Exploration of [2 + 2 + 2] cyclotrimerisation methodology to prepare tetrahydroisoquinoline-based compounds with potential aldo–keto reductase 1C3 target affinity
作者:Ana R. N. Santos、Helen M. Sheldrake、Ali I. M. Ibrahim、Chhanda Charan Danta、Davide Bonanni、Martina Daga、Simonetta Oliaro-Bosso、Donatella Boschi、Marco L. Lolli、Klaus Pors
DOI:10.1039/c9md00201d
日期:——
Tetrahydroisoquinoline (THIQ) is a key structural component in many biologically active molecules including natural products and synthetic pharmaceuticals.
四氢异喹啉(THIQ)是许多生物活性分子中的一个关键结构成分,包括天然产物和合成药物。
Amidopalladation of Alkoxyallenes Applied in the Synthesis of an Enantiopure 1-Ethylquinolizidine Frog Alkaloid
作者:Sape S. Kinderman、René de Gelder、Jan H. van Maarseveen、Hans E. Schoemaker、Henk Hiemstra、Floris P. J. T. Rutjes
DOI:10.1021/ja039919j
日期:2004.4.1
A palladium-catalyzed amidation of alkoxyallenes has been developed for the construction of linear allylic N,O-acetals under basic conditions involving (cyclic) amides, sulfonamides, carbamates, and amidophosphates. Application of the methodology provided access to the enantiopure 1-ethylquinolizidine structural motif, which is a key synthon in the synthesis of the naturally occurring poisonous frog quinolizidine 233A and derivatives such as the 1-epi-isomer of quinolizidine 207I.
Palladium-Catalyzed Coupling/Cyclization Reactions of Allene-Substituted Lactams
omega-(2,3-Butadienyl)lactams react with aryl iodides in the presence of n-Bu4NCl, K2CO3 and a catalytic amount of Pd(PPh3)(4) to give bicyclic enamides resulting from attack of nitrogen on the central carbon and transfer of the aryl group to the terminal carbon atom of the allene. (C) 1997 Elsevier Science Ltd.
Synthesis of Exo- and Endocyclic Enamides Through Copper-Catalyzed Regioselective Intramolecular <i>N</i>
-Halovinylation
copper‐catalyzed cross‐coupling of 1,2‐dihaloalkenes and amides leads to cyclic β‐haloenamides, which can participate in a second cross‐coupling reaction to efficiently synthesize highly functionalized cyclic enamides. The selectivity of the intramolecular coupling between exo‐ and endocyclic regioisomers is a crucial synthetic factor and can be influenced by the structure of the substrate and the reaction conditions
A Palladium-Catalyzed Aminoalkynylation Strategy towards Bicyclic Heterocycles: Synthesis of (±)-Trachelanthamidine
作者:Stefano Nicolai、Cyril Piemontesi、Jérôme Waser
DOI:10.1002/anie.201100718
日期:2011.5.9
Sweet cyclizations: The synthesis of pyrrolizidines and indolizidines has been achieved. Olefins were subjected to an intramolecular palladium‐catalyzed aminoalkynylation with the hypervalent iodine reagent TIPS‐EBX. After removal of the protecting group, a two‐step cyclization sequence and subsequent reduction led to the natural product (±)‐trachelanthamidine (see scheme; TIPS‐EBX=triisopropylsilyl