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- W2184473772 abstract "Abstract A new enantioselective route to spiro[piperidine‐3,3′‐oxindoles] from isatin ketimines is described. The aza‐Henry reaction of N ‐Boc‐isatin ketimines with methyl 4‐nitrobutyrate in the presence of a Ph 2 BOX‐CuBr 2 complex provided the corresponding nitro amino esters with good diastereoselectivity and excellent enantioselectivity (up to >99% ee ). The aza‐Henry adducts were transformed into spiro[piperidine‐3,3′‐oxindoles] after reduction of the nitro group to oxime, and cleavage of the N ‐Boc group and lactamisation. magnified image" @default.
- W2184473772 created "2016-06-24" @default.
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- W2184473772 date "2015-12-04" @default.
- W2184473772 modified "2023-10-18" @default.
- W2184473772 title "Aza-Henry Reaction of Isatin Ketimines with Methyl 4-Nitrobutyrate en Route to Spiro[piperidine-3,3′-oxindoles]" @default.
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- W2184473772 doi "https://doi.org/10.1002/adsc.201500716" @default.
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