Showing papers by "Henri Rudler published in 1999"
TL;DR: In this article, a methyl mono-oxo rhenium(V) complex with two picolinato chelating ligands has been synthesized and structurally characterized, and when reacted with excess 10 or 30% H2O2 it forms peroxo species responsible for the catalytic activity of a highly selective two-phase medium.
Abstract: A methyl mono-oxo rhenium(V) complex with two picolinato chelating ligands has been synthesized and structurally characterized. When reacted with excess 10 or 30% H2O2 it forms peroxo species responsible for the catalytic activity of a highly selective two-phase medium.
31 citations
TL;DR: Bis(trimethylsily)ketene acetals of the general structure 2 (R1 = H, Me, R2 = Me, Et, Pri, CMe=CH2) react at −78 °C in the presence of ButOK with a series of arenechromium tricarbonyl complexes as mentioned in this paper.
18 citations
13 citations
TL;DR: Aminocarbene complexes of chromium 1b-d react successively with diphenylacetylene, XH (X = PhS, PhSe, OAc) and finally with pyridine to give a series of functionalized pyrrolinones via N-ylide complexes.
10 citations
TL;DR: N-methylpyridinium ylide complexes obtained from alkoxy carbene complexes of chromium and N-methyldihydropyridines easily insert successively a CO ligand to give α-alkoxy chromium acyl complexes, then a tethered triple bond and two additional CO groups to yield bicyclic butenolides as discussed by the authors.
10 citations
TL;DR: Bis(trimethylsily)ketene acetals of the general structure 2 (R1 = H, Me, R2 = Me, Et, Pri, CMe=CH2) react at −78 °C in the presence of ButOK with a series of arenechromium tricarbonyl complexes as discussed by the authors.
Abstract: Bis(trimethylsily)ketene acetals of the general structure 2 (R1 = H, Me, R2 = Me, Et, Pri, CMe=CH2) react at –78 °C in the presence of ButOK with a series of arenechromium tricarbonyl complexes 3 to give as expected, after oxidation with I2 followed by silica gel chromatography, arylcarboxylic acids 7. In the case of anisolechromium tricarbonyl 8, besides the m-methoxyarylcarboxylic acids, tetrahydrobenzofuran-2,5-diones 11, are formed as the result of a double nucleophilic addition.
TL;DR: N-methylpyridinium ylide complexes obtained from alkoxy carbene complexes of chromium and N-methyldihydropyridines easily insert successively a CO ligand to give α-alkoxy chromium acyl complexes, then a tethered triple bond and two additional CO groups to yield bicyclic butenolides as discussed by the authors.
Abstract: N-methylpyridinium ylide complexes obtained from alkoxycarbene complexes of chromium and N-methyldihydropyridines easily insert successively a CO ligand to give α-alkoxy chromium acyl complexes, then a tethered triple bond and two additional CO groups to yield bicyclic butenolides.
TL;DR: In this paper, aldehydes react with hydrogen peroxide at −50 °C in the presence of catalytic amounts of methyltrioxorhenium (MTO) to give in high yield the corresponding nitriles and N-methylene-N-methyl Noxide.
Abstract: N,N-Dimethylhydrazones of aldehydes react with hydrogen peroxide at –50 °C in the presence of catalytic amounts of methyltrioxorhenium (MTO) to give in high yield the corresponding nitriles and N-methylene-N-methyl N-oxide.