Anaerobic Nitroxide-Catalyzed Oxidation of Alcohols Using the NO<sup>+</sup>/NO· Redox Pair
作者:Martin Holan、Ullrich Jahn
DOI:10.1021/ol403016p
日期:2014.1.3
A newmethod for alcoholoxidationusing TEMPO or AZADO in conjunction with BF3·OEt2 or LiBF4 as precatalysts and tert-butyl nitrite as a stoichiometric oxidant has been developed. The system is based on a NO+/NO· pair for nitroxide reoxidation under anaerobic conditions. This allows the simple, high-yielding conversion of various achiral and chiral alcohols to carbonyl compounds without epimerization
Palladium-Catalyzed Additions of Terminal Alkynes to Acceptor Alkynes
作者:Barry M. Trost、Mark T. Sorum、Chuen Chan、Gerd Rühter
DOI:10.1021/ja9624937
日期:1997.1.1
The development of addition reactions wherein the product is the simple sum of the reactants plus anything else (only needed catalytically) constitutes an important goal for enhanced synthetic efficiency. The C−H bond of terminalalkynes (the donor alkynes) can be added to either terminalalkynes (self-coupling) or activated internal alkynes (cross-coupling) (the acceptor alkynes) in the presence of
Carbohydrates as efficient catalysts for the hydration of α-amino nitriles
作者:Sampada Chitale、Joshua S. Derasp、Bashir Hussain、Kashif Tanveer、André M. Beauchemin
DOI:10.1039/c6cc07530d
日期:——
Directed hydration of alpha-amino nitriles was achieved under mild conditions using simple carbohydrates as catalysts exploiting temporary intramolecularity. A broadly applicable procedure using both formaldehyde and NaOH as catalysts efficiently hydrated a variety of primary and secondary susbtrates, and allowed the hydration of enantiopure substrates to proceed without racemization. This work also
Labeling and Natural Post-Translational Modification of Peptides and Proteins via Chemoselective Pd-Catalyzed Prenylation of Cysteine
作者:Thomas Schlatzer、Julia Kriegesmann、Hilmar Schröder、Melanie Trobe、Christian Lembacher-Fadum、Simone Santner、Alexander V. Kravchuk、Christian F. W. Becker、Rolf Breinbauer
DOI:10.1021/jacs.9b08279
日期:2019.9.18
The prenylation of peptides and proteins is an important post-translational modification observed in vivo. We report that the Pd-catalyzed Tsuji–Trost allylation with a Pd/BIPHEPHOS catalyst system allows the allylation of Cys-containing peptides and proteins with complete chemoselectivity and high n/i regioselectivity. In contrast to recently established methods, which use non-native connections,
[EN] OXAZOLIDINONE HYDROXAMIC ACID COMPOUNDS FOR THE TREATMENT OF BACTERIAL INFECTIONS<br/>[FR] COMPOSÉS D'ACIDE OXAZOLIDINONE-HYDROXAMIQUE POUR LE TRAITEMENT D'INFECTIONS BACTÉRIENNES
申请人:NOVARTIS AG
公开号:WO2015066413A1
公开(公告)日:2015-05-07
This invention pertains generally to treating bacterial infections using organic compounds of Formula I. In certain aspects, the invention pertains to treating infections caused by Gram-negative bacteria. (I) wherein X, Y, R1, R2, R3, R4 and R5 and defined herein.