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Beilstein J. Org. Chem. 2024, 20, 1560–1571, doi:10.3762/bjoc.20.139
Graphical Abstract
Figure 1: Schematic of (a) a PEM reactor and (b) MEA.
Scheme 1: Plausible mechanism for the reduction of 1a leading to benzylamine 2a and dibenzylamine 3a.
Scheme 2: Electrochemical reduction of cyanoarenes under optimal conditions. Reaction conditions: anode catal...
Scheme 3: Scope of the electrochemical reduction of nitroarenes. Reaction conditions: anode catalyst, Pt/C; c...
Figure 2: Hypothesis of the trap of quinoline on membrane and tetrahydroquinoline and the effect of adding an...
Figure 3: Recycled use of MEA for the electroreduction of 6a in the presence of PTSA (0.10 equiv). Reaction c...
Figure 4: Recycled use of MEA for the electroreduction of 6a in the presence of PPTS (0.10 equiv). Reaction c...
Scheme 4: Scope of the electroreduction of 6 in the presence of PTSA (0.10 equiv). Reaction conditions: anode...
Scheme 5: a) Large scale synthesis of 7a and b) electoreduction of 6a using H2SO4 as a proton source.
Scheme 6: Scope of the electroreduction of 6 in the presence of PTSA (1 equiv). Reaction conditions: anode ca...
Beilstein J. Org. Chem. 2022, 18, 1055–1061, doi:10.3762/bjoc.18.107
Scheme 1: Designed electrochemical hydrogenation of enones 1 with a PEM reactor.
Figure 1: Electrochemical setup of the PEM reactor: a) Electrochemical reduction system with the PEM reactor....
Figure 2: Reaction profile of the electrochemical hydrogenation of 1a with a PEM reactor using a) Pd/C and b)...
Scheme 2: Electrochemical hydrogenation of several enones 1 with a circulating PEM reactor using a Pd/C catho...
Scheme 3: Electrochemical hydrogenation of several enones 1 with a circulating PEM reactor using an Ir/C cath...
Scheme 4: Mechanistic studies.
Scheme 5: Electroreduction of 1a with the circulating PEM reactor using H2O as a proton source.
Beilstein J. Org. Chem. 2018, 14, 1192–1202, doi:10.3762/bjoc.14.100
Scheme 1: Generation and reaction of cationic species generated by “indirect cation pool” methods.
Figure 1: (a) 1H NMR of N-acyliminium ion C1 in CD2Cl2 at −80 °C (600 MHz). (b) Preferred conformation of C1.
Figure 2: (a) 1H NMR spectrum of C3 in CD2Cl2 at −60 °C (400 MHz). (b) Preferred conformation of C3.
Figure 3: (a) 1H NMR spectrum of C5 in CD2Cl2 at −60 °C (400 MHz). (b) Preferred conformation of C5.
Figure 4: Summary of the conformations of N-acyliminium ions C1–C6.
Figure 5: Stevens’ hypothesis on the tendency of the addition of nucleophiles to N-acyliminium ions. The subs...
Figure 6: A plausible mechanism of the observed diastereoselective reaction of the N-acyliminium ions.
Figure 7: Comparison of ΔG for the pseudo-equatorial and pseudo-axial conformations of C1–C6 at the B3LYP/6-3...