Sixteen new 1,6-disubstituted fulvenes have been prepared by acylation of cyclopentadienyl sodium and the result of preliminary pharmacological tests showed that several of them have antineoplastic activity.
Herein we report the reactivity of N-(2,4-dicyano-1,5-dimethyl-3-arylcyclopenta-2,4-dienyl)-2,2,2- trifluoroacetamides and N,N-dimethyl-4-nitrosoaniline which provide compounds derived from Ehrlich-Sachs condensation,...Herein we report the reactivity of N-(2,4-dicyano-1,5-dimethyl-3-arylcyclopenta-2,4-dienyl)-2,2,2- trifluoroacetamides and N,N-dimethyl-4-nitrosoaniline which provide compounds derived from Ehrlich-Sachs condensation, dihydrofuran derivatives and fulvene derivatives by adjusting the reaction conditions.展开更多
<正> Exo-cyclic double-bond addition of 6,6-dialkylfulvene and 6,6-polymethylenefulvene withα-pyridylmethyllithium (α-picolinyllithium) results in substituted cyclopentadienyl lithium,which is hy-drolyzed or r...<正> Exo-cyclic double-bond addition of 6,6-dialkylfulvene and 6,6-polymethylenefulvene withα-pyridylmethyllithium (α-picolinyllithium) results in substituted cyclopentadienyl lithium,which is hy-drolyzed or reacted with ferrous chloride to give α-picolinyl dialkylmethyl cyclopentadiene or bis[-α-picolinyldialkylmethyl] ferrocene,respectively,α-Pyridyllithium also affords exo-cyclic double-bond addition with 6,6-pentamethylenefulvene but it abstracts α-hydrogen from 6,6-tetramethylenefulvene.Structure of 1,1’-bis[1- (α-picolylinyl)cyclopentyl] ferrocene has been determined by X-ray diffraction.The parent ferrocene in the three independent molecules (Ⅰ,Ⅱ,Ⅲ) are almost eclipsed,of which accordingto the relative orientation of the substituents of the two cyelopentadienyl rings in a molecule,they show twodifferent conformations.Molecules Ⅰ and Ⅱ are considered to be the same and molecule Ⅲ is of their mirrorimage.展开更多
The substituted cyclopentadienyl-magnesium-chloride, obtained by exocyclic addition of 6,6-dialkylfulvene and allyl-magnesium-chloride, reacted with the ketone 3, the product was hydrolyzed and dehydrated to give the ...The substituted cyclopentadienyl-magnesium-chloride, obtained by exocyclic addition of 6,6-dialkylfulvene and allyl-magnesium-chloride, reacted with the ketone 3, the product was hydrolyzed and dehydrated to give the 2-(1 ,1-dialkyl-3-butenyl)-6,6-dialkyl-fulvene 5. The structure of 5 was determined by using the 1H NMR spectra of 5 and the adducts of 5 with tetracyanoethylene.展开更多
Luminescent materials exhibiting emission switching in the solid state have drawn much attention though there is still no clear design strategy for such materials. In this letter, we reported the crystallization induc...Luminescent materials exhibiting emission switching in the solid state have drawn much attention though there is still no clear design strategy for such materials. In this letter, we reported the crystallization induced emission enhancement (CIEE) of di(4-ethoxyphenyl)dibenzofulvene (1), and achieved switching its emission among four different colors through modulation of its molecular packing patterns. We have investigated its potential application as optical recording materials. The twisted conformations of CIEE compounds afford morphology dependent emission and facilitate tuning their emission through modulation of molecular packing patterns. Thus we provide a possible design strategy for solid stimulus responsive luminescent materials.展开更多
Reaction of a mixture of 1,1-bis(cyclopentadienyl)cyclohexane and pentamethylenefulvene with metallic sodium in THF led to a mixture of cyclohexylidene-bridged bis(cyclopentadienyl)sodium and two-cyclohexylidenebridge...Reaction of a mixture of 1,1-bis(cyclopentadienyl)cyclohexane and pentamethylenefulvene with metallic sodium in THF led to a mixture of cyclohexylidene-bridged bis(cyclopentadienyl)sodium and two-cyclohexylidenebridged tri(cyclopentadienyl)sodium.Reaction of the salt solutions with anhydrous YbCl_(3)in THF afforded a ytterbium complex mixed-ligated by bridged bis(cyclopentadienide)and bridged tri(cyclopentadienide).展开更多
文摘Sixteen new 1,6-disubstituted fulvenes have been prepared by acylation of cyclopentadienyl sodium and the result of preliminary pharmacological tests showed that several of them have antineoplastic activity.
文摘Herein we report the reactivity of N-(2,4-dicyano-1,5-dimethyl-3-arylcyclopenta-2,4-dienyl)-2,2,2- trifluoroacetamides and N,N-dimethyl-4-nitrosoaniline which provide compounds derived from Ehrlich-Sachs condensation, dihydrofuran derivatives and fulvene derivatives by adjusting the reaction conditions.
基金supported by the National Natural Science Foundation of China.
文摘<正> Exo-cyclic double-bond addition of 6,6-dialkylfulvene and 6,6-polymethylenefulvene withα-pyridylmethyllithium (α-picolinyllithium) results in substituted cyclopentadienyl lithium,which is hy-drolyzed or reacted with ferrous chloride to give α-picolinyl dialkylmethyl cyclopentadiene or bis[-α-picolinyldialkylmethyl] ferrocene,respectively,α-Pyridyllithium also affords exo-cyclic double-bond addition with 6,6-pentamethylenefulvene but it abstracts α-hydrogen from 6,6-tetramethylenefulvene.Structure of 1,1’-bis[1- (α-picolylinyl)cyclopentyl] ferrocene has been determined by X-ray diffraction.The parent ferrocene in the three independent molecules (Ⅰ,Ⅱ,Ⅲ) are almost eclipsed,of which accordingto the relative orientation of the substituents of the two cyelopentadienyl rings in a molecule,they show twodifferent conformations.Molecules Ⅰ and Ⅱ are considered to be the same and molecule Ⅲ is of their mirrorimage.
基金Supported by the National Natural Science Foundation of Shandong Province
文摘The substituted cyclopentadienyl-magnesium-chloride, obtained by exocyclic addition of 6,6-dialkylfulvene and allyl-magnesium-chloride, reacted with the ketone 3, the product was hydrolyzed and dehydrated to give the 2-(1 ,1-dialkyl-3-butenyl)-6,6-dialkyl-fulvene 5. The structure of 5 was determined by using the 1H NMR spectra of 5 and the adducts of 5 with tetracyanoethylene.
基金the National Natural Science Foundation of China (51173018)the National Basic Research Program of China (973 program, 2013CB834704)
文摘Luminescent materials exhibiting emission switching in the solid state have drawn much attention though there is still no clear design strategy for such materials. In this letter, we reported the crystallization induced emission enhancement (CIEE) of di(4-ethoxyphenyl)dibenzofulvene (1), and achieved switching its emission among four different colors through modulation of its molecular packing patterns. We have investigated its potential application as optical recording materials. The twisted conformations of CIEE compounds afford morphology dependent emission and facilitate tuning their emission through modulation of molecular packing patterns. Thus we provide a possible design strategy for solid stimulus responsive luminescent materials.
文摘Reaction of a mixture of 1,1-bis(cyclopentadienyl)cyclohexane and pentamethylenefulvene with metallic sodium in THF led to a mixture of cyclohexylidene-bridged bis(cyclopentadienyl)sodium and two-cyclohexylidenebridged tri(cyclopentadienyl)sodium.Reaction of the salt solutions with anhydrous YbCl_(3)in THF afforded a ytterbium complex mixed-ligated by bridged bis(cyclopentadienide)and bridged tri(cyclopentadienide).
