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- W2950065248 abstract "The asymmetric [1,3] dipolar cycloaddition reactions of azomethine ylides derived from 5,6-diphenylmorpholin-2-one with various aldehydes and ethyl oxindolylideneacetate are described. Addition of an aldehyde to the morpholin-2-one, under essentially neutral conditions, results in the preferential formation of the E-ylide which then reacts with the dipolarophile to yield spirooxindole pyrrolidine derivatives in moderate to excellent regio- and diastereoselectivities. The resulting cycloadducts were easily separated by column chromatography and converted to the corresponding amino acid methyl esters through catalytic hydrogenolysis." @default.
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- W2950065248 date "2002-01-01" @default.
- W2950065248 modified "2023-10-18" @default.
- W2950065248 title "The Synthesis of Spirooxindole Pyrrolidines via an Asymmetric Azomethine Ylide [1,3]-Dipolar Cycloaddition Reaction" @default.
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- W2950065248 doi "https://doi.org/10.3987/com-02-s(m)51" @default.
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