Titanium-catalysed oxidation of thianthrene 5-oxide in heterogeneous (zeolites) versus homogeneous media:: electrophilic versus template-mediated oxygen transfer

被引：25
作者：
Adam, W [1 ]
Mitchell, CM [1 ]
Saha-Möller, CR [1 ]
Selvam, T [1 ]
Weichold, O [1 ]
机构：
[1] Univ Wurzburg, Inst Organ Chem, D-97074 Wurzburg, Germany
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2000年 / 154卷 / 1-2期
关键词：
zeolites; titanium; thianthrene; 5-oxide; oxygen transfer; sulfoxide coordination;
D O I：
10.1016/S1381-1169(99)00394-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Large differences in the ratio of sulfide versus sulfoxide oxidation of thianthrene 5-oxide (SSO) have been observed for heterogeneous versus homogeneous Ti-IV catalysts; whereas the Ti-doped zeolites (heterogeneous) oxidise by means of an electrophilic species, sulfoxide coordination (template effect) fos Ti(OiPr)(4) (homogeneous) masks the true electrophilic character of the metal oxidant. (C) 2000 Elsevier Science B.V. All rights reserved.
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收藏
页码：251 / 255
页数：5
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