Simultaneous coordination and double activation phenomena of carbonyl and epoxy oxygens by bis-titanium reagent as a bidentate Lewis acid catalyst

被引：31

作者：

Asao, N ^{[1
]}

Kii, S ^{[1
]}

Hanawa, H ^{[1
]}

Maruoka, K ^{[1
]}

机构：

[1] Hokkaido Univ, Grad Sch Sci, Dept Chem, Sapporo, Hokkaido 0600810, Japan

来源：

TETRAHEDRON LETTERS | 1998年 / 39卷 / 22期

关键词：

D O I：

10.1016/S0040-4039(98)00571-1

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The new bidentate Ti catalyst, (anthraquinone-1,8-dioxy)bis(triisopropoxy- titanium) (1) can be successfully designed and utilized for the simultaneous coordination to carbonyl substrates. The high double-activation ability of the bidentate Ti catalyst I toward carbonyls is emphasized using several synthetic examples in comparison with the corresponding monodentate Ti catalyst. The intermediary coordination complex formation of bidentate 1 with DMF or epoxycyclohexane as a carbonyl or epoxy substrate is characterized by C-13 NMR spectroscopy. (C) 1998 Elsevier Science Ltd. Ail rights reserved.

引用

页码：3729 / 3732

页数：4

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