Asymmetric [4+2] Annulation of Cyclobutenones and Pyrazolone 4,5-Diones: Access to Novel δ-Lactone-Fused Spiropyrazolones.
DOI Number:
10.1021/acs.joc.2c00187
Reaction Category:
Educt:
cyclobutenones, pyrazolone 4,5-diones
Product:
δ-lactone-fused spiropyrazolones
Catalyst:
(9S,9′′S)-9,9′′-[(2,5-diphenyl-4,6-pyrimidinediyl)bis(oxy)]bis[10,11-dihydro-6′-methoxy-cinchonan]
Cas No:
149725-81-5
Associated Product from Buchler GmbH:
Dihydroquinidine Base
Cas No:
1435-55-8