Enantioselective Synthesis of Unsymmetrical Diaryl‐Substituted Spirocyclohexanonepyrazolones through a Cascade [4+2] Double Michael Addition.
DOI Number:
10.1002/adsc.201200925
Reaction Category:
RXNO ID:
RXNO_0000009
Educt:
substituted 4-methylene-2,4-dihydro-3H-pyrazol-3-one, α,β-unsaturated ketones
Product:
Spirocyclohexanonepyrazolones
Catalyst:
2-fluorobenzoic acid, (9R)-6′-methoxy-cinchonan-9-amine
Cas No:
287979-82-2
Associated Product from Buchler GmbH:
Quinidine Base
Cas No:
56-54-2