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Merck

Titanium and zirconium benzofuranoxides. Crystal structures and catalytic properties.

Dalton transactions (Cambridge, England : 2003) (2008-04-30)
Katarzyna Krauzy-Dziedzic, Jolanta Ejfler, Sławomir Szafert, Piotr Sobota
RESUMEN

Reactions of Ti(OiPr)4 or Zr(OEt)4 with 4 equivalents of 2,3-dihydro-2,2-dimethyl-7-benzofuranol (ddbfoH) in toluene gave neutral complexes that in the solid state are dimers of [Ti(micro-ddbfo)2(ddbfo)6] and [Zr(ddbfo)3(EtOH)(micro-EtO)]2 composition. The former could also be conveniently synthesized in a direct reaction of TiCl4 with ddbfoH. This air-stable aryloxo compound was found to initiate living ring-opening polymerization of lactides affording polyesters with narrow molecular weight distribution. It also catalyzed addition of terminal acetylenes to aryl aldehydes.

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Sigma-Aldrich
2,3-Dihydro-2,2-dimethyl-7-benzofuranol, 99%