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Beilstein J. Org. Chem. 2016, 12, 2124–2124, doi:10.3762/bjoc.12.201
Beilstein J. Org. Chem. 2016, 12, 444–461, doi:10.3762/bjoc.12.47
Graphical Abstract
Scheme 1: Breslow’s proposal on the mechanism of the benzoin condensation.
Scheme 2: Imidazolium carbene-catalysed homo-benzoin condensation.
Scheme 3: Homo-benzoin condensation in aqueous medium.
Scheme 4: Homobenzoin condensation catalysed by bis(benzimidazolium) salt 8.
Scheme 5: List of assorted chiral NHC-catalysts used for asymmetric homobenzoin condensation.
Scheme 6: A rigid bicyclic triazole precatalyst 15 in an efficient enantioselective benzoin reaction.
Scheme 7: Inoue’s report of cross-benzoin reactions.
Scheme 8: Cross-benzoin reactions catalysed by thiazolium salt 17.
Scheme 9: Catalyst-controlled divergence in cross-benzoin reactions.
Scheme 10: Chemoselective cross-benzoin reactions catalysed by a bulky NHC.
Scheme 11: Selective intermolecular cross-benzoin condensation reactions of aromatic and aliphatic aldehydes.
Scheme 12: Chemoselective cross-benzoin reaction of aliphatic and aromatic aldehydes.
Scheme 13: Cross-benzoin reactions of trifluoromethyl ketones developed by Enders.
Scheme 14: Cross-benzoin reactions of aldehydes and α-ketoesters.
Scheme 15: Enantioselective cross-benzoin reactions of aliphatic aldehydes and α-ketoesters.
Scheme 16: Dynamic kinetic resolution of β-halo-α-ketoesters via cross-benzoin reaction.
Scheme 17: Enantioselective benzoin reaction of aldehydes and alkynones.
Scheme 18: Aza-benzoin reaction of aldehydes and acylimines.
Scheme 19: NHC-catalysed diastereoselective synthesis of cis-2-amino 3-hydroxyindanones.
Scheme 20: Cross-aza-benzoin reactions of aldehydes with aromatic imines.
Scheme 21: Enantioselective cross aza-benzoin reaction of aliphatic aldehydes with N-Boc-imines.
Scheme 22: Chemoselective cross aza-benzoin reaction of aldehydes with N-PMP-imino esters.
Scheme 23: NHC-catalysed coupling reaction of acylsilanes with imines.
Scheme 24: Thiazolium salt-mediated enantioselective cross-aza-benzoin reaction.
Scheme 25: Aza-benzoin reaction of enals with activated ketimines.
Scheme 26: Isatin derived ketimines as electrophiles in cross aza-benzoin reaction with enals.
Scheme 27: Aza-benzoin reaction of aldehydes and phosphinoylimines catalysed by the BAC-carbene.
Scheme 28: Nitrosoarenes as the electrophilic component in benzoin-initiated cascade reaction.
Scheme 29: One-pot synthesis of hydroxamic esters via aza-benzoin reaction.
Scheme 30: Cookson and Lane’s report of intramolecular benzoin condensation.
Scheme 31: Intramolecular cross-benzoin condensation between aldehyde and ketone moieties.
Scheme 32: Intramolecular crossed aldehyde-ketone benzoin reactions.
Scheme 33: Enantioselective intramolecular crossed aldehyde-ketone benzoin reaction.
Scheme 34: Chromanone synthesis via enantioselective intramolecular cross-benzoin reaction.
Scheme 35: Intramolecular cross-benzoin reaction of chalcones.
Scheme 36: Synthesis of bicyclic tertiary alcohols by intramolecular benzoin reaction.
Scheme 37: A multicatalytic Michael–benzoin cascade process for cyclopentanone synthesis.
Scheme 38: Enamine-NHC dual-catalytic, Michael–benzoin cascade reaction.
Scheme 39: Iminium-cross-benzoin cascade reaction of enals and β-oxo sulfones.
Scheme 40: Intramolecular benzoin condensation of carbohydrate-derived dialdehydes.
Scheme 41: Enantioselective intramolecular benzoin reactions of N-tethered keto-aldehydes.
Scheme 42: Asymmetric cross-benzoin reactions promoted by camphor-derived catalysts.
Scheme 43: NHC-Brønsted base co-catalysis in a benzoin–Michael–Michael cascade.
Scheme 44: Divergent catalytic dimerization of 2-formylcinnamates.
Scheme 45: One-pot, multicatalytic asymmetric synthesis of tetrahydrocarbazole derivatives.
Scheme 46: NHC-chiral secondary amine co-catalysis for the synthesis of complex spirocyclic scaffolds.