P,O-Phosphinophenolate zinc(ii) species: synthesis, structure and use in the ring-opening polymerization (ROP) of lactide, ε-caprolactone and trimethylene carbonate
Synthesis, structural characterization, and olefin polymerization behavior of vanadium(III) complexes bearing bidentate phenoxy‐phosphine ligands
作者:Sen‐Wang Zhang、Ling‐Pan Lu、Bai‐Xiang Li、Yue‐Sheng Li
DOI:10.1002/pola.26292
日期:2012.11.15
equiv of the ligand in THF in the presence of excess TEA afforded vanadium(III) complexesbearing two phenoxy‐phosphineligands (3c–f). These complexes were characterized by FTIR and mass spectrum as well as elemental analyses. Structures of 2f and 3c were further confirmed by X‐ray crystallographic analyses. Complexes 2a–g and 3c–f were employed as the catalysts for ethylene polymerization under various
钒(III)络合物轴承苯氧基膦配体(2A-G )(2-R 1 -4-R 2 -6-PPH 2 -C 6 H ^ 2 O)的VCl 2(THF)2(2A,R 1 = R 2 = H; 2b:R 1 = F,R 2 = H; 2c:R 1 = Ph,R 2 = H; 2d:R 1 = t Bu,R 2 = H; 2e:R 1 = R 2 = Me ; 2楼:R 1= R 2=t Bu;通过在过量的三乙胺(TEA)存在下用1.0当量的配体在四氢呋喃(THF)中处理,由VCl 3(THF)3制备2g:R 1= R 2= CMe 2 Ph )。在过量TEA存在下,VCl 3(THF)3与2.0当量的配体在THF中反应,得到带有两个苯氧基膦配体的钒(III)配合物(3c–f)。这些复合物的特征在于FTIR和质谱以及元素分析。2f和3c的结构X射线晶体学分析进一步证实了这一点。配合物2a–g和3c–f被
P,O-Phosphinophenolate zinc(<scp>ii</scp>) species: synthesis, structure and use in the ring-opening polymerization (ROP) of lactide, ε-caprolactone and trimethylene carbonate
作者:Christophe Fliedel、Vitor Rosa、Filipa M. Alves、Ana. M. Martins、Teresa Avilés、Samuel Dagorne
DOI:10.1039/c5dt00458f
日期:——
Structurally diverse phosphinophenolate Zn(ii) heteroleptic and homoleptic compounds are reported, some of which efficiently mediate the controlled ROP of lactide, ε-caprolactone and trimethylene carbonate under living and immortal conditions.
remains considerable research to be carried out on the catalyticasymmetric synthesis of these axially chiral molecules. In this instance, we disclose an N-heterocycliccarbene (NHC)-catalyzed synthesis of axially chiral diaryl ethers via atroposelective esterification of dialdehyde-containing diaryl ethers. NHC desymmetrization produces axially chiral diaryl ether atropisomers with high yields and enantioselectivities