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Lewis Base-Catalyzed Enantioselective Allylation of alpha,beta-Unsaturated Aldehydes.
Catalytic allylation of alpha,beta-unsaturated aldehydes with allyltrichlorosilane in the presence of chiral 3,3'-unsymmetrically substituted bis(tetra-hydroisoquinoline) N,N-dioxides was explored....
CC - Organická chemie
- 2010 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Highly Enantioselective Aza-Baylis-Hillman-Type Reaction of alpha,beta-Unsaturated Aldehydes with In Situ Generated N-Boc- and N-Cbz-Imines
An organocatalytic highly enantioselective aza-Baylis-Hillman reaction of alpha,beta-unsaturated aldehydes with in situ generated N-Boc- and N-Cbz-imines is presented. This novel process opens the pathway for the synthesis ...
CC - Organická chemie
- 2009 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
1,4-Addition of tetraethyl fluoromethylenebisphosphonate to alpha, beta-unsaturated compounds
Tetraethyl fluoromethylenebisphosphonate in the presence of cesium carbonate in DMF undergoes efficient 1,4-addition to Michael acceptors having terminal double bond such as alpha,beta-unsaturated ketones, esters, sulfones,...
CC - Organická chemie
- 2011 •
- Jx •
- Link
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Conjugate addition of diethyl 1-fluoro-1-phenylsulfonylmethanephosphonate to alpha,beta-unsaturated compounds
Diethyl 1-fluoro-1-phenylsulfonylmethanephosphate (1) in the presence of cesium carbonate undergoes efficient 1,4-addition to Michael acceptors having terminal double bonds such as alpha,beta-unsaturated ketones, esters, su...
CC - Organická chemie
- 2013 •
- Jx •
- Link
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Asymmetric Aza-Morita-Baylis-Hillman-type reactions: The highly enantioselective reaction between unmodified alpha,beta-unsaturated aldehydes and N-acyl imines by organo-co-catalysis
The organo-co-catalytic aza-Morita-Baylis-Hillman (MBH)-type reaction between N-carbamate protected imines and alpha,beta-unsaturated aldehydes has been developed. The organic co-catalytic system of proline and DABCO enable...
CC - Organická chemie
- 2011 •
- Jx •
- Link
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Diastereoselective Cyclopropanation through Michael Addition-Initiated Ring Closure between alpha,alpha-Dibromoketones and alpha,beta-Unsaturated Fischer Carbene Complexes
The diastereoselective synthesis of tetrasubstituted cyclopropanes is described. The two-step procedure is based on the 3-exo-tet Michael addition-initiated ring closure. In the first step, the enolates derived from alpha,alpha-dibr...
Organic chemistry
- 2020 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
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Polyfunctional beta-Dicarbonyl Compounds by Michael Addition Reactions of Ester Enolates to alpha-Benzylidene and alpha-Alkylidene-beta-dicarbonyl Compounds
to a-benzylidene and a-alkylidene beta-dicarbonyl compounds was studied. Most substrates functionalities reacted directly in the beta-position, whereas aldol and Michael addition competed with unsaturated ketones. The dias...
CC - Organická chemie
- 2012 •
- Jx •
- Link
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Highly Enantioselective Addition of 1-Fluoro-1-nitro(phenylsulfonyl)methane to alpha,beta-Unsaturated Aldehydes
An organocatalytic, highly enantioselective addition of 1- fluoro-1-nitro(phenylsulfonyl)methane to alfa,beta-unsaturated aldehydes is reported. The reaction is simply catalyzed by secondary amines and furnishes the corresponding fl...
CC - Organická chemie
- 2010 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Sterically crowded heterocycles. IX. New alpha,beta-unsaturated ketones containing imidazo[1,2-a]quinoline, imidazo[1,2-a]isoquinoline, benzo[h]imidazo[1,2-a]-1,10-phenanthroline moieties
CC - Organická chemie
- 1997 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Highly enantioselective organocatalytic alpha-selenylation of aldehydes using hypervalent iodine compounds
for the preparation of biologically active building blocks such as beta-hydroxy alcohols, alpha-amino acids, and alpha-hydroxy esters.The highly enantioselective organocatalytic alpha-selenylation reaction. This t...
CC - Organická chemie
- 2013 •
- Jx •
- Link
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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