Monoamine Oxidase (MAO-N) Whole Cell Biocatalyzed Aromatization of 1,2,5,6-Tetrahydropyridines into Pyridines
摘要:
A sustainable MAO-N biocatalyzed process for the synthesis of pyridines from aliphatic tetrahydropyridines (THP) has been developed. Pyridine compounds were synthesized under mild reaction conditions and with high conversion, exploiting MAO-N whole cells as aromatizing biocatalysts. The kinetic profile of the whole cell biocatalytic transformation was finally investigated via in situ F-19 NMR.
Microwave-Assisted Suzuki Coupling Reactions with an Encapsulated Palladium Catalyst for Batch and Continuous-Flow Transformations
作者:Ian R. Baxendale、Charlotte M. Griffiths-Jones、Steven V. Ley、Geoffrey K. Tranmer
DOI:10.1002/chem.200501400
日期:2006.5.24
This article describes the design, optimisation and development of a Suzuki cross-coupling protocol mediated by an efficient palladium-encapsulated catalyst (Pd EnCat) under microwave irradiation. The methodology has been used in both batch mode for classical library preparation and in continuous-flow applications furnishing multigram quantities of material. Described is a method that uses direct focused
Vesicular Monoamine Transporter Substrate/Inhibitor Activity of MPTP/MPP<sup>+</sup> Derivatives: A Structure–Activity Study
作者:D. Shyamali Wimalasena、Rohan P. Perera、Bruce J. Heyen、Inoka S. Balasooriya、Kandatege Wimalasena
DOI:10.1021/jm070875p
日期:2008.2.1
number of MPTP and MPP(+) derivatives that are suitable for the comparative neurotoxicity and complexIinhibition versus dopamine metabolism perturbation studies. Structure-activity studies with bovine chromaffin granule ghosts show that 3'-hydroxy-MPP(+) is one of the best known substrates for the vesicular monoamine transporter (VMAT). A series of compounds that combine the structural features of
Synthesis of functionalized 4-phenyl-pyridines via electrochemically prepared organozinc reagents
作者:Erwan Le Gall、Corinne Gosmini、Jean-Yves Nédélec、Jacques Périchon
DOI:10.1016/s0040-4020(01)00015-1
日期:2001.3
The efficient and convenient synthesis of various functionalized 4-phenyl-pyridines 2 is described. The key step of the procedure is the electrochemical formation of aromatic organozincreagents 1 and their coupling with pyridinium salts. Intermediate 1,4-dihydropyridines are oxidized using mild conditions to provide functionalized 4-phenyl-pyridines in moderate to high overall yields.
Mechanistic Studies of the Palladium-Catalyzed Desulfinative Cross-Coupling of Aryl Bromides and (Hetero)Aryl Sulfinate Salts
作者:Antoine de Gombert、Alasdair I. McKay、Christopher J. Davis、Katherine M. Wheelhouse、Michael C. Willis
DOI:10.1021/jacs.9b13260
日期:2020.2.19
Pyridine and related heterocyclic sulfinates have recently emerged as effective nucleophilic coupling partners in palladium-catalyzedcross-coupling reactions with (hetero)aryl halides. These sulfinate reagents are straightforward to prepare, stable to storage and coupling reaction conditions, and deliver efficient reactions, thus offering many advantages, compared to the corresponding boron-derived
POPd/TBAB co-catalyzed Suzuki cross-coupling reaction of heteroaryl chlorides/bromides with 4-fluorophenylboronic acid in water
作者:Ben Li、Zhiqiang Zhang
DOI:10.1007/s13738-015-0775-9
日期:2016.4
free and efficient heterogeneous synthesis for bridging heteroaryl halides and 4-fluorophenylboronic acid was studied in aqueous media according to the Suzuki cross-coupling protocol. High yields of heteroaryl-aryl fluorides were successfully obtained with: chloro-/bromo-substituted pyridine, thiophene, indole, and inzole in neat water using palladium phosphinous acid complexes (POPd)/tetrabutylammonium