Synthesis of β-oxo carbonyl and thiocarbonyl compounds via basic sulfur abstraction
作者:Saúl Silva、Christopher D. Maycock
DOI:10.1016/j.tet.2019.130552
日期:2019.10
suitable thioesters represents a mild method for the formation of carbon-carbon bonds and the formation of 1,3-dicarbonyl compounds. A study of the scope and limitations of this reaction for the synthesis of these or mixed 1,3-carbonyl/thiocarbonyl compounds by a base promoted sulfur abstraction rearrangement is described. These reactions were typically very clean and the products were obtained in good
An iridium/f-amphol catalytic system for the enantioselective hydrogenation of α-substituted β-ketoesters via dynamic kinetic resolution is reported. The desired anti products were obtained in high yields (up to 98%) with good diastereoselectivity (up to 96:4 diastereometic ratio (dr)) and excellent enantioselectivity (up to >99% enantiomeric excess (ee)). A catalytic model is proposed to explain the
Design, Synthesis, Structure, and Dehydrogenation Reactivity of a Water-Soluble <i>o</i>-Iodoxybenzoic Acid Derivative Bearing a Trimethylammonium Group
作者:Li-Qian Cui、Zhi-Lei Dong、Kai Liu、Chi Zhang
DOI:10.1021/ol202777h
日期:2011.12.16
5-Trimethylammonio-1,3-dioxo-1,3-dihydro-1λ5-benzo[d][1,2]iodoxol-1-ol anion (AIBX 1a), an o-iodoxybenzoic acid (IBX) derivative having the trimethylammonium moiety on its phenyl ring, possesses very good solubility in water and distinct oxidative properties from IBX, which is demonstrated in the oxidation of various β-keto esters to the corresponding dehydrogenated products using water as cosolvent
Dye-sensitized photooxidation of enolictautomers of naphthalenones (5) gave hydroperoxynaphthalenones (6) and naphthols (7). Deoxygenation of 6 by triphenylphosphine gave hydroxynaphthalenones (8).