Alkyne Competition in the Benzannulation Reaction with Chromium Carbene Complexes
作者:Chunrui Wu、Dmytro O. Berbasov、William D. Wulff
DOI:10.1021/jo100433k
日期:2010.7.2
The benzannulation reaction of Fischer carbenecomplexes is investigated under conditions where the reaction of the carbenecomplex is occurring in the presence of two different alkynes. A series of competition experiments are examined where the effects of various structural factors are explored by pitting 10 different carbenecomplexes with 11 different alkynes. Terminal alkynes will react selectively
The development of an organotransition metal synthesis of quinones
作者:Lenny S. Liebeskind、Sherrol L. Baysdon、Michael S. South、Suresh Iyer、James P. Leeds
DOI:10.1016/s0040-4020(01)91423-1
日期:1985.1
A new and very general synthesis of quinones is described from conception to the current state of maturity. The chemistry relies on a convergent joining of a transition metalcomplex and an alkyne to provide benzoquinones (from maleoylmetal complexes) and naphthoquinones (from phthaloylmetal complexes). Significant aspects of this chemistry are its generality (terminal, internal, electron rich, and
Convergent, high-yield, regioselective synthesis of substituted benzoquinones from maleoylcobalt complexes and alkynes
作者:Lanny S. Liebeskind、James P. Leeds、Sherrol L. Baysdon、Suresh Iyer
DOI:10.1021/ja00333a075
日期:1984.10
LIEBESKIND, L. S.;LEEDS, J. P.;BAYSDON, S. L., J. AMER. CHEM. SOC., 1984, 106, N 21, 6451-6453
作者:LIEBESKIND, L. S.、LEEDS, J. P.、BAYSDON, S. L.
DOI:——
日期:——
The chemistry of η5-CpCo(CO)(maleoyl) and η5-CpCo(CO)(phthaloyl) complexes
作者:Lanny S. Liebeskind、Charles F. Jewell
DOI:10.1016/0022-328x(85)87376-9
日期:1985.4
Insertion of η5-CpCo(CO)2 into dimethylcyclobutenedione and benzocyclobutenedione gave high yields of η5-CpCo(CO)(dimethylmaleoyl) and η5-CpCo(CO)(phthaloyl); respectively. Replacement of the carbonmonoxide ligand in these complexes with thermally labile ligands (CH3CN, PhCN, C5H5N, (C2H5)2S) allowed a facile reaction with alkynes to occur. The maleoyl cobalt complex gave very high yields of stable
的η插入5 -CpCo(CO)2成dimethylcyclobutenedione和benzocyclobutenedione给出的η高收率5 -CpCo(CO)(dimethylmaleoyl)和η 5 -CpCo(CO)(邻苯二甲酰基); 分别。用热不稳定的配体(CH 3 CN,PhCN,C 5 H 5 N,(C 2 H 5)2 S)取代这些配合物中的一氧化碳配体可以轻松地与炔烃反应。所述马来酰钴络合物,得到稳定的非常高的产率η 5,其裂解以游离醌治疗用铈(IV)-CpCo(醌)络合物。邻苯二甲酰钴络合物反应形成不稳定的η5- CpCo(萘醌)配合物和游离萘醌。