这项工作涉及合成,光谱研究和催化评价新型手性salen (L 1 H 2)和(L 2 H 2)配体及其手性硼酸酯[ L 1(B 1-4) ]和[ L 2( B 1-4)]配合物。最初,5-叠氮基甲基水杨醛和(R)-(-)-2-氨基-1-丁醇在无水乙醇中的反应提供了新的手性salen配体(L 1 H 2)。然后,一个新的手性salen配体(L 2 H2)已经由手性塞伦配体(L 1 H 2)制备,用于在环境条件下通过点击反应方法合成硼酸酯[ L 2(B 1-4)]络合物。手性Salen(L 1 H 2)和(L 2 H 2)配体与各种硼酸的反应提供了新的四配位单核手性硼酸酯[ L 1(B 1-4) ]和[ L 2(B 1- 4 ]]复合体。所有化合物都是非常稳定的结晶固体,并以良好的收率获得。为了全面表征新合成的手性salen配体及其硼酸酯络合物,已使用了FT-IR,UV-Vis,NMR(1 H,13
这项工作涉及合成,光谱研究和催化评价新型手性salen (L 1 H 2)和(L 2 H 2)配体及其手性硼酸酯[ L 1(B 1-4) ]和[ L 2( B 1-4)]配合物。最初,5-叠氮基甲基水杨醛和(R)-(-)-2-氨基-1-丁醇在无水乙醇中的反应提供了新的手性salen配体(L 1 H 2)。然后,一个新的手性salen配体(L 2 H2)已经由手性塞伦配体(L 1 H 2)制备,用于在环境条件下通过点击反应方法合成硼酸酯[ L 2(B 1-4)]络合物。手性Salen(L 1 H 2)和(L 2 H 2)配体与各种硼酸的反应提供了新的四配位单核手性硼酸酯[ L 1(B 1-4) ]和[ L 2(B 1- 4 ]]复合体。所有化合物都是非常稳定的结晶固体,并以良好的收率获得。为了全面表征新合成的手性salen配体及其硼酸酯络合物,已使用了FT-IR,UV-Vis,NMR(1 H,13
Click‐Connected 2‐(Hydroxyimino)aldehydes for the Design of UV‐Responsive Functional Molecules
作者:Francesca D'Acunzo、Linda Carbonaro、Antonella Dalla Cort、Antonio Di Sabato、Dario Filippini、Francesca Leonelli、Laura Mancini、Patrizia Gentili
DOI:10.1002/ejoc.202001303
日期:2021.1.15
The 2‐(hydroxyimino)aldehyde (HIA) group undergoes Norrish–Yang photoisomerization to ciclobutanol oxime and is under investigation as metal ions ligand. Herein, click chemistry was used as a straightforward procedure to obtain HIA‐based functionalmolecules, the products obtained by UV irradiation with a LED source (λ=365 nm) were characterized and it was shown by UV‐Vis spectrometry that HIAs specifically
Stereoselective Synthesis of δ-Lactones from 5-Oxoalkanals via One-Pot Sequential Acetalization, Tishchenko Reaction, and Lactonization by Cooperative Catalysis of Samarium Ion and Mercaptan
作者:Jue-Liang Hsu、Jim-Min Fang
DOI:10.1021/jo016058t
日期:2001.12.1
sequence of acetalization, Tishchenko reaction and lactonization. The deliberative use of mercaptan, by comparison with alcohol, is advantageous to facilitate the catalytic cycle. The reaction mechanism and stereochemistry are proposed and supported by some experimental evidence. Such samarium ion/mercaptan cocatalyzed reactions show the feature of remote control, which is applicable to the asymmetric synthesis
[EN] SELECTIVE CARBON-CARBON BOND CLEAVAGE BY EARTH ABUNDANT VANADIUM COMPOUNDS UNDER VISIBLE LIGHT PHOTOCATALYSIS<br/>[FR] CLIVAGE SÉLECTIF DES LIAISONS CARBONE-CARBONE PAR DES COMPOSÉS DE VANADIUM ABONDANTS SUR TERRE SOUS L'EFFET D'UNE PHOTOCATALYSE ACTIVÉE PAR UNE LUMIÈRE VISIBLE
申请人:UNIV NANYANG TECH
公开号:WO2016126207A1
公开(公告)日:2016-08-11
Provided herein a vanadium(V) complex of formula I, where R1 to R8 are as defined herein. Also provided herein are reactions making use of the vanadium(V) complex of formula I, such as selective sp3-sp3 carbon-carbon bond cleavage under visible light photocatalysis and photodegradation of lignin.
Hybrid organic—inorganic catalysts: a cooperative effect between support, and palladium and nickel salen complexes on catalytic hydrogenation of imines
A method for immobilizingchiralsalen palladium and nickel complexes (salen = (R,R)-N′,N′-bis-(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediamine) on ordered mesoporoussilica supports (MCM-41), delaminated ITQ-2 and ITQ-6 zeolites, and amorphous silica has been developed. Hydrogenation of imines was studied with the homogeneous as well as with the heterogenized counterpart catalysts. The high
用于固定手性沙仑钯和镍配合物的方法,( -萨伦=(R,R)Ñ ',Ñ ' -双(3,5-二- -叔上的有序中孔二氧化硅载体-butylsalicylidene)-1,2-环己二胺) (MCM-41),分层的ITQ-2和ITQ-6沸石以及无定形二氧化硅已得到开发。亚胺的加氢反应既可以用均相催化剂也可以用杂化的对应催化剂进行研究。载体结构带来的高可及性允许制备TOF为200×10 3 h -1的高效固定化催化剂。载体中适度的酸度通过稳定带电的过渡态而增加了催化活性,并且可以复制均相类似物的活性。重复循环后未观察到催化剂失活。
Synthesis of bifunctional Au–Sn organic–inorganic catalysts for acid-free hydroamination reactions
Gold(III) complexes heterogenized on the surface of a Sn-containing MCM-41 are efficient recyclable catalysts for hydroamination reactions, without requiring any acid promoters.