Application of iridium catalyzed allylic substitution reactions in the synthesis of branched tryptamines and homologues via tandem hydroformylation–Fischer indole synthesis
作者:Bojan P. Bondzic、Andreas Farwick、Jens Liebich、Peter Eilbracht
DOI:10.1039/b809143a
日期:——
reactions with a tandem hydroformylation-Fischer indole synthesis sequence as a highly diversity-oriented strategy for the synthesis of tryptamines and homologues was explored. This modular approach allows the substituents at C3 of the indole core, the type of the amine moiety, and the distance of the amine moiety to the indole core in the final synthetic step to be defined. The starting materials required
A Novel Access to Tetrahydro-β-Carbolines via One-Pot Hydroformylation/Fischer Indole Synthesis: Rearrangement of 3,3-Spiroindoleninium Cations
作者:Bojan P. Bondzić、Peter Eilbracht
DOI:10.1021/ol801071y
日期:2008.8.21
The two component one-pot hydroformylation/Fischer indole synthesis sequence of 2,5 dihydropyrroles and phenyl hydrazines allows a facile and convenient access to tetrahydro-beta-carbolines in moderate to good yields.
Anti-Markovnikov Hydroalkylation of Allylic Amine Derivatives via a Palladium-Catalyzed Reductive Cross-Coupling Reaction
作者:Ryan J. DeLuca、Matthew S. Sigman
DOI:10.1021/ja204080s
日期:2011.8.3
Palladium-catalyzed hydroalkylation of allylic amine derivatives by alkylzinc reagents is reported. This reductive cross-coupling reaction yields anti-Markovnikov products using a variety of allylic amine protecting groups. Preliminary mechanistic studies suggest that a reversible β-hydride elimination/hydride insertion process furnishes the primary Pd-alkyl intermediate, which then undergoes transmetalation
Ir-Catalysed Asymmetric Allylic Substitutions with Cyclometalated (Phosphoramidite)Ir Complexes-Resting States, Catalytically Active (π-Allyl)Ir Complexes and Computational Exploration
作者:Jevgenij A. Raskatov、Stephanie Spiess、Christian Gnamm、Kerstin Brödner、Frank Rominger、Günter Helmchen
DOI:10.1002/chem.200903465
日期:2010.6.11
Mechanistic aspects of allylicsubstitutions with iridium catalysts derived from phosphoramidites by cyclometalation were investigated. The determination of resting states by 31P NMR spectroscopy led to the conclusion that the cyclometalation process is reversible. A novel, one‐pot procedure for the preparation of (π‐ allyl)Ircomplexes was developed, and these complexes were characterised by X‐ray
研究了通过环金属化衍生自亚磷酰胺的铱催化剂进行烯丙基取代的机理。通过31 P NMR光谱法测定静止态得出的结论是环金属化过程是可逆的。开发了一种新颖的一锅法制备(π-烯丙基)Ir配合物,并通过X射线晶体结构分析和光谱数据对这些配合物进行了表征。它们是烯丙基取代反应的全活性催化剂。对烯丙基配合物,烯丙基取代基的过渡态和产物烯烃配合物的DFT计算提供了进一步的机理见解。