نتایج جستجو برای: fluorinated enones

تعداد نتایج: 4816  

Journal: :Chemical communications 2005
Baolu Shi Michael F Greaney

The Michael addition of thiols to enones is reported as a new method for dynamic combinatorial library synthesis.

Journal: :Chemical communications 2009
Sohei Omura Takahide Fukuyama Yuji Murakami Hiromi Okamoto Ilhyong Ryu

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.

Journal: :Chemical communications 2005
Alexandre Alexakis Victoria Albrow Kallolmay Biswas Magali d'Augustin Oscar Prieto Simon Woodward

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.

Journal: :Angewandte Chemie 2011
Xinqiang Fang Xingkuan Chen Hui Lv Yonggui Robin Chi

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...

Journal: :Physical chemistry chemical physics : PCCP 2015
Huabing Shu Yunhai Li Shudong Wang Jinlan Wang

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/...

Journal: :Organic & biomolecular chemistry 2012
Luke Hunter Sharon Butler Steven B Ludbrook

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...

Journal: :Tetrahedron 2021

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.

Journal: :Organic & biomolecular chemistry 2012
Chunhua Luo Yu Jin Da-Ming Du

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).

Journal: :Chemical communications 2010
Yinhua Huang Sumod A Pullarkat Yongxin Li Pak-Hing Leung

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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