نتایج جستجو برای: fluorinated enones
تعداد نتایج: 4816 فیلتر نتایج به سال:
The Michael addition of thiols to enones is reported as a new method for dynamic combinatorial library synthesis.
Lactonization of dialdehydes and keto aldehydes was effectively catalyzed by RuHCl(CO)(PPh(3))(3). A cascade lactonization sequence accompanied by cross-coupling with enones was also attained.
Simple phosphoramidite ligands afford good to excellent levels of enantioselectivity in 1,4-additions of AlR3 species to enones; sequential carboalumination-ACA cascades are possible.
Organocatalytic activation of readily available substrates has led to the rapid development of many enantioselective reactions in the last decade. In N-heterocyclic carbene (NHC) catalysis, reactions of enals with enones or enone derivatives have been extensively investigated and are reported to undergo a diverse set of transformations based on the catalytically generated enolate and homoenolat...
Using density functional theory, the G0W0 method and Bethe-Salpeter equation calculations, we systematically explore the structural, electronic and optical properties of hydrogenated and fluorinated germanene. The hydrogenated/fluorinated germanene tends to form chair and zigzag-line configurations and its electronic and optical properties show close geometry dependence. The chair hydrogenated/...
Backbone-fluorinated amino acids exhibit unique conformational behaviour, and have potential utility as components of bioactive shape-controlled peptides. However, methods for the elaboration of backbone-fluorinated amino acids have thus far been limited to solution phase peptide coupling reactions. In this paper, protocols are developed that allow the successful manipulation of backbone-fluori...
A detailed study has been completed on the asymmetric transfer hydrogenation (ATH) of a series enones using Ru(II) catalysts. Electron-rich rings adjacent to CO group reduce level reduction compared CC. The ATH reaction can readily discriminate between double and triple bonds ketones, reducing bond but leaving intact in major product.
A chiral sulfonamide primary amine-organocatalysed, highly enantioselective Michael addition of malonates to enones has been developed. This reaction afforded the corresponding products in excellent yields (up to 99%) and excellent enantioselectivity (up to 99% ee).
Chiral tertiary phosphines were synthesized by asymmetric hydrophosphination of aromatic enones catalyzed by an organopalladium complex with high yields and stereoselectivity. The procedure offers practical access to chiral tertiary phosphines.
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