REACTIONS OF CO-2(CO)(8) WITH RC(2)R' ALKYNES .2. SYNTHESIS OF CO-2(CO)(6)(RC(2)R') COMPLEXES - OLIGOMERIZATION OR CYCLOTRIMERIZATION REACTIONS OF SUBSTITUTED ACETYLENES

被引:19
作者
GIORDANO, R
SAPPA, E
PREDIERI, G
机构
[1] UNIV TURIN, DIPARTIMENTO CHIM INORGAN CHIM FIS & CHIM MAT, I-10125 TURIN, ITALY
[2] UNIV PARMA, DIPARTIMENTO CHIM GEN INORGAN CHIM ANAL & CHIM FI, I-43100 PARMA, ITALY
关键词
OLIGOMERIZATION; CYCLOTRIMERIZATION; COBALT COMPLEXES; ALKYNE COMPLEXES;
D O I
10.1016/0020-1693(94)04169-V
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The reactions of Co-2(CO)(8) with asymmetrically substituted alkynes lead to complexes Co-2(CO)(6)(RC(2)R') (1). These catalyze the cyclotrimerization of alkynes to substituted benzenes. Here we report on the synthesis and characterization of some new complexes 1 and on their reactivity with an excess of alkynes in relatively mild conditions; the characterization of new intermediate Co-2(CO)(4)(RC(2)R')(3) flyover derivatives (complexes 2) and the synthesis of some symmetrically and asymmetrically substituted benzenes is reported and commented. In some instances alkyne oligomers instead of cyclotrimers were obtained; the reactions are strongly dependent on the type of catalyst, on the conditions adopted and on the steric and electronic effects of the substituents on the alkynes, as shown also by a comparison of our results with those of analogous reactions on other cobalt and nickel derivatives.
引用
收藏
页码:139 / 146
页数:8
相关论文
共 66 条
[31]   THE X-RAY SINGLE-CRYSTAL AND MOLECULAR-STRUCTURES OF "(CO2(CO)6C2PH(I),CO2ME(II)(292-K)2) AND (CO2(CO)6C2BUT(III)(200-K)2) [J].
GREGSON, D ;
HOWARD, JAK .
ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 1983, 39 (AUG) :1024-1027
[32]   SELECTIVITY IN THE PROPARGYLATION OF POLYFUNCTIONAL AMINES BY (PROPARGYLIUM)-CO2(CO)6+ AND (PROPARGYLIUM)-(C5H5)2MO2(CO)4+ [J].
GRUSELLE, M ;
PHILOMIN, V ;
CHAMINANT, F ;
JAOUEN, G ;
NICHOLAS, KM .
JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1990, 399 (03) :317-326
[33]  
HECK RF, 1968, ORGANIC SYNTHESIS VI, V1, P373
[34]  
Hoogzand C., 1968, ORGANIC SYNTHESIS VI, V1, P343
[35]   METAL-CATALYZED ALKYNE CYCLOTRIMERIZATIONS IN SUPERCRITICAL WATER [J].
JEROME, KS ;
PARSONS, EJ .
ORGANOMETALLICS, 1993, 12 (08) :2991-2993
[36]  
KEMMITT RDW, 1982, COMPREHENSIVE ORGANO, V5, P1
[37]  
KHAND IU, 1971, J CHEM SOC CHEM COMM, P36
[38]   ORGANOCOBALT COMPLEXES .2. REACTION OF ACETYLENEHEXACARBONYLDICOBALT COMPLEXES, (R1C2R2)CO2(CO)6, WITH NORBORNENE AND ITS DERIVATIVES [J].
KHAND, IU ;
KNOX, GR ;
PAUSON, PL ;
WATTS, WE ;
FOREMAN, MI .
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, 1973, (09) :977-981
[39]   ORGANOCOBALT COMPLEXES .1. ARENE COMPLEXES DERIVED FROM DODECACARBONYLTETRACOBALT [J].
KHAND, IU ;
KNOX, GR ;
PAUSON, PL ;
WATTS, WE .
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, 1973, (09) :975-977
[40]   USE OF METAL COMPLEXATION IN THE SYNTHESIS OF MEDIUM-RING ACETYLENIC LACTONES [J].
NAJDI, SD ;
OLMSTEAD, MM ;
SCHORE, NE .
JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1992, 431 (03) :335-358