Enantio-differentiating hydrogenation of methyl acetoacetate over modified Raney nickel catalysts prepared by two-step modifications

被引：1

作者：

Tsutomu Osawa

Kenji Yoshino

Kosuke Takimoto

Osamu Takayasu

Tadao Harada

机构：

[1] University of Toyama,Faculty of Science

[2] Ryukoku University,Faculty of Science and Technology

来源：

Catalysis Letters | 2006年 / 112卷

关键词：

tartaric acid-sodium bromide-modified Raney nickel; modification; pre-modification; two-step modification; enantio-differentiating hydrogenation;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Two-step modifications of the Raney nickel were examined for the enantio-differentiating hydrogenation of methyl acetoacetate. Among the two-step modifications attempted in this study, the combination of ‘pre-modification with disodium tartrate and NaBr in water’ and ‘in-situ modification with tartaric acid’ resulted in the highest optical yield (84%). This modification process is a greener process than the conventional one carried out under weakly acidic conditions, because this process generated almost no Ni2+ ions. The pre-modification with the tartrate and NaBr preferentially eliminated Al3+ from the Raney nickel surface.

引用

页码：167 / 171

页数：4

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