Searching for the ideal triazole: Investigating the 1,5-triazole as a charge neutral DNA backbone mimic
摘要:
A novel triazole linkage that mimics the phosphodiester backbone in DNA was designed, synthesised and evaluated. Unlike previous work which utilised copper to form a 1,4 triazole linkage in the DNA backbone, a ruthenium catalyst was used to yield a 1,5 triazole. The artificial linkage was incorporated into a DNA backbone via a phosphoramidite building block using solid phase synthesis. The biophysical properties of DNA with a 1,5 triazole linkage in the backbone were evaluated by UV melting and circular dichroism and compared to DNA modified with previously reported 1,4 triazole linkages of various lengths. (C) 2020 Elsevier Ltd. All rights reserved.
Transition metal alkynyl complexes by transmetallation from Au(CCAr)(PPh<sub>3</sub>) (Ar = C<sub>6</sub>H<sub>5</sub>or C<sub>6</sub>H<sub>4</sub>Me-4)
作者:Wan M. Khairul、Mark A. Fox、Natasha N. Zaitseva、Maryka Gaudio、Dmitry S. Yufit、Brian W. Skelton、Allan H. White、Judith A. K. Howard、Michael I. Bruce、Paul J. Low
DOI:10.1039/b809960j
日期:——
Facile acetylide transferreactions take place between gold(I) complexes Au(CCAr)(PPh3) (Ar = C6H5 or C6H4Me-4) and a variety of representative inorganic and organometallic complexes MXLn (M = metal, X = halide, Ln = supporting ligands) featuring metals from groups 8–11, to afford the corresponding metal–alkynyl complexes M(CCR)Ln in modest to good yield. Reaction products have been characterised by
金(I)配合物Au(C CAr)(PPh 3)(Ar = C 6 H 5或C 6 H 4 Me-4)与各种代表性的无机和有机金属配合物MXL n(M =金属,X =卤化物,L n =支持配体)以8-11族金属为特征,以中等到良好的收率得到相应的金属-炔基络合物M(CCR)L n。反应产物已通过分光光度法进行了表征,并报道了Fe(C CC 6 H 4 Me-4)(dppe)Cp,Ru(C CC 6 H 4 Me-4)(dppe)Cp *,Ru的分子结构测定(C CC 6 ˚F 5)(η 2 -O 2)(PPH 3)的Cp *,IR(C CC 6 H ^ 4 ME-4)(η 2 -O 2)(CO)(PPH 3)2,镍( CCC 6 H 4 Me-4)(PPh 3)Cp和反式-Pt(C CAr)2 L 2(Ar = C 6 H 5,L = PPh 3 ; Ar = C 6 H 4 Me-4,L =
Dihydrogen complexes of ruthenium. 2. Kinetic and thermodynamic considerations affecting product distribution
作者:Mitchell S. Chinn、D. Michael Heinekey
DOI:10.1021/ja00169a026
日期:1990.6
Cationic ruthenium dihydrogen complexes of the form ((eta}-Csub5}Hsub5})Ru(L)(Lprime})(eta}sup 2}-Hsub2}))BFsub4} (L = CO, Lprime} = PCysub 3} (1a), PPhsub 3} (2a), PMesub2}Ph (3a), PMesub 3} (4a) have been prepared by protonation of the corresponding neutral hydrides. Carbonyl free derivatives such as ((eta}-Csub5}Hsub5})Ru(P Pprime})(eta}sup 2}-Hsub2}))BFsub4} (P Pprime}
Reactivity of ruthenium polyhydrides: reactions of RuH6[P(C6H11)3]2 with C5-cyclic hydrocarbons. Preparation of new ruthenium(IV) trihydrides RuH3(C5Me5)L [L = PMe3, PPh3, PPri 3, or P(C6H11)3]
作者:Th�r�se Arliguie、Bruno Chaudret
DOI:10.1039/c39860000985
日期:——
RuH2(C5H6)(Pcy3)2(2) and RuH(C5H5)(Pcy3)2(3)(cy = cyclohexyl) are formed in the reaction of RuH6(Pcy3)2(1) with cyclopentene, although in the presence of 3,3-dimethylbut-1-ene only (3) is formed quantitatively, but treatment of (1) with C5Me5H gives no C5Me5 complex (although in C6D6 active H–D exchange with the phosphine protons is observed); however [Ru(C5Me5)Cl2]n when treated with phosphine (L = PMe3, PPh3
氢化物期RuH 2(C 5 H ^ 6)(PCY 3)2(2)和期RuH(C 5 H ^ 5)(PCY 3)2(3)(CY =环己基)形成在期RuH的反应6(PCY 3)2(1)用环戊烯,虽然仅在3,3-二甲基丁-1-烯存在下定量地形成(3),但用C 5 Me 5 H处理(1)不会得到C 5 Me 5络合物(虽然在C中观察到6 D 6与膦质子的活性H–D交换);然而,当用磷化氢(L = PMe 3,PPh 3,PPr i 3或Pcy 3)处理时,[Ru(C 5 Me 5)Cl 2 ] n产生顺磁性配合物RuCl 2(C 5 Me 5)L,在四氢呋喃中用LiBHEt 3处理产生新的三氢化物RuH 3(C 5 Me 5)L。
Terminal Phosphido Complexes of the Ru(η<sup>5</sup>-Cp*) Fragment
作者:Jin Yang、Sophie Langis-Barsetti、Hayley C. Parkin、Robert McDonald、Lisa Rosenberg
DOI:10.1021/acs.organomet.9b00266
日期:2019.9.9
demonstrate enhanced nucleophilicity/basicity of the terminal phosphido ligand in 2 relative to that in complex 1. Complex 2 also exhibits greater lability of the PPh3 ligand, leading to substitutional product mixtures that were not observed for 1. Both of these features are consistent with the more electron-rich and sterically imposing nature of the Cp* ligand in 2 relative to the indenyl ligand in 1. Nevertheless
Synthesis, Protonation, and Reduction of Ruthenium–Peroxo Complexes with Pendent Nitrogen Bases
作者:Tristan A. Tronic、Werner Kaminsky、Michael K. Coggins、James M. Mayer
DOI:10.1021/ic3013987
日期:2012.10.15
pentamethylcyclopentadienyl ruthenium(II) complexes have been synthesized with cyclic (RPCH2NR′CH2)2 ligands, with the goal of using these [CpR′′Ru(PR2NR′2)]+ complexes for catalytic O2 reduction to H2O (R = t-butyl, phenyl; R′ = benzyl, phenyl; R″ = methyl, H). In each compound, the Ru is coordinated to the two phosphines, positioning the amines of the ligand in the secondcoordinationsphere where they may act