Bioinspired Catalytic Conjugate Additions of Thiophenols to α,β-Enones by a Disubstituted Benzoate-Bridged Nickel Mimic for the Active Site of Urease
作者:Way-Zen Lee、Huan-Sheng Tseng、Tzu-Li Wang、Hui-Lien Tsai、Ting-Shen Kuo
DOI:10.1021/om100103u
日期:2010.7.12
te (HL), was prepared to synthesize nickel mimics for the active site of urease. Reaction of the deprotonated L− with Ni(ClO4)2·6H2O afforded a dinickelcomplex, [LNi2(CH3CN)(THF)](ClO4)3 (1), characterized by UV/vis spectroscopy and X-ray crystallography. Addition of urea to an acetonitrile solution of 1 afforded a dinickel urea adduct, [LNi2(urea)2](ClO4)3·2CH3CN (2), which was structurally and spectroscopically
A Bioinspired Zn<sup>II</sup>/Fe<sup>III</sup> Heterobimetallic Catalyst for Thia-Michael Addition
作者:Way-Zen Lee、Tzu-Li Wang、Hao-Ching Chang、Yi-Ting Chen、Ting-Shen Kuo
DOI:10.1021/om300275a
日期:2012.6.11
A novel tetranuclear Zn-II/Fe-III heterobimetallic complex was synthesized, and the complex can efficiently catalyze the Michael addition of thiophenols to alpha,beta-unsaturated enones, even for tertiary carbon sulfur bond formation.
Highly Efficient Proline Ester-based Nickel Catalysts for Michael Addition of Thiophenols to α,β-Enones
作者:Way-Zen Lee、Chien-Wei Chiang、Girish M. Kulkarni、Ting-Shen Kuo
DOI:10.1002/jccs.201200386
日期:2013.3
Two N3O2 pentadentate ligands, BMPP and BPPP, were prepared for synthesizing highlyefficient nickel catalysts, [Ni(BMPP)(CH3CN)](ClO4)2 (1) and [Ni(BPPP)(CH3CN)](BPh4)(ClO4) (2), for thia‐Michaeladdition of thiophenols to α,β‐enones. X‐ray structures of 1 and 2 revealed that a labile CH3CN molecule was bound to the nickel center of the catalysts. ESI‐MS spectroscopy indicated that thiolate replaced