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Fu D, Xu J. Halide-promoted pyridinylation of α-acylmethylides with 2-halo-1-methylpyridinium iodides as reagents. Org Biomol Chem 2023; 21:1008-1013. [PMID: 36602179 DOI: 10.1039/d2ob02078e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Halide-promoted pyridinylation between α-acyl sulfonylmethylides and 2-halo-1-methylpyridinium iodides in a transition-metal-free protocol is described. A broad range of α-acyl sulfonylmethylides were transformed to bifunctionalized vinylsulfones in moderate to good yields, thereby providing a facile and practical approach for constructing methylthio- and pyridinoxyl-substituted vinylsulfones. The substrates can be extended to other acyl methylides. The reaction was shown to entail the formation of a C-O bond and consecutive breaking of C-S, C-Cl and C-N bonds.
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Affiliation(s)
- Duo Fu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.
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2
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Caiuby CAD, Furniel LG, Burtoloso ACB. Asymmetric transformations from sulfoxonium ylides. Chem Sci 2022; 13:1192-1209. [PMID: 35222906 PMCID: PMC8809404 DOI: 10.1039/d1sc05708a] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/07/2021] [Indexed: 12/11/2022] Open
Abstract
Sulfoxonium ylides are important surrogates for diazo compounds, and their use in industry as safer alternatives has been evaluated during recent years. Beyond the known classical transformations, these ylides have also been used in a surprising plethora of novel and intrinsic chemical reactions, especially in recent years. Bench stability and handling are also an advantage of this class of organosulfur molecules. Despite this, efficient asymmetric transformations, specifically catalytic enantioselective versions, have only recently been reported, and there are specific reasons for this. This perspective article covers this topic from the first studies up to the latest advances, giving personal perspectives and showing the main challenges in this area in the coming years.
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Affiliation(s)
- Clarice A D Caiuby
- São Carlos Institute of Chemistry, University of São Paulo São Carlos SP CEP 13560-970 Brazil
| | - Lucas G Furniel
- São Carlos Institute of Chemistry, University of São Paulo São Carlos SP CEP 13560-970 Brazil
| | - Antonio C B Burtoloso
- São Carlos Institute of Chemistry, University of São Paulo São Carlos SP CEP 13560-970 Brazil
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Xu M, Liu L, Wang T, Luo H, Hou M, Du L, Xin X, Lu Q, Li B. Acid-catalyzed ring-expansion of 4-(1-hydroxycyclobutyl)-1,2,3-triazoles. Org Chem Front 2022. [DOI: 10.1039/d1qo01747k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A direct ring-opening/semipinacol rearrangement reaction catalyzed by the Brønsted acid of 4-(1-hydroxycyclobutyl)-1,2,3-triazole is reported, in which the usage of metal catalysts and the reservation of sulfonyl groups are avoided.
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Affiliation(s)
- Mingchuan Xu
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Lei Liu
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Tao Wang
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Han Luo
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Meili Hou
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Luan Du
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Xiaolan Xin
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Qixing Lu
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
| | - Baosheng Li
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, 400044, P. R. China
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Chen WL, Liu ZW, Wang YC, Ma XP, Mo DL. MnSO4-Promoted S-O Bond Cleavage to Synthesize Functionalized Sulfonium Ylides from Activated Alkynes and Sulfoxides. Org Biomol Chem 2022; 20:1656-1661. [DOI: 10.1039/d1ob02491d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A variety of functionalized sulfonium ylides were prepared in good yields through MnSO4-promoted S-O bond cleavage from activated alkynes and sulfoxides. Experimental results showed that MnSO4-catalyst played important roles to...
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