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

Cas No:

485-71-2