@article{4a47cc3ae9df4c9d836d3c36b034174e,
title = "Bis-zirconium and bis-hafnium catalysts for the strong activation of carbonyl substrates",
abstract = "(3,3'-Di-t-butyl-5,5'-dimethylbenzophenone-2,2'- dioxy)bis(triisopropoxyzirconium) and its hafnium derivative can be successfully utilized in organic synthesis as bimetallic Lewis acid catalysts. The high activation ability of such catalysts toward carbonyls is emphasized using several synthetic examples including the asymmetric allylation in comparison with the corresponding mono-Zr as well as bis-Ti catalysts. (C) 2000 Elsevier Science Ltd.",
keywords = "Aldol reactions, Allylation, Asymmetric reactions, Zirconium and compounds",
author = "Hideo Hanawa and Satoshi Kii and Naoki Asao and Keiji Maruoka",
note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research on Priority Areas (No. 706: Dynamic Control of Stereochemistry) from the Ministry of Education, Science, Sports and Culture, Japan.",
year = "2000",
month = jul,
day = "15",
doi = "10.1016/S0040-4039(00)00827-3",
language = "English",
volume = "41",
pages = "5543--5546",
journal = "Tetrahedron Letters",
issn = "0040-4039",
publisher = "Elsevier Limited",
number = "29",
}