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Luo T, Xu TT, Guo YF, Dong H. SnCl 4 Promoted Efficient Cleavage of Acetal/Ketal Groups with the Assistance of Water in CH 2Cl 2. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238258. [PMID: 36500346 PMCID: PMC9736348 DOI: 10.3390/molecules27238258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/23/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022]
Abstract
Acetalization and deacetalation are a pair of routine manipulations to protect and deprotect the 4- and 6-hydroxyl groups of glycosides in the synthesis of glycosyl building blocks. In this study, we found that treatment of SnCl4 with various carbohydrates containing acetal/ketal groups with the assistance of water in CH2Cl2 led to deacetalization/deketalization products in almost quantitative yields. In addition, for substrates containing both acetal/ketal and p-methoxylbenzyl groups, we also found that the p-methoxylbenzyl group was selectively cleaved by the use of a catalytic amount of SnCl4, while the acetal/ketal groups remained. Furthermore, based on this, 4,6-benzylidene glycosides can be conveniently converted to 4,6-OAc or 4-OH, 6-OAc glycosides.
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Loureiro DRP, Soares JX, Maia A, Silva AMN, Rangel M, Azevedo CMG, Hansen SV, Ulven T, Pinto MMM, Reis S, Afonso CMM. One‐Pot Synthesis of Xanthone by Carbonylative Suzuki Coupling Reaction. ChemistrySelect 2021. [DOI: 10.1002/slct.202101394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Daniela R. P. Loureiro
- Department of Chemical Sciences Laboratory of Organic and Pharmaceutical Chemistry Faculty of Pharmacy University of Porto Rua de Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
- Interdisciplinary Center of Marine and Environmental Investigation (CIIMAR/CIMAR) Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n 4050-208 Matosinhos Porto Portugal
- LAQV-REQUIMTE Department of Chemical Sciences Laboratory of Applied Chemistry Faculty of Pharmacy University of Porto Rua de Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
| | - José X. Soares
- LAQV-REQUIMTE Department of Chemical Sciences Laboratory of Applied Chemistry Faculty of Pharmacy University of Porto Rua de Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
| | - Ana Maia
- Department of Chemical Sciences Laboratory of Organic and Pharmaceutical Chemistry Faculty of Pharmacy University of Porto Rua de Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
| | - André M. N. Silva
- LAQV-REQUIMTE Department of Chemistry and Biochemistry Faculty of Sciences University of Porto Faculty of Sciences University of Porto Campo Alegre Street 4169-007 Porto Portugal
| | - Maria Rangel
- LAQV-REQUIMTE Instituto de Ciências Biomédicas Abel Salazar University of Porto José Viterbo Ferreira Street No. 228 4050-313 Porto Portugal
| | - Carlos M. G. Azevedo
- Department of Physics Chemistry and Pharmacy University of Southern Denmark Campusvej 55 5230 Odense M Denmark
| | - Steffen V. Hansen
- Department of Physics Chemistry and Pharmacy University of Southern Denmark Campusvej 55 5230 Odense M Denmark
| | - Trond Ulven
- Department of Drug Design and Pharmacology University of Copenhagen Universitetsparken 2 2100 Copenhagen Denmark
| | - Madalena M. M. Pinto
- Department of Chemical Sciences Laboratory of Organic and Pharmaceutical Chemistry Faculty of Pharmacy University of Porto Rua de Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
- Interdisciplinary Center of Marine and Environmental Investigation (CIIMAR/CIMAR) Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n 4050-208 Matosinhos Porto Portugal
| | - Salette Reis
- LAQV-REQUIMTE Department of Chemical Sciences Laboratory of Applied Chemistry Faculty of Pharmacy University of Porto Rua de Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
| | - Carlos M. M. Afonso
- Department of Chemical Sciences Laboratory of Organic and Pharmaceutical Chemistry Faculty of Pharmacy University of Porto Rua de Jorge Viterbo Ferreira, 228 4050-313 Porto Portugal
- Interdisciplinary Center of Marine and Environmental Investigation (CIIMAR/CIMAR) Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n 4050-208 Matosinhos Porto Portugal
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Chang CW, Lin MH, Chan CK, Su KY, Wu CH, Lo WC, Lam S, Cheng YT, Liao PH, Wong CH, Wang CC. Automated Quantification of Hydroxyl Reactivities: Prediction of Glycosylation Reactions. Angew Chem Int Ed Engl 2021; 60:12413-12423. [PMID: 33634934 DOI: 10.1002/anie.202013909] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 02/07/2021] [Indexed: 12/17/2022]
Abstract
The stereoselectivity and yield in glycosylation reactions are paramount but unpredictable. We have developed a database of acceptor nucleophilic constants (Aka) to quantify the nucleophilicity of hydroxyl groups in glycosylation influenced by the steric, electronic and structural effects, providing a connection between experiments and computer algorithms. The subtle reactivity differences among the hydroxyl groups on various carbohydrate molecules can be defined by Aka, which is easily accessible by a simple and convenient automation system to assure high reproducibility and accuracy. A diverse range of glycosylation donors and acceptors with well-defined reactivity and promoters were organized and processed by the designed software program "GlycoComputer" for prediction of glycosylation reactions without involving sophisticated computational processing. The importance of Aka was further verified by random forest algorithm, and the applicability was tested by the synthesis of a Lewis A skeleton to show that the stereoselectivity and yield can be accurately estimated.
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Affiliation(s)
- Chun-Wei Chang
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Mei-Huei Lin
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Chieh-Kai Chan
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Kuan-Yu Su
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Chia-Hui Wu
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Wei-Chih Lo
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Sarah Lam
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Yu-Ting Cheng
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Pin-Hsuan Liao
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Chi-Huey Wong
- The Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan.,Department of Chemistry, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, 92037, USA
| | - Cheng-Chung Wang
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan.,Chemical Biology and Molecular Biophysics Program, Taiwan International Graduate Program (TIGP), Academia Sinica, Taipei, 115, Taiwan
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Chang C, Lin M, Chan C, Su K, Wu C, Lo W, Lam S, Cheng Y, Liao P, Wong C, Wang C. Automated Quantification of Hydroxyl Reactivities: Prediction of Glycosylation Reactions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202013909] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Chun‐Wei Chang
- Institute of Chemistry Academia Sinica Taipei 115 Taiwan
| | - Mei‐Huei Lin
- Institute of Chemistry Academia Sinica Taipei 115 Taiwan
| | - Chieh‐Kai Chan
- Institute of Chemistry Academia Sinica Taipei 115 Taiwan
| | - Kuan‐Yu Su
- Institute of Chemistry Academia Sinica Taipei 115 Taiwan
| | - Chia‐Hui Wu
- Institute of Chemistry Academia Sinica Taipei 115 Taiwan
| | - Wei‐Chih Lo
- Institute of Chemistry Academia Sinica Taipei 115 Taiwan
| | - Sarah Lam
- Institute of Chemistry Academia Sinica Taipei 115 Taiwan
| | - Yu‐Ting Cheng
- Institute of Chemistry Academia Sinica Taipei 115 Taiwan
| | - Pin‐Hsuan Liao
- Institute of Chemistry Academia Sinica Taipei 115 Taiwan
| | - Chi‐Huey Wong
- The Genomics Research Center Academia Sinica Taipei 115 Taiwan
- Department of Chemistry The Scripps Research Institute 10550 N Torrey Pines Road La Jolla 92037 USA
| | - Cheng‐Chung Wang
- Institute of Chemistry Academia Sinica Taipei 115 Taiwan
- Chemical Biology and Molecular Biophysics Program Taiwan International Graduate Program (TIGP) Academia Sinica Taipei 115 Taiwan
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