N-苄基苯胺的实际光化学环化已获得取代的菲啶,例如天然产物三色胺。以氟取代基和受保护的邻苯二酚为重点的功能在 A 和 C 环上都具有良好的耐受性。从碘化底物获得的菲啶以良好到非常好的产率(高达 95%)获得,而溴化底物相比之下表现不佳(0-48%)。取代的菲啶,如天然产物三色胺,可以通过 N-苄基苯胺的实际光化学环化获得,在 A 和 C 环上都具有耐受性。菲啶可以从碘化底物获得良好到非常好的产率(高达 95 %),而溴化底物的性能较差(0-48 %)。
N-苄基苯胺的实际光化学环化已获得取代的菲啶,例如天然产物三色胺。以氟取代基和受保护的邻苯二酚为重点的功能在 A 和 C 环上都具有良好的耐受性。从碘化底物获得的菲啶以良好到非常好的产率(高达 95%)获得,而溴化底物相比之下表现不佳(0-48%)。取代的菲啶,如天然产物三色胺,可以通过 N-苄基苯胺的实际光化学环化获得,在 A 和 C 环上都具有耐受性。菲啶可以从碘化底物获得良好到非常好的产率(高达 95 %),而溴化底物的性能较差(0-48 %)。
作者:Giovanelli, Riccardo、Monda, Giulia、Kiriakidi, Sofia、Silva López, Carlos、Bertuzzi, Giulio、Bandini, Marco
DOI:10.1002/chem.202401658
日期:——
A new nickel catalyzed cross‐electrophile coupling for accessing γ‐lactams (isoindolinones) as well as γ‐lactones (isobenzofuranones) via carbonylation with CO2 is documented. The protocol exploits the synergistic role of redox‐active Ni(II) complexes and AlCl3 as a CO2 activator/oxygen scavenger, leading to the formation of a wide range of cyclic amides and esters (28 examples) in good to high yields (up to 87%). A dedicated computational investigation revealed the multiple roles played by AlCl3. In particular, the simultaneous transient protection of the pendant amino group of the starting reagents and the formation of the electrophilically activated CO2‐AlCl3 adduct are shown to concur in paving the way for an energetically favorable mechanistic pathway.
Photochemical Synthesis of Phenanthridines: Exploring Fluoro and Protected Catechol Substitution
作者:Anna M. Linsenmeier、Craig M. Williams、Stefan Bräse
DOI:10.1002/ejoc.201300218
日期:2013.6
Substitutedphenanthridines, such as the natural product trispheridine, have been accessed by the practical photochemical cyclization of N-benzylanilines. Functionalities, with a focus on fluoro substituents and protectedcatechols, are well tolerated on both the A and C rings. The phenanthridines were accessed in good to very good yields (up to 95 %) from iodinated substrates, whereas brominated substrates
N-苄基苯胺的实际光化学环化已获得取代的菲啶,例如天然产物三色胺。以氟取代基和受保护的邻苯二酚为重点的功能在 A 和 C 环上都具有良好的耐受性。从碘化底物获得的菲啶以良好到非常好的产率(高达 95%)获得,而溴化底物相比之下表现不佳(0-48%)。取代的菲啶,如天然产物三色胺,可以通过 N-苄基苯胺的实际光化学环化获得,在 A 和 C 环上都具有耐受性。菲啶可以从碘化底物获得良好到非常好的产率(高达 95 %),而溴化底物的性能较差(0-48 %)。