Cu(I)-Catalyzed Synthesis of Dihydropyrimidin-4-ones toward the Preparation of β- and β<sup>3</sup>-Amino Acid Analogues
作者:Basker Rajagopal、Ying-Yu Chen、Chun-Chi Chen、Xuan-Yu Liu、Huei-Ren Wang、Po-Chiao Lin
DOI:10.1021/jo402670d
日期:2014.2.7
A copper(I)-catalyzed synthesis of substituted dihydropyrimidin-4-ones from propargyl amides via the formation of ketenimine intermediate has been successfully developed; the synthesis afforded good isolated yields (80–95%). The mild reaction conditions at room temperature allow the reaction to proceed to completion in a few hours without altering the stereochemistry. Further, by involving a variety
[EN] EXPANDED THERAPEUTIC POTENTIAL IN NITROHETEROARYL ANTIMICROBIALS<br/>[FR] POTENTIEL THÉRAPEUTIQUE ÉTENDU DANS DES ANTIMICROBIENS À NITROHÉTÉROARYLE
申请人:UNIV CALIFORNIA
公开号:WO2014205414A1
公开(公告)日:2014-12-24
Disclosed herein are antimicrobial compounds compositions, pharmaceutical compositions, the use and preparation thereof. Some embodiments relate to imidazole, thiazole, and furan derivatives and their use as therapeutic agents.
Click and Pick: Identification of Sialoside Analogues for Siglec-Based Cell Targeting
作者:Cory D. Rillahan、Erik Schwartz、Ryan McBride、Valery V. Fokin、James C. Paulson
DOI:10.1002/anie.201205831
日期:2012.10.29
Click ‘n’ chips: Azide and alkyne‐bearing sialic acids (purple diamond; see picture) were subjected to high‐throughput click chemistry to generate a library of sialic acid analogues. Microarray printing of the library and screening with the siglec family of sialic‐acid‐binding proteins, led to the identification of high‐affinity ligands for siglec‐9 and siglec‐10.
A palladium-catalyzed process to construct oxazoles and oxazolines with broad functional-group tolerance has been developed, and the method introduces difluoromethyl groups into heterocycles in a one-pot fashion. This system uses a carbonyl oxygen as the acceptor for the addition of a vinylpalladium intermediate to achieve the cyclization. Oxazoline derivatives are generated as the Z-isomer with high
Cyclization of Propargylic Amides: Mild Access to Oxazole Derivatives
作者:Jan P. Weyrauch、A. Stephen K. Hashmi、Andreas Schuster、Tobias Hengst、Stefanie Schetter、Anna Littmann、Matthias Rudolph、Melissa Hamzic、Jorge Visus、Frank Rominger、Wolfgang Frey、Jan W. Bats
DOI:10.1002/chem.200902472
日期:2010.1.18
the oxazole synthesis were developed and chelate ligands can be obtained. The use of Barluenga’s reagent offers a new and mild access to the synthetically valuable iodoalkylideneoxazoles from propargylicamides, this reagent being superior to other sources of halogens.