Organocatalytic cycloaddition of carbonyl sulfide with propargylic alcohols to 1,3-oxathiolan-2-ones
作者:Hui Zhou、Rui Zhang、Hui Zhang、Sen Mu、Xiao-Bing Lu
DOI:10.1039/c9cy00062c
日期:——
adducts of a Lewis base (LB) were synthesized and first used to catalyze the cycloaddition of COS with propargylic alcohols under mild reaction conditions, selectively providing the functionalized 1,3-oxathiolane-2-ones with complete (Z) configuration selectivity. Among them, COS adducts of highly polarized olefins proved to be highly efficientorganocatalysts for this transformation, with excellent yields
Anchoringgroups are extremely important in controlling the performance of dye‐sensitized solarcells (DSCs). The design and characterization of sensitizers with new anchoringgroups, in particular non‐carboxylic acid groups, has become a recent focus of DSC research. Herein, new donorπacceptor zincporphyrin dyes with a pyridinering as an anchoringgroup have been designed and synthesized for applications
锚固基团对于控制染料敏化太阳能电池(DSC)的性能极为重要。具有新的锚定基团,特别是非羧酸基团的敏化剂的设计和表征,已成为DSC研究的重点。在此,新的供体 π 受体锌卟啉染料与吡啶环作为锚固基团已经被设计和用于在DSC的应用合成。光物理和电化学研究表明,吡啶环可有效用作卟啉敏化剂的锚定基团。基于这些新卟啉的DSC在充满阳光的条件下(AM 1.5G,100 mW cm -2)表现出约4.0%的总功率转换效率。
Hydrazine Hydrate Accelerates Neocuproine–Copper Complex Generation and Utilization in Alkyne Reduction, a Significant Supplement Method for Catalytic Hydrogenation
作者:Yongsheng Zhang、Jincheng Wang、Zhenjiao Yang、Zeng Zhang、Xiaoyan He、Guoliang Chen、Gang Huang、Xiuhong Lu
DOI:10.1021/acs.joc.1c01803
日期:2021.12.17
Diimine (HN═NH) is a strong reducingagent, but the efficiency of diimine oxidized from hydrazine hydrate or its derivatives is still not good enough. Herein, we report an in situ neocuproine–copper complex formation method. The redox potential of this complex enable it can serve as an ideal redox catalyst in the synthesis of diimine by oxidation of hydrazine hydrate, and we successfully applied this
Rational Syntheses of Cyclic Hexameric Porphyrin Arrays for Studies of Self-Assembling Light-Harvesting Systems
作者:Lianhe Yu、Jonathan S. Lindsey
DOI:10.1021/jo010742q
日期:2001.11.1
achieved by reaction of a porphyrin pentamer + porphyrin monomer or the joining of two porphyrin trimers. In the presence of a tripyridyl template, the yields of the 5 + 1 and 3 + 3 reactions ranged from 10 to 13%. The 5 + 1 reaction in the absence of the template proceeded in 3.5% yield, thereby establishing the structure-directed contribution to cyclic hexamer formation. The 3 + 3 route relied on successive
Isolable CO<sub>2</sub>
Adducts of Polarized Alkenes: High Thermal Stability and Catalytic Activity for CO<sub>2</sub>
Chemical Transformation
作者:Hui Zhou、Rui Zhang、Xiao-Bing Lu
DOI:10.1002/adsc.201801194
日期:2019.1.22
analysis revealed the bent geometry of the binding CO2 having an O−C−O angle of 127.50∼129.51° for THPE−CO2 adducts. In situ FTIR experiments demonstrated that THPE−CO2 adducts had unprecedented thermalstability in DMSO, even at 100 °C without decomposition. It was found that the THPE−CO2 adducts were highly active in catalyzing the carboxylative cyclization of CO2 with propargylic alcohols under mild