Titanium tetraisopropoxy

Isopropyl litanate(IV) ((C3H70)4Ti) NSC 60576 Orgalix TA 10 TA 10 Tetraisopropanol-atotitanium Tetraisopropoxide titanium Tetraisopropoxy-titanium Tetraisopropoxytitanium(IV) Ti Isopropylate Tilcom TIPT Titanic acid isopropyl ester Titanium isopropylate Titanium tetraisopropoxide Titanium(4 ) isopropoxide Titanium(IV) isopropoxide TyzorTPt. 

Asymmetric oxidation of ( )-3-phenyl-2-propenyl aryl selenides under Sharpless conditions (tetraisopropoxy titanium/tartrate/ferr-butyl hydroperoxide) afforded optically active alcohols in moderate to high enantiomeric excess (25-92% ee) and with yields of about 40%31b. The enantioselectivity in this reaction was enhanced remarkably by an ortho nitro group in the aryl ring and the use of diisopropyl tartrate ligand in the Sharpless oxidation. 

When the previously cited transition structure 193 is applied to the asymmetric epoxidation of allylic alcohols, it must be modified to include binding of the peroxide, the allylic alcohol, and also the chiral tartrate. The metal in the new model is titanium rather than vanadium, and tetraisopropoxy titanium was found to react with 2 equivalents of diethyl tartrate to form a species such as 212, where OR = 0/-Pr and CO2R = CO2Et.3i7.3i8 The tartrate can bind to titanium from either the bottom or the top face.3i8 The nature of the... 

Tetra-alkoxy titanates are the most commonly used catalysts for PBT pol)mierization [15, 20]. As opposed to the PET process, where a different catalyst is used in each of the two polymerization phases, in the PBT process, a single catalyst is typically used for both reaction steps. The most frequently used titanates are tet-rabutoxy titanate (Ti(OBu) ) [26, 27, 29, 30] and tetraisopropoxy titanate (Ti(OiPr) ) [31]. Ti(OBu), and Ti(OiPr) are very efficient catalysts which do not generate side effects, especially discoloration. Titanium and zirconium alkoxides are sometimes involved in the same preparation [23]. Other compounds have also been also proposed CHgCOONa [28] Ti(OBu), (95%) + CHjCOONa (5%) [29] Ti(OBu), (50%) + Sn(OBu), (50%) [26] Ti(OBu) + Ca(OAc)2 [32] Ti(OBu) + Mg(OAc)2 [30] TiOj-xH O [25], etc. These catalytic... 

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