132284-84-5Relevant articles and documents
Divergent Synthesis of Dihydropyranone Stereoisomers via N-Heterocyclic Carbene Catalysis
Zhao, Changgui,Wang, Jian
supporting information, p. 1668 - 1672 (2019/02/19)
We recently developed a novel chiral N-heterocyclic carbene (NHC) catalyzed dynamic kinetic enantioselective acylation (DKEA) and dynamic kinetic diastereoselective acylation (DKDA) of Achmatowicz rearrangement products to generate useful intermediates for the further synthesis of carbohydrates. In this update, we describe a divergent NHC catalytic strategy for the stereoselective preparation of all four isomers starting from a common racemic precursor. The present report provides easy access to diverse optically pure dihydropyranones. (Figure presented.).
Efficient 1,2-addition of aryl- and alkenylboronic acids to aldehydes catalyzed by the palladium/thioether-imidazolinium chloride system
Kuriyama, Masami,Shimazawa, Rumiko,Shirai, Ryuichi
, p. 1597 - 1600 (2008/09/17)
(Chemical Equation Presented) The high level of catalyst performance was attainable in the palladium-catalyzed 1,2-addition of aryl-, heteroaryl-, and alkenylboronic acids to aromatic, heteroaromatic, and aliphatic aldehydes using thioether-imidazolinium chloride L5 as a heterobidentate carbene ligand precursor.
