Solvent-controlled direct radical oxyphosphorylation of styrenes mediated by Manganese(III)
作者:Guo-Yu Zhang、Cheng-Kun Li、Da-Peng Li、Run-Sheng Zeng、Adedamola Shoberu、Jian-Ping Zou
DOI:10.1016/j.tet.2016.04.013
日期:2016.6
Direct radical oxyphosphorylation of styrenes with diarylphosphine oxides and dialkylphosphites mediated by Mn(OAc)3 is described. The solvent played a key role in this selective difunctionalization reaction.
Visible Light-Mediated Photocatalytic Metal-Free Cross-Coupling Reaction of Alkenyl Carboxylic Acids with Diarylphosphine Oxides Leading to β-Ketophosphine Oxides
作者:Hai-Feng Qian、Cheng-Kun Li、Zhi-Hao Zhou、Ze-Kun Tao、Adedamola Shoberu、Jian-Ping Zou
DOI:10.1021/acs.orglett.8b02639
日期:2018.9.21
A new visible light-mediated photocatalytic decarboxylative oxyphosphorylation of cinnamicacids with diarylphosphine oxides is described. This reaction is performed under mild conditions to afford the corresponding β-ketophosphine oxides.
Copper-catalyzed direct oxyphosphorylation of alkynes with H-phosphine oxides and dioxygen: A convenient approach to <font>β</font>-ketophosphine oxides
and facile copper-catalyzed synthesis of β-ketophosphine oxides via direct oxyphosphorylation of alkynes with H-phosphine oxides and dioxygen has been developed under mild conditions without any base or cocatalyst. A radical reaction pathway for the formation of β-ketophosphine oxides is proposed. An 18O labeling experiment suggested that the carbonyl oxygen atom of β-ketophosphine oxides originated
Preparations of N- and P-substituted acetylenes under metal-free conditions
作者:Hong Chen、Qingjuan Zheng、Wanrong Dong、Zhihong Peng、Delie An
DOI:10.1080/00397911.2016.1198812
日期:2016.9.1
ABSTRACT An efficient strategy towards triazole- or phosphine-oxide-substituted alkynes with the assistance of strong base LiHMDS is described. The facile and practical reaction took place from easily prepared substrates in a one-pot manner without participation of any transition metal catalysts or ligands, exhibiting good functional groups tolerance (up to 37 examples) and high efficiency (up to 90%
The invention relates to new calixarenes according to the formula:
wherein:
R1 is an alkyl or aryl group, or a hydrogen atom,
R2 and R3, which may be identical or different, are alkyl or aryl groups,
n is an integer ranging from 2 to 8, and
p is an integer ranging from 4 to 8.
Said calixarenes may be used to extract actinides and lanthanides from aqueous solutions.