Bp. Santora et al., Methods for the synthesis of the Diels-Alder catalysts (ArO)(2)TiX2 (X = Cl, Br, I; Ar=2-tert-butyl-6-methylphenyl), ORGANOMETAL, 18(13), 1999, pp. 2557-2560
A procedure for converting titanium diethylamidos to the corresponding diha
lides (Cl, Br, I) and a complementary method for converting titanium dichlo
rides into dibromides and diiodides are reported These methods were utilize
d to synthesize a family of homogeneous and polymer-supported Diels-Alder c
atalysts with the general formula (ArO)(2)TiX2 (X = Cl, Br, I; Ar =2-tert-b
utyl-6-methylphenyl).