, and other functional groups are widely used in modern organic synthesis. In carbohydrate chemistry, the commonly used protecting functionality of isopropylidene and cyclohexylidene ketals necessitates effective methods for selective cleavage. This review summarises different methods for deblocking isopropylidene and cyclohexylidene ketals using inorganic acids, Lewis acid, silica-supported inorganic acids, Amberlite-120 (H+) resin, phosphotungstic acid, Nafion-H, NaBArF4.2H2O, montmorillonite clay, Dowex 50W-X8, camphorsulphonic acid (CSA), ceric ammonium nitrate, molecular iodine, ionic liquids, zeolites and so on.
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Affiliation(s)
- Shilpi Gupta
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar-382030, India
| | - Anjali Sharma
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar-382030, India
| | - Dhananjoy Mondal
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar-382030, India
| | - Smritilekha Bera
- School of Chemical Sciences, Central University of Gujarat, Gandhinagar-382030, India
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2
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Novo Fernández O, Oliveros D, Canela Garayoa R, Balcells Fluvià M, Méndez Arteaga JJ, Eras Joli J. Introducing Lipophilicity to (Polyhydroxyalkyl)thiazolidine Carboxylic Acids Via Acylation. ACS OMEGA 2022; 7:11075-11081. [PMID: 35415335 PMCID: PMC8991926 DOI: 10.1021/acsomega.1c07078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
The therapeutic efficacy of bioactive compounds is related to their bioavailability. In turn, the bioavailability depends on the equilibrium between the hydrophilicity and the lipophilicity. 2(R,S)-(Polyhydroxyalkyl)thiazolidine-4(R) carboxylic acids (TCAs), obtained from the condensation of l-cysteine and an aldose, have been recognized as nontoxic precursors of glutathione with important preventive and therapeutic effects. The bioavailability of these compounds can be improved by enhancing their lipophilicity. This can be achieved by the introduction of some acyl groups derived from fatty acids via esterification of the aldose hydroxyl groups. With this purpose four new compounds were synthesized through a selective palmitoyl acylation of d-(-)-ribose and d-(+)-glucose and subsequent condensation with l-cysteine. In addition, the log P of the new compounds was calculated as a measure of the lipophilicity, and in vitro 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) tests were performed as a measure of the antioxidant capability.
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Affiliation(s)
- Olalla Novo Fernández
- Chemistry
Department and DBA R+D Tecnio Center, University
of Lleida, Avda. Alcalde Rovira Roure, 191, Lleida E-25198, Spain
| | - Diego Oliveros
- Chemistry
Department, Faculty of Sciences, University
of Tolima, Ibagué 730006299, Colombia
| | - Ramon Canela Garayoa
- Chemistry
Department and DBA R+D Tecnio Center, University
of Lleida, Avda. Alcalde Rovira Roure, 191, Lleida E-25198, Spain
| | - Mercè Balcells Fluvià
- Chemistry
Department and DBA R+D Tecnio Center, University
of Lleida, Avda. Alcalde Rovira Roure, 191, Lleida E-25198, Spain
| | - Jonh J. Méndez Arteaga
- Chemistry
Department, Faculty of Sciences, University
of Tolima, Ibagué 730006299, Colombia
| | - Jordi Eras Joli
- Chemistry
Department and DBA R+D Tecnio Center, University
of Lleida, Avda. Alcalde Rovira Roure, 191, Lleida E-25198, Spain
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3
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Yıldırım A. An Expedient Method for Kinetically Controlled Acetonide Formation from d-Fructose Induced by Ionic Liquid Catalyst Accompanied with SrCl2·6H2O. Catal Letters 2020. [DOI: 10.1007/s10562-020-03175-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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4
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Bruniaux S, Varma RS, Len C. A Novel Strategy for Selective O-Methylation of Glycerol in Subcritical Methanol. Front Chem 2019; 7:357. [PMID: 31165064 PMCID: PMC6536655 DOI: 10.3389/fchem.2019.00357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 04/30/2019] [Indexed: 11/13/2022] Open
Abstract
A new regioselective approach has been elaborated for the selective conversion of bio-based glycerol into the monomethyl derivative using sub/supercritical methanol. The reaction was realized in a batch process using three reactive components, namely, glycerol, methanol, and potassium carbonate to selectively produce the 3-methoxypropan-1,2-diol in mild yields; the mechanism of the O-methylation has been delineated using labeled methanol and GC-MS experiments.
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Affiliation(s)
- Sophie Bruniaux
- Sorbonne Universités, Universite de Technologie de Compiegne, Compiègne, France
| | - Rajender S Varma
- Regional Center of Advanced Technologies and Materials, Palacky University, Olomouc, Czechia
| | - Christophe Len
- Sorbonne Universités, Universite de Technologie de Compiegne, Compiègne, France.,PSL University, Chimie ParisTech, Paris, France
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5
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Zhang P, Ling CC. A mild acetolysis procedure for the regioselective removal of isopropylidene in di-O-isopropylidene-protected pyranoside systems. Carbohydr Res 2017; 445:7-13. [PMID: 28376356 DOI: 10.1016/j.carres.2017.03.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 03/27/2017] [Accepted: 03/28/2017] [Indexed: 11/19/2022]
Abstract
A mild acetolysis method for the regioselective removal of isopropylidene group from di-O-isopropylidene-protected hexopyranosides is reported. O-Isopropylidene-protected intermediates play an important role in carbohydrate chemistry, as they are often found in commercially available furanosyl and pyranosyl materials, and some of them contain more than one O-isopropylidene groups. Methods that permit regioselective removal of O-isopropylidene groups are extremely valuable, as the number of steps in the total synthesis of complex oligosaccharides could be significantly decreased. Here we report that trifluoroacetic acid (TFA)/acetic anhydride (Ac2O) can be used to regioselectively convert one of the two O-isopropylidene groups to vicinal di-O-acetates in the di-O-isopropylidene-protected galacto- and fructo-pyranosyl systems, and the reagent is compatible with some common functionalities such as sulfonate esters, bromide, azide etc.
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Affiliation(s)
- Pengfei Zhang
- Alberta Glycomics Centre, Department of Chemistry, University of Calgary, Calgary, Alberta, T2N 1N4, Canada
| | - Chang-Chun Ling
- Alberta Glycomics Centre, Department of Chemistry, University of Calgary, Calgary, Alberta, T2N 1N4, Canada.
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Fischer S, Huwyler N, Wolfrum S, Carreira EM. Synthesis and Biological Evaluation of Bromo- and Fluorodanicalipin A. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510608] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Stefan Fischer
- Laboratorium für Organische Chemie; ETH Zürich; HCI H335; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Nikolas Huwyler
- Laboratorium für Organische Chemie; ETH Zürich; HCI H335; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Susanne Wolfrum
- Laboratorium für Organische Chemie; ETH Zürich; HCI H335; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Erick M. Carreira
- Laboratorium für Organische Chemie; ETH Zürich; HCI H335; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
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Fischer S, Huwyler N, Wolfrum S, Carreira EM. Synthesis and Biological Evaluation of Bromo- and Fluorodanicalipin A. Angew Chem Int Ed Engl 2016; 55:2555-8. [PMID: 26840217 DOI: 10.1002/anie.201510608] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Indexed: 11/12/2022]
Abstract
We disclose the syntheses of (+)-bromodanicalipin A as well as (±)-fluorodanicalipin A. The relative configuration and ground-state conformation in solution of both molecules was secured by J-based configuration analysis which revealed that these are identical to natural danicalipin A. Furthermore, preliminary toxicological investigations suggest that the adverse effect of danicalipin A may be due to the lipophilicity of the halogens.
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Affiliation(s)
- Stefan Fischer
- Laboratorium für Organische Chemie, ETH Zürich, HCI H335, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Nikolas Huwyler
- Laboratorium für Organische Chemie, ETH Zürich, HCI H335, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Susanne Wolfrum
- Laboratorium für Organische Chemie, ETH Zürich, HCI H335, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Erick M Carreira
- Laboratorium für Organische Chemie, ETH Zürich, HCI H335, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland.
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Bhattacharyya B, Kundu A, Das A, Dhara K, Guchhait N. One-pot protocol for J-aggregated anthraimidazolediones catalyzed by phosphotungstic acid in PEG-400 under aerobic condition. RSC Adv 2016. [DOI: 10.1039/c5ra19190d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
One-pot protocol for anthra[1,2-d]imidazole-6,11-dione was developed via tandem cyclocondensation cum oxidation, catalyzed by phosphotungstic acid in PEG-400 support in open air. J-aggregation properties of products were confirmed by photophysical studies.
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Affiliation(s)
| | - Arijit Kundu
- Department of Chemistry
- Maulana Azad College
- Kolkata-700013
- India
| | - Aniruddha Das
- Department of Chemistry
- University College of Science & Technology
- University of Calcutta
- Kolkata-700009
- India
| | - Kaliprasanna Dhara
- Department of Chemistry
- University College of Science & Technology
- University of Calcutta
- Kolkata-700009
- India
| | - Nikhil Guchhait
- Department of Chemistry
- University College of Science & Technology
- University of Calcutta
- Kolkata-700009
- India
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Rong YW, Zhang QH, Wang W, Li BL. A Simple and Clean Method for O-Isopropylidenation of Carbohydrates. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.7.2165] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Bihani M, Bora PP, Bez G, Askari H. Amberlyst A21: A reusable solid catalyst for green synthesis of pyran annulated heterocycles at room temperature. CR CHIM 2013. [DOI: 10.1016/j.crci.2012.11.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Bora PP, Sema HA, Wahlang B, Bez G. Rapid synthesis of homoallylic alcohol from aldehyde with allyltributylstannane under solvent-free conditions. CAN J CHEM 2012. [DOI: 10.1139/v11-138] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A catalytic amount (2 mol %) of phosphotungstic acid (PTA) is sufficient to synthesize homoallylic alcohol in excellent yields from aldehyde with allyltributylstannane upon grinding under solvent-free reaction conditions. Easy handling, very short reaction time, solvent-free reaction conditions, and aqueous workup free isolation protocol may make our method very useful for synthetic chemists.
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Affiliation(s)
- Pranjal P. Bora
- Department of Chemistry, North Eastern Hill University, Shillong-793022, India
| | - H. Atoholi Sema
- Department of Chemistry, North Eastern Hill University, Shillong-793022, India
| | - Barisha Wahlang
- Department of Chemistry, North Eastern Hill University, Shillong-793022, India
| | - Ghanashyam Bez
- Department of Chemistry, North Eastern Hill University, Shillong-793022, India
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