Regio‐ and Enantioselective Ni‐Catalyzed Formal Hydroalkylation, Hydrobenzylation, and Hydropropargylation of Acrylamides to α‐Tertiary Amides
作者:Lou Shi、Ling‐Ling Xing、Wen‐Bo Hu、Wei Shu
DOI:10.1002/anie.202011339
日期:2021.1.18
The development of enantioselective alkyl–alkyl cross‐couplings with coinstantaneous formation of a stereogeniccenter without the use of sensitive organometallic species is attractive yet challenging. Herein, we report the intermolecular regio‐ and enantioselective formal hydrofunctionalizations of acrylamides, forging a stereogeniccenter α‐position to the newly formed Csp3–Csp3 bond for the first
Galantamine (GAL) is a well-known acetylcholinesterase (AChE) inhibitor, and it is widely used for treatment of Alzheimer’s disease. GAL fits well in the catalytic site of AChE, but it is too short to block the peripheral anionic site (PAS) of the enzyme, where the amyloid beta (Aβ) peptide binds and initiates the Aβ aggregation. Here, we describe a docking-based technique for designing of GAL derivatives with dual-site binding fragments – one blocking the catalytic site and another blocking the PAS. The highly scored compounds are synthesized and tested. Protocols for docking, design, synthesis, and AChE inhibitory test are given.
Efficient Synthesis of Modular Amino Acid Derivatives Containing Selenium with Pronounced GPx-Like Activity
作者:Eduardo E. Alberto、Letiére C. Soares、Jéssie H. Sudati、Antonio C. A. Borges、João B. T. Rocha、Antonio L. Braga
DOI:10.1002/ejoc.200900485
日期:2009.9
New chiral selenide- and diselenide aminoacidderivatives have been synthesized. By a simple and efficient two-step route, these new compounds were obtained from inexpensive and commercially available L-amino acids. The products, with a highly modular character, were obtained in good to excellent yields. Selected examples were also efficiently used as GPx mimics, catalyzing the reduction of H2O2 to
aggregation of amyloid‐β peptide via the peripheral anionic site (PAS). Using docking‐based predictions, in the present study we design 20 novel galantamine derivatives with alkylamide spacers of different length ending with aromatic fragments. The galantamine moiety blocks the catalytic site, while the terminal aromatic fragments bind in PAS. The best predicted compounds are synthesized and tested for