Asymmetric synthesis of isoxazole and trifluoromethyl-containing 3,2′-pyrrolidinyl dispirooxindoles via squaramide-catalysed [3 + 2] cycloaddition reactions.
DOI Number:
10.1039/D1OB02350K
Reaction Category:
Educt:
3-methyl-4-nitro-5-isatylidenyl-isoxazoles, N-2,2,2-trifluoroethylisatin ketimines
Product:
isoxazole and trifluoromethyl-containing 3,2′-pyrrolidinyl dispirooxindoles
Catalyst:
3-[[(8α,9S)-6′-methoxycinchonan-9-yl]amino]-4-[[4-(trifluoromethyl)phenyl]amino]-3-cyclobutene-1,2-dione
Cas No:
1256245-85-8
Associated Product from Buchler GmbH:
Quinine Base
Cas No:
130-95-0