Catalyst development for organocatalytic hydrosilylation of aromatic ketones and ketimines
作者:Andrei V. Malkov、Angus J. P. Stewart-Liddon、Grant D. McGeoch、Pedro Ramírez-López、Pavel Kočovský
DOI:10.1039/c2ob25472g
日期:——
A new family of Lewis basic 2-pyridyl oxazolines have been developed, which can act as efficientorganocatalysts for the enantioselective reduction of prochiral aromatic ketones and ketimines with trichlorosilane, a readilyavailable and inexpensive reagent. 1-Isoquinolyl oxazoline, derived from mandelic acid, was identified as the most efficient catalyst of the series, capable of delivering high
Iron-Catalyzed Arylation of Heterocycles via Directed C–H Bond Activation
作者:John J. Sirois、Riley Davis、Brenton DeBoef
DOI:10.1021/ol403634b
日期:2014.2.7
The iron-catalyzedarylation of aromatic heterocycles, such as pyridines, thiophenes, and furans, has been achieved. The use of an imine directing group allowed for the ortho functionalization of these heterocycles with complete conversion in 15 min at 0 °C. Yields up to 88% were observed in the synthesis of 15 heterocyclic biaryls.
Staudinger Reaction of Schiff Bases of Acetylthiophene and Acetylpyridine with Ketenes. Diastereoselective Synthesis of 4-Heterosubstituted β-Lactams and their Conversion to β-Thiolactams
作者:Małgorzata Krasodomska、Paweł Serda
DOI:10.1007/s00706-007-0588-3
日期:2007.3
Arylimines of 2-acetylthiophene and 2-, 3-, and 4-acetylpyridines react with ketenes yielding 4-heterosubstituted beta-lactams. Reactions of imines with ketenes were proved to be diastereoselective. The stereochemistry of the products was confirmed by X-ray analysis. beta-Lactams treated with Lawesson's reagent gave beta-thiolactams.