Homogeneous isomerization of 1-butene catalyzed by [MX2(PR3)2]-NaBH4 systems (M=Co, Ni, X=halides, SCN, PR3=PPhnEt3-n) - Acceleration by phosphine addition and stereoselectivity.
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概要
- 論文の詳細を見る
The stoichiometric or a little excess amount of NaBH<SUB>4</SUB> was treated with [MX<SUB>2</SUB>(PR<SUB>3</SUB>)<SUB>2</SUB>] (M=Co, Ni, X= halides, SCN, PR<SUB>3</SUB>=PPh<I><SUB>n</SUB></I>Et<SUB>3−<I>n</I></SUB>) in THF–1,2-dimethoxyethane to form monohydride species which were active for isomerization of 1-butene. The reaction was accelerated by excess PPh<SUB>3</SUB> in [CoX<SUB>2</SUB>(PPh<SUB>3</SUB>)<SUB>2</SUB>]–NaBH<SUB>4</SUB> systems. Other catalytic systems have optimum ratios of excess phosphine to metal for getting maximum activities. Thiocyanate–metal complexes are the most active in each Co– and Ni–catalyst system. Cisselectivity depends on the cone angle of PR<SUB>3</SUB>, the size of anion ligands, and the congested structure of complexes.
- 公益社団法人 日本化学会の論文
著者
-
SAKAKI Shigeyoshi
Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
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Kanai Hiroyoshi
Department Of Cardiovascular Medicine Gunma University Graduate School Of Medicine
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Sakatani Takenobu
Department of Hydrocarbon Chemistry, Faculty of Engineering, Kyoto University
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