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Приказ резултата 121-130 од 218
Free radical ring expansion and subsequent reactions of intermediary carbon radicals
(Serbian Chemical Society, 1996)
Alkyl radicals, derived from ethyl 1-(bromoalkyl)-2-oxocyclo-alkanecarboxylates or from the corresponding thiohydroxamic esters, undergo a ring expansion reaction and subsequent intermoleculaar addition/elimination reactions. ...
Semisynthesis of Taxol (R): an improved procedure far the isolation of 10-deacetylbaccatin III
(Serbian Chemical Soc, Belgrade, 1999)
From the needles of domestic yew, (Taxus baccata), 10-deacetylbaccatin III (10-DAB) call be isolated in quantities of up to 297 mg per kg of fresh needles. Additional quantities of 10-DAB call be obtained from the extract ...
Formation of allenes by reaction of 1,4-dibromobut-2-ene with dialkyl ketones and base
(Royal Society of Chemistry, 1991)
By reaction of 1,4-dibromo-(E)-but-2-ene with dialkyl ketones and sodium hydride the allenic ketones 3 were obtained as the main products, in addition to the symmetrical unsaturated 1,8-diketones 4.
Synthesis of several substituted phenylpiperazines behaving as mixed D2/5HT(1A) ligands
(Blackwell Publishing Ltd, 1997)
Twenty-two different compounds have been synthesized with the aim of creating new, mixed D2/5HT(1A) ligands. For this purpose l-substituted phenylpiperazines attached by the N-4 nitrogen to dopaminergic pharmacophores of ...
New substituted 2-methylthiomethyl- and 2-methylsulphinylmethylenebenz- imidazoles with D 2 /5-HT(1A) activity
(Govi-Verlag Pharmazeutischer Verlag GmbH, 1998)
Several 2-methylthiomethylbenzimidazoles (3a-e) and the corresponding sulphinyl derivatives 4a-e were synthesized and evaluated measuring their in vitro binding affinity at the D 1 and D 2 dopamine (source: synaptosomal ...
Synthesis and dopaminergic features of six novel 3-arylpiperidines
(Bollettino Chimico Farmaceutico, 1998)
Four substituted 3-aryl-1-{2-[5-(1H-benzimidazole)]ethyl}piperidines and two 3-aryl-1-{2-[6-(1,4-dihydroxyquinoxaline-2,3-dione)]ethyl} piperidines were synthesized, characterized and evaluated for in vitro binding affinity ...
Photochemically induced mercuric oxide - iodine oxidation of some unsaturated steroid compounds
(Pergamon, 1994)
Photochemically induced HgO/I2 oxidation of cholest-5-en-3α-ol (6) and cholest-5-en-3β-ol (7) afforded (Scheme 3) products arising from the corresponding alkoxy radicals (12, 13 and 14a,b) and from attack of the I2O ...
Novel 5-[2-(N,N-di-n-propylamino)-ethyl]benzimidazole-derived high affinity dopaminergic ligands
(Govi-Verlag Pharmazeutischer Verlag GmbH, 1996)
Derivatives of a noncatechol dopamine (DA) bioisostere 5-[2-(N,N-di-n-propylamino)ethyl]-benzimidazole (15) were synthesized and checked for affinity towards D-1 and D-2 DA receptors (DAR). Ten compounds were obtained by ...
Functionalized oligopolysiloxanes by heterogeneously catalyzed equilibration polymerization reactions
(Springer, 1995)
A new general procedure for preparation of functionalized oligopolysiloxanes of predetermined molecular weight is described. It utilizes heterogeneously catalyzed siloxane equilibration polymerization reactions which do ...
Degradative side reactions in the syntheses of exactly alternating silarylene-siloxane polymers
(Springer, 1992)
Four principal synthetic methods for preparation of exactly alternating silarylene-siloxane polymers: the chlorosilane, the acetoxysilane, the aminosilane and the ureidosilane polymerization reactions, were compared under ...