Abstract:The reactions between phenylmagnesium bromide or benzylmagnesium chloride and titanium tetrachloride have been studied. The influence of the introduction order of the reagents is mentioned. Decomposition of the (non‐isolated) compounds RnTiX4‐n is shown to be essentially intermolecular, and rarely intramolecular.
“…Dans une communication prkliminaire [ 3 ] , nous avons montrC que l'action de I1 (&tone, cr-didtone, 0: ou y-cCto-ester, aldChyde) sur 111, en prPsence d'un alcoxyde de titane I, permet l'obtention (aprPs hydrolyse acide de l'intermkdiaire gCn6ralement non is016 IVl)) de p-hydroxyesters V, souvent avec d'excellents rendements. Le schCma suivant peut &tre envisagC : [9][10][11][12][13][14][15][16]19). I1 semble donc que le nombre de groupes alcoxydes participant B la rCaction soit au maximum de trois (n 5 3 dans IV).…”
Section: Summary a New Synthesis Of P-hydroxyesters Involving A Reacunclassified
“…Dans une communication prkliminaire [ 3 ] , nous avons montrC que l'action de I1 (&tone, cr-didtone, 0: ou y-cCto-ester, aldChyde) sur 111, en prPsence d'un alcoxyde de titane I, permet l'obtention (aprPs hydrolyse acide de l'intermkdiaire gCn6ralement non is016 IVl)) de p-hydroxyesters V, souvent avec d'excellents rendements. Le schCma suivant peut &tre envisagC : [9][10][11][12][13][14][15][16]19). I1 semble donc que le nombre de groupes alcoxydes participant B la rCaction soit au maximum de trois (n 5 3 dans IV).…”
Section: Summary a New Synthesis Of P-hydroxyesters Involving A Reacunclassified
The preparation of some complexes of titanium tetrachloride with pyridine and substituted pyridines is described. The IR. spectra of the complexes compared with those of the pure ligands (L) indicate the presence of L→Ti dative bonds in the complexes.
The reaction between RMgX and TiCl4,2L (L = pyridine, piperidine or quinoleine) is shown to give a high yield of organo‐titanium (IV) compounds. As expected, the decomposition of the latter is reduced to a minimum by the ligand L initially present, allowing the preparation of etheral solutions of R4Ti (R = benzyl, phenyl or butyl). R4Ti is obtained whatever may be the initial molar ratio of RMgX/TiCl4, 2L.
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