STUDY OF THE REACTIVITY OF CLCO(PPH3)3

被引：25

作者：

RHYOO, HY ^{[1
]}

LEE, BY ^{[1
]}

YU, HKB ^{[1
]}

CHUNG, YK ^{[1
]}

机构：

[1] SEOUL NATL UNIV,DEPT CHEM,SEOUL 151742,SOUTH KOREA

来源：

JOURNAL OF MOLECULAR CATALYSIS | 1994年 / 92卷 / 01期

关键词：

ALKYNES; CARBONYL COMPOUNDS; COBALT; OLIGOMERIZATION; PHOSPHINE COMPLEXES; REDUCTION;

D O I：

10.1016/0304-5102(94)85005-4

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：

The catalytic activity of ClCo(PPh3)3 in oligomerization of alkynes and reduction of carbonyl compounds has been investigated. Monosubstituted alkynes with an electron withdrawing group give quantitative yields of arene derivatives when reacted with 5 mol% of ClCo(PPh3)3. Cyclotrimerization of disubstituted alkynes with at least one electron withdrawing group requires the addition of NaBPh4. In the oligomerization of phenylacetylene, cyclotrimerization and linear dimerization are in competition. However, when the reaction is run in the presence of 1.2 equiv. of NaOMe at room temperature, only linear dimerization is observed. Diethyl allylpropargylmalonate also cyclodimerizes or codimerizes with diphenylacetylene by catalytic amount of ClCo(PPh3)3 in the presence of NaOEt. Reaction of a variety of carbonyl compounds with 5 mol% of ClCo(PPh3)3 in i-propanol leads to the reduction of the compounds to the corresponding alcohols. The reaction requires the addition of NaH which produces (i-PrO)Na in situ. The role of alkoxides or NaBPh4 in ClCo(PPh3)3 catalyzed oligomerization of alkynes or reduction of carbonyl compounds is discussed.

引用

页码：41 / 49

页数：9

共 20 条

[1] REACTIONS OF DISUBSTITUTED ALKYNES WITH BROMOTRIS(TRIMETHYLPHOSPHINE)COBALT(I) - SYNTHESIS AND MOLECULAR AND CRYSTAL-STRUCTURES OF [CO(ETA-2-PHC=CC5H11)(PME3)3]BPH4 AND [CO(SIGMA-2-(CO2ME)4C4)(MECN)2(PME3)2]BPH4 [J].