Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Ursula Brocksom"'
Publikováno v:
Química Nova, Vol 31, Iss 4, Pp 937-945 (2008)
The bakkenolide group of sesquiterpenes has been a focal point of synthetic efforts amongst several research laboratories all linked to our common origins at the Chemistry Institute at the State University in São Paulo. In this review we would like
Externí odkaz:
https://doaj.org/article/2058cc16d0f04200870f71d812ecb716
Publikováno v:
Molecules, Vol 11, Iss 2, Pp 148-155 (2006)
A series of three para-benzoquinone mono-oximes and four oxy-derivatives were prepared and tested for their antidepressant properties. The (4E) oxime of 2-isopropyl-5- methyl-para-benzoquinone (4) and the corresponding 2-diethylamino-ethyl derivative
Externí odkaz:
https://doaj.org/article/b3338a39e99949c08a20fa317ebf2db9
Publikováno v:
Química Nova, Vol 28, Iss 4, Pp 692-702 (2005)
The olefin metathesis reaction allows the exchange of complex alkyl units between two olefins, with the formation of a new olefinic link and a sub-product olefin usually ethylene. This reaction has found extensive application in the last ten years wi
Externí odkaz:
https://doaj.org/article/9a0bd04c2bfd4d0faa078cb33c4efca1
Publikováno v:
Molecules, Vol 7, Iss 2, Pp 129-134 (2002)
(-)-Carvone (3) has been efficiently transformed into (-)-3β-hydroxycarvone (1), which is expected to be a useful synthon or chiral template in the synthesis of natural molecules. This short and efficient synthesis of compound 1 involves regio
Externí odkaz:
https://doaj.org/article/cc905890907646ac825a0b24c2d6a139
Autor:
Fernanda G. Finelli, Ursula Brocksom, Timothy J. Brocksom, Julio Zukerman-Schpector, Felix N. Delling, Edward R. T. Tiekink
Publikováno v:
Acta Crystallographica Section E, Vol 69, Iss 3, Pp o325-o325 (2013)
In the title compound, C19H30O3Si, both rings adopt a half-boat conformation. Overall, the molecule approximates a U-shape as the cyclo-2-ene-1,4-dione and butyldimethylsilyloxy substituents lie to the same side of the central cyclohexene ring; the m
Externí odkaz:
https://doaj.org/article/afcd218d225245518d9b960db4492433
Publikováno v:
Química Nova v.31 n.4 2008
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova, Volume: 31, Issue: 4, Pages: 937-945, Published: 2008
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova, Volume: 31, Issue: 4, Pages: 937-945, Published: 2008
The bakkenolide group of sesquiterpenes has been a focal point of synthetic efforts amongst several research laboratories all linked to our common origins at the Chemistry Institute at the State University in São Paulo. In this review we would like
Publikováno v:
Zeitschrift für Naturforschung C. 62:563-566
Many essential oils and monoterpenes are used therapeutically as relaxing drugs and tranquilizers. In this study, ten structurally related monoterpene alcohols, present in many essential oils, were evaluated in mice to investigate their pharmacologic
Publikováno v:
Journal of the Brazilian Chemical Society, Volume: 17, Issue: 4, Pages: 792-796, Published: AUG 2006
Journal of the Brazilian Chemical Society v.17 n.4 2006
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society v.17 n.4 2006
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
(R)-(+)-6-isopropenyl-3-methyl-2-cycloheptenone is synthesized from (R)-(-)-carvone by reduction and trialkylsilyl-enolether formation, cyclopropanation with methylene iodide and diethylzinc, followed by a Saegusa type oxidation with ferric chloride
Publikováno v:
Tetrahedron: Asymmetry. 16:3628-3632
Two routes for the synthesis of enantiopure cycloheptenones, intermediates for perhydroazulene terpenoids, have been developed. They feature totally regioselective Tiffeneau–Demjanov and Nozaki ring expansion reactions of ( R )-(−)-carvone.
Autor:
Paulo Roberto Zanotto, Ursula Brocksom, Célia M. Ronconi, Ernesto C. Pereira, Pedro A. P. Nascente
Publikováno v:
Journal of Applied Electrochemistry. 34:1229-1233
This paper describes the study of the preparation of Ti/Ti1-xCexO2 electrodes using the Pechini method and their application for the electroreduction of nitrobenzene in aqueous acid medium. The electrodes were studied using X-ray diffraction, and sca