A Transition-Metal-Catalyzed Enediyne Cycloaromatization
摘要:
The pentamethylcyclopentadienyl iron cation, generated from [(eta5-C5Me5)Fe(NCMe)3]PF6, triggers the room temperature cycloaromatization of acyclic and alicyclic enediynes, in the presence of either 1,4-cyclohexadiene or terpinene as the hydrogen-atom donor, to give metal-arene products in good to excellent yields. Photolysis of the metal-arene complexes liberates the arene from the metal in excellent yield. The first demonstration of a transition-metal-catalyzed cycloaromatization of conjugated enediynes has been achieved under photochemical conditions utilizing either [(eta5-C5Me5)Fe(NCMe)3]PF6 or [(eta5-C5Me5)Fe(eta6-1,2-(Prn)2C6H4)]PF6 as the catalyst precursor. The use of a metal and light has led to a convenient method for cycloaromatization of a trans-enediyne.
Reduction of Molybdenum(V) Chloride with Various Reducing Metals: Reactivity Correlations with the Descendant Lewis Acids
作者:Ryuichiro Hara、Qiaoxia Guo、Tamotsu Takahashi
DOI:10.1246/cl.2000.140
日期:2000.2
Reactivity of low-valent molybdenum prepared from MoCl5 with various reducing metals in DME, was dependent on the reducing metals in the order of Al > Sn, In > Zn, Mg, Li in the case of cyclotrimerization of alkynes. This order is parallel to the acidity of the descendant Lewis acids.
来自MoCl5与各种还原金属在DME中制备的低价钼的反应性,依赖于还原金属,对于炔烃的环三聚化反应,其顺序为:Al > Sn, In > Zn, Mg, Li。这个顺序与后续路易斯酸的酸性相对应。
The Jacobsen Reaction. IX.<sup>1</sup> 6,7-Dialkyltetralins
作者:Lee Irvin Smith、Chien-Pen Lo
DOI:10.1021/ja01186a065
日期:1948.6
A Transition-Metal-Catalyzed Enediyne Cycloaromatization
作者:Joseph M. O'Connor、Seth J. Friese、Betsy L. Rodgers
DOI:10.1021/ja050060a
日期:2005.11.30
The pentamethylcyclopentadienyl iron cation, generated from [(eta5-C5Me5)Fe(NCMe)3]PF6, triggers the room temperature cycloaromatization of acyclic and alicyclic enediynes, in the presence of either 1,4-cyclohexadiene or terpinene as the hydrogen-atom donor, to give metal-arene products in good to excellent yields. Photolysis of the metal-arene complexes liberates the arene from the metal in excellent yield. The first demonstration of a transition-metal-catalyzed cycloaromatization of conjugated enediynes has been achieved under photochemical conditions utilizing either [(eta5-C5Me5)Fe(NCMe)3]PF6 or [(eta5-C5Me5)Fe(eta6-1,2-(Prn)2C6H4)]PF6 as the catalyst precursor. The use of a metal and light has led to a convenient method for cycloaromatization of a trans-enediyne.