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- W3012074287 abstract "Abstract Synthesis of highly enantioenriched bis‐spirooxindole pyrrolizidine scaffold was established using 1,3‐dipolar cycloaddition of isatin‐derived azomethine ylides by ( E )‐2‐oxoindolin‐3‐ylidene acetyl sultam with four contiguous and two quaternary stereogenic centers in generally high yields (up to 96%) and diastereoselectivities (up to 99 : 1). In addition, highly enantioenriched bis‐spirooxindole pyrrolidines were generated in high yields and highly regio‐ and ‐diastereoselectivities (up to 99 : 1) by utilizing this chiral auxiliary controlled method. The obtained cycloadducts underwent retro‐Mannich ring‐opening cyclization and produced new diastereoisomers of bis‐spirooxindole pyrrolizidine/pyrrolidines skeleton that could not be accessed by direct 1,3‐dipolar cycloaddition." @default.
- W3012074287 created "2020-03-23" @default.
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- W3012074287 date "2020-03-18" @default.
- W3012074287 modified "2023-10-02" @default.
- W3012074287 title "Synthesis of Highly Enantioenriched Bis‐spirooxindole Pyrrolizidine/Pyrrolidines through Asymmetric [3+2] Cycloaddition Reaction" @default.
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- W3012074287 doi "https://doi.org/10.1002/ajoc.202000056" @default.
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