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The use of iminopyridines as efficient ligands in the palladium(II)-catalyzed cyclization of (Z)-4′-acetoxy-2′-butenyl 2-alkynoates |
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| Authors: | Juan Song Fan Xu |
| Affiliation: | a Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou, China b State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China |
| Abstract: | Iminopyridines were found to be a sort of efficient bidentate ligands for the palladium(II)-catalyzed cyclization of (Z)-4′-acetoxy-2′-butenyl 2-alkynoates in acetic acid to afford the α-(Z)-acetoxyalkylidene-β-vinyl-γ-butyrolactones. The iminopyridine ligands could not only inhibit β-hydride elimination but also stabilize the vinyl-palladium intermediate in acetic acid in the reaction. |
| Keywords: | Iminopyridines β-Hydride elimination β-Heteroatom elimination Palladium(II)-catalyzed reactions α-Alkylidene-γ-lactones |
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