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- W2155992406 abstract "Abstract The 1,3-dipolar cycloaddition of an azomethine ylide to 1-methyl-3,5-bis[(E)-arylmethylidene]tetrahydro-4(1H)-pyridinones afforded novel spiro-pyrrolidines in good yields. Further cycloaddition of these spiro-pyrrolidines with nitrile oxide afforded mono-spiro-isoxazolines in moderate yields (45–56%), presumably via a di-spiro intermediate, which undergoes a spontaneous cycloreversion of the spiro-pyrrolidine unit. In contrast, the direct cycloaddition of nitrile oxide to 1-methyl-3,5-bis[(E)-arylmethylidene]tetrahydro-4(1H)-pyridinones gave the mono-spiro-isoxazoline as the minor product, while the bis-spiro-isoxazolines are formed predominantly." @default.
- W2155992406 created "2016-06-24" @default.
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- W2155992406 date "2008-03-11" @default.
- W2155992406 modified "2023-09-24" @default.
- W2155992406 title "ChemInform Abstract: Sacrificial Azomethine Ylide Cycloaddition Controlled Chemoselective Nitrile Oxide Cycloaddition to 1-Methyl-3,5-bis[(E)-arylmethylidene]tetrahydro-4(1H)-pyridinones: Formation of Mono-spiro-isoxazolines." @default.
- W2155992406 cites W2951958634 @default.
- W2155992406 doi "https://doi.org/10.1002/chin.200811136" @default.
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