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Synthesis of (Het)aryl 2-(2-hydroxyaryl)cyclopropyl Ketones
A simple general method for the synthesis of 1-acyl-2-(ortho-hydroxyaryl)cyclopropanes, which belong to the donor-acceptor cyclopropane family, has been developed. This method, based on the Corey-Chaykovsky cyclopropanation...
Organic chemistry
- 2020 •
- Jimp •
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Jimp - Článek v periodiku v databázi Web of Science
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Synthesis of substituted 6-cyclopropylpurine bases and nucleosides by cross-coupling reactions or cyclopropanations
Two approaches to the title cyclopropylpurines were developed. The first one consisted in cross-couplings of halopurines with cyclopropylzinc chloride, while the second one of cyclopropanations of vinylpurines with diazoacetate....
CC - Organická chemie
- 2008 •
- Jx
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Synthesis of New Chiral 2,2'-bipyridine ligands and their application in copper-catalyzed asymmetric allylic oxidation and cyclopropanation.
A series of isoprenoid derived bipyridine-type ligands has been synthesized via a de novo construction of the pyridine nucleus. When these novel ligands are used in copper catalyzed allylic oxidation of cyclic olefins and cyclopropanation in...
CC - Organická chemie
- 2003 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Enantioselective Cyclopropanation of 4-Nitroisoxazole Derivatives
The present study reports an asymmetric organocatalytic cascade reaction of 4-nitroisoxazole derivative with alpha,beta-unsaturated aldehydes catalysed by chiral secondary amine. Using this approach, 1,2,3-trisubstituted cyclopropane product...
Organic chemistry
- 2020 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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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-dibromoketone...
Organic chemistry
- 2020 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Identification of unusual cyclopropane monounsaturated fat ty acids from the deep-water lake invertebrate Acanthogammarus grewingkii.
Annotation not available...
EE - Mikrobiologie, virologie
- 1994 •
- Jx
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
A MRCC study of the isomerisation of cyclopropane
Mukherjee's and Brillouin-Wigner multi-reference coupled clustermethods with universal state selective (USS) corrections were used to study the isomerisation of cyclopropane to propene through a trimethylene/propylidene diradicals. Main aim....
Physical chemistry
- 2017 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Cyclopropanation reactions catalysed by dendrimers possessing one metalloporphyrin active site at the core: linear and sigmoidal kinetic behaviour for different dendrimer generations
Experimental and computational studies on dendrimers possessing a Fe(porphyrin) catalytic core and polyether dendritic arms show that these macromolecules promote efficiently the (2+1) cycloaddition between a model alkene and diazomethane. The reacti...
CC - Organická chemie
- 2016 •
- Jx •
- Link
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Stereoselective cyclopropanation of boron dipyrromethene (BODIPY) derivatives by an organocascade reaction
cyclopropanes were produced in isolated yields 66–98%, and with diastereomeric ratios 3/2...
Physical chemistry
- 2022 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Reactions of activated lupane oxo-compounds with diazomethane: an approach to new derivatives of cytotoxic triterpenes
Seventeen new compounds containing dihydropyrazole, oxirane, cyclopropane or 3-methoxycyclohex-2-en-1-one rings on the triterpenic skeleton were synthetized....
CC - Organická chemie
- 2006 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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