A multicomponent approach to the synthesis of N-sulfonyl β2,3-amino esters
作者:Erwan Le Gall、Stéphane Sengmany、Issa Samb、Sabrina Benakrour、Christopher Colin、Antoine Pignon、Eric Léonel
DOI:10.1039/c3ob42353k
日期:——
The multicomponent synthesis of α,β-disubstituted N-sulfonyl β-amino esters is described. It involves a zinc-mediated, cobalt-catalyzed three-component reaction between sulfonylimines, acrylates and organic bromides. A possible mechanism is proposed, emphasizing the intermediate formation of an organocobalt as the initiator of a Mannich-like process.
Straightforward Route! [RuCl2(p‐cymene)]2 promoted amide‐directed hydroarylation of aldimines in the presence of a catalytic amount of base gives the corresponding isoindolinone derivatives. A variety of amides and saldimines participated in the present Ru‐catalyzed reaction to furnish the corresponding isoindolinones in moderate to high yield. A variety of amides and aldimines participated in the
The Generation of Difluoroketenimine and Its Application in the Synthesis of α,α‐Difluoro‐β‐amino Amides
作者:Rui Zhang、Zhikun Zhang、Qi Zhou、Lefei Yu、Jianbo Wang
DOI:10.1002/anie.201901591
日期:2019.4.16
Fluorine‐containing β‐amino acids and their derivatives have attracted significant attention due to their importance in life sciences. Herein the previously unknown difluoroketenimine, the analogue of the elusive difluoroketene, has been generated by the reaction of difluorocarbene and isocyanide, which further undergoes [2+2] cycloaddition with imine. The three‐component reaction affords α,α‐difluoro‐β‐amino amides
Iridium-Catalyzed Annulation of Aromatic Imines with 1,3-Dienes<i>via</i>Direct Functionalization of an Aromatic CH Bond
作者:Yusuke Ebe、Miyuki Hatano、Takahiro Nishimura
DOI:10.1002/adsc.201401171
日期:2015.5.4
to give 1‐aminoindane derivatives in high yields with high regio‐ and stereoselectivities. The iridium complex coordinated with a substrate 1,3‐diene displayed high catalyticactivity. The reaction proceeds via the direct formation of the aryliridium(I) species from the aromatic aldimine and an iridium(I) acetate species via a concerted metalation‐deprotonation pathway.
Independence from the Sequence of Single-Electron Transfer of Photoredox Process in Redox-Neutral Asymmetric Bond-Forming Reaction
作者:Tomohito Kizu、Daisuke Uraguchi、Takashi Ooi
DOI:10.1021/acs.joc.6b00445
日期:2016.8.19
chiral (arylamino)phosphonium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate under visible light irradiation. This achievement clearly demonstrates the insensitivity of this redox-neutral asymmetric reaction to the sequence of the key redox events involved in the synergistic catalysis.