已使用57 FeMössbauer和1 H NMR光谱研究了一系列[3]二茂铁烯(FcP)衍生物。对于在中性和酸性介质中的2-乙酰基和3-乙酰基FcP,质子共振通过与未桥接物质的类比分配,它们本身使用特定的α氘代化合物进行了分析。2-乙酰基-FcP由于羰基官能团的平面外变形而显示出强烈屏蔽的甲基。由母体醇在CF 3 CO 2 H中生成相应的碳正离子,并对其NMR光谱进行了讨论。[3]二茂铁-6,8-二酮(A)在CF 3 CO 2 H中未质子化,在80%H 2 SO 4中单质子化给出对称的碳正离子。离子的NMR光谱已得到充分讨论。2-和3-乙酰基-FcP的莫斯鲍尔光谱表明,后者的四极分裂(QS)和异构体位移(IS)都异常低。
N-Vinyl Ferrocenophane Pyrrole: Synthesis and Physical and Chemical Properties
摘要:
A new synthesis of [3]ferrocenophan-1-one has been developed, and a Trofimov reaction has been applied to its ketoxime. The novel subsequent N-vinyl pyrrole ferrocenophane displays reversible electrochemical behavior centered on the ferrocene, without any participation of the pyrrole. Unexpected byproduct was also isolated, in which the a-pyrrolic position is methylated.
Reduction of Escherichia coli ribonucleotide reductase subunit R2 with eight water-soluble ferrocene derivatives
作者:Aimin Liu、David N. Leese、Jannie C. Swarts、A.Geoffrey Sykes
DOI:10.1016/s0020-1693(02)01102-7
日期:2002.9
Abstract Water soluble ferrocenes [Fe(Cp)(CpL)], where Cp − is the η 5 -cyclopentadienide ligand and the side chain L is (a) the carboxylic acid group –(CH 2 ) x CO 2 H with x =0–4 ( I – V ); (b) the complex x =2 with the β-methylene mono-methyl substituted ( VI ); (c) the amine hydrochloride derivative with L=CH(Me) NH 3 + ( VII ); and (d) the complex with two Cp rings bridged by the amine hydrochloride
摘要水溶性二茂铁[Fe(Cp)(CpL)],其中Cp-为η5-环戊二烯配体,侧链L为(a)羧酸基团–(CH 2)x CO 2 H,x = 0 –4(I – V);(b)被β-亚甲基单甲基取代的(VI)的络合物x = 2;(c)具有L = CH(Me)NH 3 +(VII)的胺盐酸盐衍生物;(d)具有两个被胺盐酸盐-CH(NH 3 +)CH 2 CH 2-(VIII)桥接的Cp环的配合物;已经制备了它们,并用作大肠杆菌核糖核苷酸还原酶的活性R2亚基的一当量还原剂。通过循环伏安法测定20 mM NaOH中酸I – VI的羧酸盐以及水中胺盐酸盐VII和VIII的形式还原电位E 1°'(25°C)与Nhe相比,我= 0.100 M(NaCl)。活性R2还原的二阶速率常数k 12(25°C)通过UV-Vis分光光度法测定,在I = 0.100 M时范围为0.15-0.50 M -1 s -1。 log
Ferrocenophane-based bifunctional organocatalyst for highly enantioselective Michael reactions
Highly enantioselectiveMichaelreactions between acetylacetone and trans-β-nitroolefins are achieved by a novel ferrocenophane-based tertiary amine-thiourea organocatalyst to provide the corresponding products in good to excellent yields (up to 95%) and enantioselectivities (up to 99% ee).
deformation of the carbonyl function. The corresponding carbenium ions were produced from the parent alcohols in CF3CO2H and their NMR spectra discussed. [3]Ferrocenophan-6,8-dione (A) was unprotonated in CF3CO2H, monoprotonated in 80% H2SO4 to give the symmetrical carbenium ion. The NMR spectrum of the ion is fully discussed. Mössbauer spectra of 2- and 3-acetyl-FcP revealed the latter to have an anomalously
已使用57 FeMössbauer和1 H NMR光谱研究了一系列[3]二茂铁烯(FcP)衍生物。对于在中性和酸性介质中的2-乙酰基和3-乙酰基FcP,质子共振通过与未桥接物质的类比分配,它们本身使用特定的α氘代化合物进行了分析。2-乙酰基-FcP由于羰基官能团的平面外变形而显示出强烈屏蔽的甲基。由母体醇在CF 3 CO 2 H中生成相应的碳正离子,并对其NMR光谱进行了讨论。[3]二茂铁-6,8-二酮(A)在CF 3 CO 2 H中未质子化,在80%H 2 SO 4中单质子化给出对称的碳正离子。离子的NMR光谱已得到充分讨论。2-和3-乙酰基-FcP的莫斯鲍尔光谱表明,后者的四极分裂(QS)和异构体位移(IS)都异常低。
Ferrocenyl catechols: synthesis, oxidation chemistry and anti-proliferative effects on MDA-MB-231 breast cancer cells
incorporating the [3]ferrocenophane motif. On the electrochemical timescale, phenolic compounds appear to oxidize to the quinonemethide, while catechol moieties form the o-quinone by a similar mechanism. Chemicaloxidation of selected compounds with Ag2O confirms this interpretation and demonstrates the probable involvement of such oxidative metabolites in the in vitro activity of these species.
to form a (13·n-BuLi) dimer that was also characterized by X-ray diffraction. Directed lithiation of the nonbridged ferrocenederivative 1-(dimethylaminobenzyl)ferrocene (16) with tert-butyllithium resulted in an opposite stereoselectivity to yield (R*,p-R*)-17, which forms a chiral dimeric structure in the solid state, as was revealed by its X-ray crystal structure analysis.
用正丁基锂处理α-二甲基氨基[3]二茂铁oph烷衍生物3导致在二茂铁单元的相邻Cp环上进行定向o-金属化反应,以选择性地产生(R *,R *,p - S *)非对映异构体4。类似地,rac - 12的锂化得到(R *,p - S *)- 13。这两种化合物均在晶体中形成以中心C 2 Li 2四元环部分为特征的内消旋型二聚体。化合物13用过量的正丁基锂结晶,形成(13 · n -BuLi)二聚体,该二聚体也通过X射线衍射表征。非桥二茂铁衍生物1-(二甲基氨基苄基)二茂铁(16)与叔丁基锂的直接锂化反应产生相反的立体选择性,生成(R *,p - R *)- 17,形成固态的手性二聚体结构,如通过X射线晶体结构分析所揭示的那样。