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Io KW, Shek HL, Li TY, Li KK, Chan DSH, Yiu SM, Wong CY. Controlling Chemoselectivity in Ruthenium(II)-Induced Cyclization of Aniline-Functionalized Alkynes. Chemistry 2024:e202402959. [PMID: 39367668 DOI: 10.1002/chem.202402959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2024] [Revised: 09/05/2024] [Accepted: 10/04/2024] [Indexed: 10/06/2024]
Abstract
The cyclization of heteroatom-functionalized alkynes induced by d6-transition-metal centers has traditionally been associated with the vinylidene pathway. However, recent evidence suggests that d6-transition-metal centers can also activate alkynes through non-vinylidene pathways. In this study, we conducted a comprehensive experimental and theoretical investigation into the reactions between the Ru(II) complex [Ru([9]aneS3)(bpy)(OH2)]2+ and 2-alkynylanilines. Our study revealed that the selectivity between the vinylidene and non-vinylidene pathways can be tuned by reaction temperature, substrate, and solvent polarity. This strategic control allows for the preferential formation of either C2- or C3-metalated indole zwitterion complexes. Additionally, we identified a rare decyclization mechanism that enables the conversion of C2-metalated indoles to C3-metalated indoles, underscoring the significance of product stability in these pathways. Overall, this work demonstrates practical approaches to control the preference between vinylidene and non-vinylidene pathways, which is crucial for the design of new catalysts and metalated heterocyclic complexes.
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Affiliation(s)
- Kai-Wa Io
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Hau-Lam Shek
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Tsun-Yin Li
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Ka-Kit Li
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Daniel Shiu-Hin Chan
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Shek-Man Yiu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Chun-Yuen Wong
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
- State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
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Shek HL, Tam KT, Yiu SM, Tse MK, Morris RH, Wong CY. Osmium(II)-Induced Rearrangement of Allenols for Metallafuran Complexes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hau-Lam Shek
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - King-Ting Tam
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Shek-Man Yiu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Man-Kit Tse
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Robert H. Morris
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Chun-Yuen Wong
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
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Yeung CF, Tang SH, Yang Z, Li TY, Li KK, Chan YM, Shek HL, Io KW, Tam KT, Yiu SM, Tse MK, Wong CY. Ruthenafuran Complexes Supported by the Bipyridine-Bis(diphenylphosphino)methane Ligand Set: Synthesis and Cytotoxicity Studies. Molecules 2022; 27:molecules27051709. [PMID: 35268810 PMCID: PMC8911682 DOI: 10.3390/molecules27051709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 02/22/2022] [Accepted: 03/03/2022] [Indexed: 11/16/2022] Open
Abstract
Mononuclear and dinuclear Ru(II) complexes cis-[Ru(κ2-dppm)(bpy)Cl2] (1), cis-[Ru(κ2-dppe)(bpy)Cl2] (2) and [Ru2(bpy)2(μ-dpam)2(μ-Cl)2](Cl)2 ([3](Cl)2) were prepared from the reactions between cis(Cl), cis(S)-[Ru(bpy)(dmso-S)2Cl2] and diphosphine/diarsine ligands (bpy = 2,2′-bipyridine; dppm = 1,1-bis(diphenylphosphino)methane; dppe = 1,2-bis(diphenylphosphino)ethane; dpam = 1,1-bis(diphenylarsino)methane). While methoxy-substituted ruthenafuran [Ru(bpy)(κ2-dppe)(C^O)]+ ([7]+; C^O = anionic bidentate [C(OMe)CHC(Ph)O]− chelate) was obtained as the only product in the reaction between 2 and phenyl ynone HC≡C(C=O)Ph in MeOH, replacing 2 with 1 led to the formation of both methoxy-substituted ruthenafuran [Ru(bpy)(κ2-dppm)(C^O)]+ ([4]+) and phosphonium-ring-fused bicyclic ruthenafuran [Ru(bpy)(P^C^O)Cl]+ ([5]+; P^C^O = neutral tridentate [(Ph)2PCH2P(Ph)2CCHC(Ph)O] chelate). All of these aforementioned metallafuran complexes were derived from Ru(II)–vinylidene intermediates. The potential applications of these metallafuran complexes as anticancer agents were evaluated by in vitro cytotoxicity studies against cervical carcinoma (HeLa) cancer cell line. All the ruthenafuran complexes were found to be one order of magnitude more cytotoxic than cisplatin, which is one of the metal-based anticancer agents being widely used currently.
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Affiliation(s)
- Chi-Fung Yeung
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
- State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Sik-Him Tang
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Zhe Yang
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Tsun-Yin Li
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Ka-Kit Li
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Yuen-Man Chan
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Hau-Lam Shek
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Kai-Wa Io
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - King-Ting Tam
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Shek-Man Yiu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Man-Kit Tse
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
| | - Chun-Yuen Wong
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; (C.-F.Y.); (S.-H.T.); (Z.Y.); (T.-Y.L.); (K.-K.L.); (Y.-M.C.); (H.-L.S.); (K.-W.I.); (K.-T.T.); (S.-M.Y.); (M.-K.T.)
- State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
- Correspondence: ; Tel.: +852-3442-6831
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Yeung CF, Shek HL, Yiu SM, Tse MK, Wong CY. Controlled Activation of Dipicolinyl-Substituted Propargylic Alcohol by Ru(II) and Os(II) for Unprecedented Indolizine-Fused Metallafuran Complexes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00197] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Chi-Fung Yeung
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
- State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Hau-Lam Shek
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Shek-Man Yiu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Man-Kit Tse
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Chun-Yuen Wong
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
- State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
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