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Beilstein J. Org. Chem. 2021, 17, 2340–2347, doi:10.3762/bjoc.17.152
Graphical Abstract
Figure 1: Biologically active phenanthridines.
Figure 2: Synthetic routes to phenanthridines via iminyl radicals.
Scheme 1: Previous unexpected synthesis of the phenanthridine framework.
Scheme 2: Synthesis of biaryl benzaldehydes.
Scheme 3: Synthesis of biaryl oximes.
Scheme 4: Synthesis of phenanthridines. Reagents and conditions (i) UV irradiation (450 W medium pressure Hg ...
Figure 3: Two possible mechanistic routes and intermediates in the synthesis of phenanthridines.
Scheme 5: Synthesis of trisphaeridine. Reagents and conditions (i) cat. Pd(PPh3)4, aq Na2CO3, DME, reflux, Ar...
Beilstein J. Org. Chem. 2021, 17, 1440–1446, doi:10.3762/bjoc.17.99
Figure 1: Structure of pavettamine 1 and its enantiomer 2.
Scheme 1: Established route for the synthesis of intermediate 4 [1].
Scheme 2: Alternative route. Reaction conditions: a) TrCl, pyridine, rt, overnight, 100%; b) DMAP, imidazole,...
Figure 2: Crystal structure of compound 9.
Scheme 3: Sequence showing the source of compound 9.
Scheme 4: Stereoselective reduction of intermediate 8 as key step towards intermediate 4. Reaction conditions...
Figure 3: Single crystal X-ray structure of compound 4.
Scheme 5: Synthesis of the C5 fragments from intermediate 4. Reaction conditions: a) i) TFAA, collidine, 0 °C...
Scheme 6: Synthesis of ent-pavettamine as the TFA salt 28. Reaction conditions: a) IBX, DMSO, rt, overnight, ...