A clean and efficient method for the synthesis of bis（indolyl）alkanes with antimony trichloride（SbCl3） as the catalyst under solvent-free grinding conditions is described. This method provides several advantages, ...A clean and efficient method for the synthesis of bis（indolyl）alkanes with antimony trichloride（SbCl3） as the catalyst under solvent-free grinding conditions is described. This method provides several advantages, such as simple work-up procedure, neutral conditions and high yields.展开更多
Solvent effect on the conformations of-bis(4-nitrophenoxy)-alkanes w th different chain Lengths(Nn)was studied by UV spectra.In poor solvents such as EG-H_2O and THF-H_2O,with the water content higher than 50%,the K-b...Solvent effect on the conformations of-bis(4-nitrophenoxy)-alkanes w th different chain Lengths(Nn)was studied by UV spectra.In poor solvents such as EG-H_2O and THF-H_2O,with the water content higher than 50%,the K-bands of N_4. N,N_6 and N_(10)in the UV absorption spectra shifted to longer wavelengths as compared wth 4-nitrophenoxyethane(N_0).It is suggested that in poor solvents the two aromatic gr(?)ps are close to each other in parallel,forming ground state complexes.The K- bead of N_4 showed a blue shift from that of N_0 when the water content was around 5%,probably attributable to a conformation with the nitro group of one benzene ring sit(?)ing on the plane of the other benzene ring.展开更多
The hydrothermal reactions of Cd（OAc）2·2H2O with 1,2,4,5-benzenetetracarboxylic acid（H4bta） and 1,4-bis（thiabendazolyl）butane（L1） or 1,6-bis（thiabendazolyl）hexane（L2） afforded two coordination polymer...The hydrothermal reactions of Cd（OAc）2·2H2O with 1,2,4,5-benzenetetracarboxylic acid（H4bta） and 1,4-bis（thiabendazolyl）butane（L1） or 1,6-bis（thiabendazolyl）hexane（L2） afforded two coordination polymers [Cd2（L1）（bta）·2H2O]n（1） and [Cd2（L2）2（H2bta）2]n（2）. Complex 1 holds a rare 3D binodal（4,6）-connected framework with fsh topology. Complex 2 features an infinite meandering chain structure, which is further extended via O–H···O hydrogen bonding into a 3D supramolecular network. The thermal and fluorescence proprieties of the two complexes were investigated.展开更多
Diacetates 1 and N-[(1-benzotriazol-l-yl)alkyl]amides 2, both masked forms of aldehydes, could undergo deprotection and condensation with cycloalkanones in a one-pot procedure promoted by samarium(III) iodide (SmI3) ...Diacetates 1 and N-[(1-benzotriazol-l-yl)alkyl]amides 2, both masked forms of aldehydes, could undergo deprotection and condensation with cycloalkanones in a one-pot procedure promoted by samarium(III) iodide (SmI3) to afford α,α'-bis(substituted benzylidene) cycloalkanones in good yields.展开更多
A series of 2,2＇-dialkyl bis（3-methyl-6,7-dihydrobenzofuran-4（5H）-one） derivatives was prepared through H2SO4·SiO2 catalyzed condensation reaction under solvent-free conditions as potential anti-tumor agents...A series of 2,2＇-dialkyl bis（3-methyl-6,7-dihydrobenzofuran-4（5H）-one） derivatives was prepared through H2SO4·SiO2 catalyzed condensation reaction under solvent-free conditions as potential anti-tumor agents. All of them were characterized by ESI-MS, IR and NMR spectra. Meanwhile, the single crystal of the target compound （4b）, C24H28O4, was also obtained and determined by X-ray crystallography. Crystal data： triclinic system, space group P , a = 8.463（10）, b = 9.612（11）, c = 13.828（15） , α = 74.29（5）, β = 80.93（5）, γ = 69.90（3）°, V = 1014（2） 3, Z = 2, F（000） = 408, Dc = 1.246 g/cm3, μ = 0.084 mm？1, R = 0.0883 and wR = 0.2440 for 4616 independent reflections （Rint = 0.1200） and 3490 observed ones （I 〉 2σ（I））.展开更多
An efficient synthetic method for bis（indol-3-yl）alkane derivatives has been developed.In the presence of 5 mol%of pyridinium tribromide（PTB）,the condensation of indoles and aldehydes proceeded smoothly under mild...An efficient synthetic method for bis（indol-3-yl）alkane derivatives has been developed.In the presence of 5 mol%of pyridinium tribromide（PTB）,the condensation of indoles and aldehydes proceeded smoothly under mild conditions,giving rise to the corresponding bis（indol-3-yl）alkanes in good to excellent yields.展开更多
基金Supported by the Natural Science Foundation of Shandong Province,China(No.Y2008B33)
文摘A clean and efficient method for the synthesis of bis（indolyl）alkanes with antimony trichloride（SbCl3） as the catalyst under solvent-free grinding conditions is described. This method provides several advantages, such as simple work-up procedure, neutral conditions and high yields.
文摘Solvent effect on the conformations of-bis(4-nitrophenoxy)-alkanes w th different chain Lengths(Nn)was studied by UV spectra.In poor solvents such as EG-H_2O and THF-H_2O,with the water content higher than 50%,the K-bands of N_4. N,N_6 and N_(10)in the UV absorption spectra shifted to longer wavelengths as compared wth 4-nitrophenoxyethane(N_0).It is suggested that in poor solvents the two aromatic gr(?)ps are close to each other in parallel,forming ground state complexes.The K- bead of N_4 showed a blue shift from that of N_0 when the water content was around 5%,probably attributable to a conformation with the nitro group of one benzene ring sit(?)ing on the plane of the other benzene ring.
基金Project supported by the Natural Science Foundation-steel and Iron Foundation of Hebei Province(B2015209299 and E2016209304)
文摘The hydrothermal reactions of Cd（OAc）2·2H2O with 1,2,4,5-benzenetetracarboxylic acid（H4bta） and 1,4-bis（thiabendazolyl）butane（L1） or 1,6-bis（thiabendazolyl）hexane（L2） afforded two coordination polymers [Cd2（L1）（bta）·2H2O]n（1） and [Cd2（L2）2（H2bta）2]n（2）. Complex 1 holds a rare 3D binodal（4,6）-connected framework with fsh topology. Complex 2 features an infinite meandering chain structure, which is further extended via O–H···O hydrogen bonding into a 3D supramolecular network. The thermal and fluorescence proprieties of the two complexes were investigated.
文摘Diacetates 1 and N-[(1-benzotriazol-l-yl)alkyl]amides 2, both masked forms of aldehydes, could undergo deprotection and condensation with cycloalkanones in a one-pot procedure promoted by samarium(III) iodide (SmI3) to afford α,α'-bis(substituted benzylidene) cycloalkanones in good yields.
基金supported by the National Natural Science Foundation of China(No.21602123)China Scholarship Council(No.201508420062)Youth Talent Development Foundation of China Three Gorges University
文摘A series of 2,2＇-dialkyl bis（3-methyl-6,7-dihydrobenzofuran-4（5H）-one） derivatives was prepared through H2SO4·SiO2 catalyzed condensation reaction under solvent-free conditions as potential anti-tumor agents. All of them were characterized by ESI-MS, IR and NMR spectra. Meanwhile, the single crystal of the target compound （4b）, C24H28O4, was also obtained and determined by X-ray crystallography. Crystal data： triclinic system, space group P , a = 8.463（10）, b = 9.612（11）, c = 13.828（15） , α = 74.29（5）, β = 80.93（5）, γ = 69.90（3）°, V = 1014（2） 3, Z = 2, F（000） = 408, Dc = 1.246 g/cm3, μ = 0.084 mm？1, R = 0.0883 and wR = 0.2440 for 4616 independent reflections （Rint = 0.1200） and 3490 observed ones （I 〉 2σ（I））.
基金the National Natural Science Foundation of China(Nos.20862009 and 20962010)the National Natural Science Foundation of Jiangxi Province(No.2008GQH0026)the Science Foundation of Education Department of Jiangxi Province(No.GJJ10386) for their financial support
文摘An efficient synthetic method for bis（indol-3-yl）alkane derivatives has been developed.In the presence of 5 mol%of pyridinium tribromide（PTB）,the condensation of indoles and aldehydes proceeded smoothly under mild conditions,giving rise to the corresponding bis（indol-3-yl）alkanes in good to excellent yields.
基金The project was supported by National Key R&D Plan (2020YFA0210900)National Natural Science Foundation of China (21991090, 21991092,22272195, U22A20431)Youth Innovation Promotion Association of Chinese Academy of Sciences (2021172)。
