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• W2997039273 endingPage "399" @default.
• W2997039273 startingPage "395" @default.
• W2997039273 abstract "A highly enantioselective formal [4 + 2] annulation involving electron-deficient allenes as C2-synthons has been developed under bifunctional phosphonium salt catalysis. With this catalytic protocol, a wide range of synthetically interesting and highly functionalized chiral 4H-pyran derivatives were readily prepared in good yields (up to 99%) with outstanding diastereo- and enantioselectivities (up to >20:1 dr, up to >99.9% ee). The utility and the practicality of this method were demonstrated by the gram-scale reaction and facile elaboration. Of note, this is the first example of an asymmetric annulation reaction involving allenic reactants under a phase-transfer catalysis system." @default.
• W2997039273 created "2020-01-10" @default.
• W2997039273 creator A5013978751 @default.
• W2997039273 creator A5018468640 @default.
• W2997039273 creator A5026825966 @default.
• W2997039273 creator A5030174132 @default.
• W2997039273 creator A5030755202 @default.
• W2997039273 creator A5034755490 @default.
• W2997039273 creator A5054171444 @default.
• W2997039273 date "2019-12-31" @default.
• W2997039273 modified "2023-10-14" @default.
• W2997039273 title "Enantioselective Synthesis of Multifunctionalized 4<i>H</i>-Pyrans via Formal [4 + 2] Annulation Process by Bifunctional Phosphonium Salt Catalysis" @default.
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