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Camara VS, da Silva AL, da Luz LC, Rodembusch FS, Santiago PHO, Ellena J, Burtoloso ACB. Unveiling a Strategy for Ring Opening of Epoxides: Synthesis of 2-Hydroxyindolinylidenes Using α-Ester Sulfoxonium Ylides. Org Lett 2024; 26:1034-1039. [PMID: 38286095 DOI: 10.1021/acs.orglett.3c04169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
The untapped potential of α-carbonyl sulfoxonium ylides in epoxide ring-opening reactions has been a notable gap in current research, with such reactivity predominantly associated with the highly reactive dimethylsulfoxonium methylide. This study introduces an innovative approach wherein an epoxide indole, formed in situ from 2-hydroxyindoline-3-triethylammonium bromide, undergoes reaction with α-ester sulfoxonium ylides. The outcome is the efficient synthesis of a range of 2-hydroxyindolin-3-ylidenes, demonstrating favorable yields (41-81%) and Z/E ratios from 4:1 to those of exclusive Z isomers. Additionally, the photophysical properties of the synthesized indolinylidenes are explored, along with their derivatization using various nucleophiles under acid catalysis.
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Affiliation(s)
- Viktor S Camara
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP 13560-970, Brazil
| | - Aislan L da Silva
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP 13560-970, Brazil
| | - Lilian C da Luz
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91501-970, Brazil
| | - Fabiano S Rodembusch
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91501-970, Brazil
| | - Pedro H O Santiago
- São Carlos Institute of Physics, University of São Paulo, São Carlos, SP 13560-970, Brazil
| | - Javier Ellena
- São Carlos Institute of Physics, University of São Paulo, São Carlos, SP 13560-970, Brazil
| | - Antonio C B Burtoloso
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP 13560-970, Brazil
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Jin Y, Akagawa K, Kudo K. Spontaneous substitution of azulene-derived benzylic alcohols by thiols and its application to labeling/protection of biothiols. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.131998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Zhang B, Ren M, Xiong Y, Li H, Wu Y, Fu Y, Zhangsun D, Dong S, Luo S. Cysteine [2,4] Disulfide Bond as a New Modifiable Site of α-Conotoxin TxIB. Mar Drugs 2021; 19:md19020119. [PMID: 33671487 PMCID: PMC7926623 DOI: 10.3390/md19020119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/03/2021] [Accepted: 02/16/2021] [Indexed: 12/15/2022] Open
Abstract
α-Conotoxin TxIB, a selective antagonist of α6/α3β2β3 nicotinic acetylcholine receptor, could be a potential therapeutic agent for addiction and Parkinson's disease. As a peptide with a complex pharmacophoric conformation, it is important and difficult to find a modifiable site which can be modified effectively and efficiently without activity loss. In this study, three xylene scaffolds were individually reacted with one pair of the cysteine residues ([1,3] or [2,4]), and iodine oxidation was used to form a disulfide bond between the other pair. Overall, six analogs were synthesized with moderate isolated yields from 55% to 65%, which is four times higher than the traditional two-step oxidation with orthogonal protection on cysteines. The cysteine [2,4] modified analogs, with higher stability in human serum than native TxIB, showed obvious inhibitory effect and selectivity on α6/α3β2β3 nicotinic acetylcholine receptors (nAChRs), which was 100 times more than the cysteine [1,3] modified ones. This result demonstrated that the cysteine [2,4] disulfide bond is a new modifiable site of TxIB, and further modification can be a simple and feasible strategy for the exploitation and utilization of α-Conotoxin TxIB in drug discovery.
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Affiliation(s)
- Baojian Zhang
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (B.Z.); (M.R.); (Y.X.); (H.L.); (Y.F.); (D.Z.)
| | - Maomao Ren
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (B.Z.); (M.R.); (Y.X.); (H.L.); (Y.F.); (D.Z.)
| | - Yang Xiong
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (B.Z.); (M.R.); (Y.X.); (H.L.); (Y.F.); (D.Z.)
| | - Haonan Li
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (B.Z.); (M.R.); (Y.X.); (H.L.); (Y.F.); (D.Z.)
| | - Yong Wu
- Medical School, Guangxi University, Nanning 530004, China;
| | - Ying Fu
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (B.Z.); (M.R.); (Y.X.); (H.L.); (Y.F.); (D.Z.)
| | - Dongting Zhangsun
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (B.Z.); (M.R.); (Y.X.); (H.L.); (Y.F.); (D.Z.)
- Medical School, Guangxi University, Nanning 530004, China;
| | - Shuai Dong
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (B.Z.); (M.R.); (Y.X.); (H.L.); (Y.F.); (D.Z.)
- Correspondence: (S.D.); (S.L.)
| | - Sulan Luo
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (B.Z.); (M.R.); (Y.X.); (H.L.); (Y.F.); (D.Z.)
- Medical School, Guangxi University, Nanning 530004, China;
- Correspondence: (S.D.); (S.L.)
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Huang R, Li Z, Sheng Y, Yu J, Wu Y, Zhan Y, Chen H, Jiang B. N-Methyl-N-phenylvinylsulfonamides for Cysteine-Selective Conjugation. Org Lett 2018; 20:6526-6529. [DOI: 10.1021/acs.orglett.8b02849] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Rong Huang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China
| | - Zhihong Li
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China
| | - Yao Sheng
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China
| | - Jianghui Yu
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China
| | - Yue Wu
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China
| | - Yuexiong Zhan
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China
| | - Hongli Chen
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China
| | - Biao Jiang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China
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