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.
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.