Feng Fengyi , Zhang Pin , He Youjian 1, Li Yuhong1 , Zhou Meizhen2 , Chen Gang2 and Li Lin2 The Cancer Hospital of the CAMS & PUMC, Beijing 1000211 The Cancer Hospital of Sun Yat Sen University of Medical Science...Feng Fengyi , Zhang Pin , He Youjian 1, Li Yuhong1 , Zhou Meizhen2 , Chen Gang2 and Li Lin2 The Cancer Hospital of the CAMS & PUMC, Beijing 1000211 The Cancer Hospital of Sun Yat Sen University of Medical Sciences, Guangzhou 5100602Beijing Hospital of the Ministry of Health, Beijing 100730展开更多
In the selective hydrogenation of diene (or alkyne) using heterogenized homogeneous catalyst, the high selectivity of monoene formation only appears in a very short time interval. The addition of suitable electron don...In the selective hydrogenation of diene (or alkyne) using heterogenized homogeneous catalyst, the high selectivity of monoene formation only appears in a very short time interval. The addition of suitable electron donors can decrease or even cease the monoene hydrogenation and thereby keep the high monoene selectivity after reaching its maximum.展开更多
In the synthesis of l-phenyl-5-substituted amino-4-pyrazole N-alkyl amide, it was found for the first time that one of the two aromatic amido groups in the molecule of 1-phenyl-5-benzoyl amino-4-pyrazole N-alkyl amide...In the synthesis of l-phenyl-5-substituted amino-4-pyrazole N-alkyl amide, it was found for the first time that one of the two aromatic amido groups in the molecule of 1-phenyl-5-benzoyl amino-4-pyrazole N-alkyl amide was reduced selectively by LiAlH_4. new conclusion was drawn after several experiments have been done that ortho-amino(or substituted amino)aryl amide or the aryl amide with its ortho substituent which can be reduced into an amino group(or substituted amino group)can not be reduced by LiAlH_4. It was further rationalized by quantum chemical calculation.展开更多
InP-based photonics integration is becoming a competi- tive candidate for realizing optical modules with enhanced functionality at a reduced cost, especially in optical com- munication systems, since the proposal of w...InP-based photonics integration is becoming a competi- tive candidate for realizing optical modules with enhanced functionality at a reduced cost, especially in optical com- munication systems, since the proposal of wavelength division multiplexing （WDM）. In recent years, network traffic has raised demands for high capacity, high speed transmission systems.展开更多
文摘Feng Fengyi , Zhang Pin , He Youjian 1, Li Yuhong1 , Zhou Meizhen2 , Chen Gang2 and Li Lin2 The Cancer Hospital of the CAMS & PUMC, Beijing 1000211 The Cancer Hospital of Sun Yat Sen University of Medical Sciences, Guangzhou 5100602Beijing Hospital of the Ministry of Health, Beijing 100730
文摘In the selective hydrogenation of diene (or alkyne) using heterogenized homogeneous catalyst, the high selectivity of monoene formation only appears in a very short time interval. The addition of suitable electron donors can decrease or even cease the monoene hydrogenation and thereby keep the high monoene selectivity after reaching its maximum.
基金Project supported by National Natural Science Foundation of China.
文摘In the synthesis of l-phenyl-5-substituted amino-4-pyrazole N-alkyl amide, it was found for the first time that one of the two aromatic amido groups in the molecule of 1-phenyl-5-benzoyl amino-4-pyrazole N-alkyl amide was reduced selectively by LiAlH_4. new conclusion was drawn after several experiments have been done that ortho-amino(or substituted amino)aryl amide or the aryl amide with its ortho substituent which can be reduced into an amino group(or substituted amino group)can not be reduced by LiAlH_4. It was further rationalized by quantum chemical calculation.
基金supported by the National High-Tech Research and Development Program of China(No.2015AA016902)the National Natural Science Foundation of China(Nos.61635010,61674136,and 61435002)
文摘InP-based photonics integration is becoming a competi- tive candidate for realizing optical modules with enhanced functionality at a reduced cost, especially in optical com- munication systems, since the proposal of wavelength division multiplexing （WDM）. In recent years, network traffic has raised demands for high capacity, high speed transmission systems.
