Organocatalytic and enantioselective [4+2] cyclization between hydroxymaleimides and ortho-hydroxyphenyl para-quinone methide-selective preparation of chiral hemiketals.
DOI Number:
10.1039/D0CC06777F
Reaction Category:
MOP ID:
MOP_0000565
Educt:
hydroxymaleimides, ortho-hydroxyphenyl para-quinone
Product:
substituted (3aS,9S,9aR)-9-(3,5-di-tert-butyl-4-hydroxyphenyl)-3a-hydroxy-9,9a-dihydrochromeno[2,3-c]pyrrole-1,3(2H,3aH)-dione
Catalyst:
3-[[3,5-bis(trifluoromethyl)phenyl]amino]-4- [(8α,9S)-cinchonan-9-ylamino]- 3-Cyclobutene-1,2-dione
Cas No:
1256245-86-9
Associated Product from Buchler GmbH:
Cinchonidine Base
Cas No:
485-71-2