bluuebunny/crossref_metadata_2025_split huggingface dataset:
Silver(I) and Copper(I) Coordination Polymers Based on Thiaoxa‐Macrocycles
Authors: Kim Hyun Jee , Song Mi Ryoung , Lee So Young , Lee Jai Young , Lee Shim Sung 
Published: July 2008

AbstractTwo S2O2‐macrocycles with different ring size (L1: 17‐ and L2: 18‐membered) were synthesised and structurally characterised by X‐ray analysis. Reactions of L1 and L2 with silver(I) salts (ClO4– and NO3–) afforded respective ligand‐ and/or anion‐directed complexes 1–4 with different topologies; single‐stranded 1D coordination polymer [AgL1(ClO4)(DMSO)]n (1), double‐stranded 1D coordination polymer {[Ag2(L1)2(NO3)2]·DMSO}n (2), cyclic dimer [Ag2(L2)2(ClO4)2]·CH2Cl2·CH3OH (3) and 2D polymeric sheet [Ag(L2)NO3]n (4). Meanwhile, reactions of these two ligands with copper(I) iodide afforded 1D (5) and 2D (6a) coordination polymers linked with a rhomboid‐type Cu–I2–Cu unit, respectively. The formation of such discrete and continuous supramolecular complexes is discussed in terms of discrimination of the anion effect, ligand flexibility as well as interligand π‐π stacking interaction. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Substituent Effects in the Solid‐State Assembly of Silver(I) Complexes of 4‐Substituted 3,6‐Di(2‐pyridyl)pyridazines
Authors: Constable Edwin C. , Housecroft Catherine E. , Neuburger Markus , Reymann Sébastien , Schaffner Silvia 
Published: July 2008

AbstractThe reactions of one equivalent of silver(I) tetrafluoroborate with one equivalent of 4‐R‐3,6‐di(2‐pyridyl)pyridazine ligands (R = n‐C10H21, 4‐O2NC6H4, 4‐MeOC6H4, 4‐F3CC6H4, 4‐NCC6H4, 3,5‐Br2C6H3, 3,5‐(MeO)2C6H3) in acetonitrile are reported. All complexes have been structurally characterized, and are found to belong to one of four differentsolid‐state structure types: [AgL2][BF4], [Ag2L2][BF4]2, {[Ag3L2][BF4]3}n and {[Ag2(NCMe)2L2][BF4]2}n. For the bulk samples of these compounds, elemental analyses are consistent with formulations of [AgL2][BF4], [Ag2L2][BF4]2, but the two polymeric complexes analyse as 1:1 Ag:L complexes. In solution, 1H and 13C NMR spectra reveal only one ligand environment at room temperature for each product.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
N‐Heterocyclic Carbenes in Lewis Acid/Base Stabilised Phosphanylboranes
Authors: Adolf Ariane , Vogel Ulf , Zabel Manfred , Timoshkin Alexey Y. , Scheer Manfred 
Published: July 2008

AbstractThe reactions of 2‐borane‐1,3,4,5‐tetramethylimidazoline (BH3·NHCMe) with selected phosphane adducts of the Lewis acids B(C6F5)3 and Ga(C6F5)3 are studied. Among others, adducts (C6F5)3Ga·PH2Cp* (1a) and (C6F5)3B·PH2Cp* (2) are used as starting materials. When the (C6F5)3Ga–phosphane adducts 1a and (C6F5)3Ga·PPhH2 are treated with BH3·NHCMe, the Lewis acid/base stabilised phosphanylboranes (C6F5)3Ga·P(Cp*)HBH2·NHCMe (3a) and (C6F5)3Ga·P(Ph)HBH2·NHCMe (3b) are formed, respectively, by a hydrogen elimination reaction. In contrast, the reaction of BH3·NHCMe with the (C6F5)3B–phosphane adducts (C6F5)3B·PH2R [R = H, R = Cp* (2) and R = Ph] in CH2Cl2 at room temperature leads to the formation of a salt with the general formula [(C6F5)3BH][RPH2·BH2·NHCMe] (4a: R = H, 4b: R = Cp*, 4c: R = Ph). To synthesise the Lewis acid/base stabilised phosphanylborane with (C6F5)3B as a Lewis acid and 1,3,4,5‐tetramethylimidazolylidene (NHCMe) as a Lewis base, a different synthetic pathway was applied: the replacement reaction of the Lewis base. At room temperature, NHCMe displaced the amine in (C6F5)3B·P(Ph)HBH2·NMe3 to yield (C6F5)3B·P(Ph)HBH2·NHCMe (5). All compounds were comprehensively characterised by spectroscopic methods. Compounds 1a, 1b, 2, 3a, 3b and 5 were additionally characterised by X‐ray crystallographic analysis. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Copper(II) Complexes of Tridentate Schiff Bases of 5‐Substituted Salicylaldehydes and Diamines – The Role of the Substituent and the Diamine in the Formation of Mono‐, Di‐ and Trinuclear Species – Crystal Structures and Magnetic Properties
Authors: Rigamonti Luca , Cinti Antonio , Forni Alessandra , Pasini Alessandro , Piovesana Olivo 
Published: July 2008

AbstractWe describe some copper(II) complexes with tridentate anionic Schiff bases, L–, derived from the monocondensation of some 5‐substituted salicylaldehydes (5‐G‐salH, G = H, NO2 and OMe) with ethylenediamine (en) or 1,3‐diaminopropane (tn). Mononuclear [CuL(py)]+, dinuclear [Cu2L2]2+ and trinuclear [Cu3L3(μ3‐OH)]2+ compounds have been obtained, and factors affecting the nuclearity of complexes were investigated and found to depend on reaction conditions, the nature of G and the length of the diamine. The crystal structures of seven representative compounds have been determined. Magnetic studies on a dinuclear and a trinuclear species were also carried out, and the results were interpreted on the basis of the structural data and current superexchange models. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Iron and Cobalt Complexes of Tridentate N‐Donor Ligands in Ethylene Polymerization: Efficient Shielding of the Active Sites by Simple Phenyl Groups
Authors: Zabel Dirk , Schubert Anett , Wolmershäuser Gotthelf , Jones Robert L. , Thiel Werner R. 
Published: July 2008

AbstractTridentate 2,6‐bis[3(5)‐pyrazolyl]pyridines and 2,6‐bis(4‐pyrimidinyl)pyridine were synthesized and characterized spectroscopically and by single‐crystal X‐ray structure analysis. The derived complexes with FeCl2 and CoCl2 were investigated for their activity in the ethylene polymerization in the presence of methylalumoxane (MAO). Iron and cobalt catalysts bearing the ligand 2,6‐bis[5‐butyl‐1‐(4‐nitrophenyl)pyrazol‐3‐yl]pyridine showed moderate catalytic activity and gave PE with high molecular weight, although the aryl substituents are not equipped with additional bulky side chains in the 2,6‐positions to shield the metal centre. This can be explained by the geometric parameters of the pyrazole units, which provide efficient shielding of the active site, even with unsubstituted aryl groups. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Synthesis, Structure, Spectroscopic Studies and Magnetic Properties of the Tetrakis(5,7‐dichloro‐8‐quinolinolato)gadolinium(III) Complex
Authors: Artizzu Flavia , Bernot Kevin , Caneschi Andrea , Coronado Eugenio , Clemente‐Juan Juan M. , Marchiò Luciano , Mercuri Maria Laura , Pilia Luca , Serpe Angela , Deplano Paola 
Published: July 2008

AbstractThe synthesis and structural characterization of the neutral gadolinium tetrakis‐type complex with 5,7‐dichloro‐8‐quinolinolato (H5,7ClQ) ligands, [Gd(5,7ClQ)2(H5,7ClQ)2Cl], is reported. The GdIII ion is epta coordinated to one chloride ion and to four ligands: two N,O‐chelated monoanions and two as zwitterionic (+NH and O–) monodentate oxygen donors. Electronic and vibrational spectra provide suitable markers to distinguish the presence of deprotonated and protonated ligands. The magnetic behaviour of this compound was investigated and explained by taking into account that π–π stacking interactions between the (H5,7ClQ) ligands give rise to a ferromagnetic interaction between the gadolinium centres. The GdIII derivatives provide magnetic evidence for the presence of stacking interactions, which are usually undetectable in optically active ErIII derivatives.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Tetrahedral Assembly with Lanthanides: Toward Discrete Polynuclear Complexes
Authors: Hamacek Josef , Bernardinelli Gérald , Filinchuk Yaroslav 
Published: July 2008

AbstractWe report on the preparation of discrete 3D tetrametallic edifices containing trivalent lanthanides (Eu–Lu). Their formation is thermodynamically controlled through self‐assembly with a new tripodal ligand L possessing short binding strands. X‐ray crystallography shows that four nine‐coordinate cations adopt a regular tetrahedral arrangement in the solid state. These remarkable, highly charged structures are maintained in solution, as demonstrated by NMR spectroscopy, ESI‐MS and spectrophotometry.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Synthesis of Chlorinated Biphenyls by Suzuki Cross‐Coupling Using Diamine or Diimine‐Palladium Complexes
Authors: Kylmälä Tuula , Kuuloja Noora , Xu Youjun , Rissanen Kari , Franzén Robert 
Published: July 2008

AbstractSeveral novel diimines (Salen‐type ligands) 2a–2i and their reduced diamine counterparts 3b,3d–3g and 3i form complexes 4a–4i, 5b,5d–5g, and 5i with PdCl2 in DMF or methanol. Using 1 mol‐% of the isolated complexes 4e and 5f many polychlorinated biphenyls (PCBs) can be prepared in moderate to excellent yields according to the Suzuki cross‐coupling protocol with contact to air. Several 4‐acetylbiphenyls prepared by this method can be converted in moderate yields into the corresponding biphenylcarboxylic acids (BCAs) by alkaline cleavage. An X‐ray crystal structure determination confirms the structure of complex 5f.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Optically Active (Peptido‐carbene)palladium Complexes: Towards True Solid‐Phase Combinatorial Libraries of Transition Metal Catalysts
Authors: Jensen Jakob F. , Worm‐Leonhard Kasper , Meldal Morten 
Published: July 2008

AbstractThis work explores the potential of forming transition metal catalysts by combinatorial solid‐phase peptide chemistry to produce catalysts with enzyme‐like properties of stereoselectivity, regioselectivity and even substrate selectivity. A series of new functionalised carbene precursors/donors – imidazolium salts – each containing both amino acid and carboxylic acid functionality was synthesised in solution. The readily accessible carbene precursors were incorporated within the backbones of peptides attached to PEGA resin, by standard solid‐phase peptide coupling techniques. The synthetic strategy gave easy access to both mono‐ and didentate ligand systems, providing folded structures around the central transition metal atoms, with different degrees of steric congestion and bite angles. Changing the number of incorporated amino acids between the two carbene donors facilitated variation of the properties of the complexes. Both ligand systems were complexed to palladium(II) by standard base treatment, and the Pd complexes were studied by mass spectrometry and NMR spectroscopy. The monodentate (carbene)palladium complexes were each the product of enolisation of a neighbouring carbonyl group and loss of a proton, followed by coordination of the oxy anion to the palladium atom. The established methods are suitable for the combinatorial synthesis of palladium catalysts on solid support. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Catalytic Hydrogenation of 5,6‐Dihydro‐4H‐1,2‐oxazines Bearing a Functionalized Methylene Group at C‐3
Authors: Sukhorukov Alexey Yu. , Lesiv Alexey V. , Eliseev Oleg L. , Khomutova Yulia A. , Ioffe Sema L. , Borissova Alexandra O. 
Published: July 2008

AbstractThe catalytic hydrogenation of readily available methyl 2‐(5,6‐dihydro‐4H‐1,2‐oxazin‐3‐yl)acetates 6 has been studied. Dihydrooxazines 6 without an alkoxy substituent at C‐6 under mild hydrogenation conditions in methanol produce a dynamic mixture of enamines 7 and tetrahydro‐2‐furanamines 7′(α + β). These products can be transformed into 1,4‐amino alcohols 8 under more robust hydrogenation conditions or into isomeric dihydrofurans 9 and 10 if the reduction is carried out in glacial acetic acid. Reduction of dihydrooxazines 6h,i, which possess an alkoxy substituent at C‐6, under similar conditions affords pyrrolidine derivatives 12, 13 and 14. A general mechanistic scheme for the hydrogenation reaction that involves an initial N–O bond cleavage has been suggested. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Reusable Porphyrinatoiron(III) Complex Supported on Activated Silica as an Efficient Heterogeneous Catalyst for a Facile, One‐Pot, Selective Synthesis of 2‐Arylbenzimidazole Derivatives in the Presence of Atmospheric Air as a “Green” Oxidant at Ambient Temperature
Authors: Sharghi Hashem , Beyzavi Mohammad Hassan , Doroodmand Mohammad Mahdi 
Published: July 2008

AbstractAn efficient and highly selective synthesis of 2‐arylbenzimidazoles by condensation of a wide range of aryl aldehydes bearing electron‐donating or ‐withdrawing substituents and phenylenediamines in a single pot using a catalytic amount of (meso‐tetrakis(o‐chlorophenyl)porphyrinato)iron(III) chloride (5 mol‐%) in excellent isolated yields is described. The reactions were performed in the presence of atmospheric air as a “green” oxidant at ambient temperature in ethanol without any additives. To benefit from the recovery and reuse of the catalyst, a new iron(III) porphyrin–silica heterogeneous catalyst was prepared by simple and successful impregnation of (meso‐tetrakis(o‐chlorophenyl)porphyrinato)iron(III) chloride onto activated commercial chromatographic silica gel. The silica was modified by treatment with HCl solution followed by NaOH solution, giving rise to the transformation of –O– strained siloxane atoms and silanol–OH groups into terminal negatively charged silanol–O– groups. The heterogeneous catalyst was characterized by powdered X‐ray diffraction (XRD), scanning electronic microscopy (SEM), atomic force microscopy (AFM), thermogravimetry (TG) to analyse for nitrogen adsorption, and Raman and FTIR spectroscopy. Leaching experiments showed that the catalyst is most strongly anchored to the activated support after 10 cycles. T(o‐Cl)PPFeIII–SiO2 was successfully used for all runs performed by the homogeneous catalyst and exhibited high isolated yields, selectivity, reusability, and the potential for large‐scale synthesis. Mechanistically, the high‐valent oxido‐iron(IV)–porphyrin could be the key intermediate in this efficient and highly selective synthesis of benzimidazole derivatives. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Lewis Acid Catalyzed Addition of Pyrazoles to Alkynes: Selective Synthesis of Double and Single Addition Products
Authors: Tsuchimoto Teruhisa , Aoki Kazuki , Wagatsuma Tatsuya , Suzuki Yuichi 
Published: July 2008

AbstractSilver and zinc salts were found to efficiently catalyze the addition of an N–H bond of pyrazoles to alkynes. With silver triflate as a catalyst, two pyrazoles regioselectively attacked the same carbon atom of the C≡C bond of aliphatic terminal alkynes to give gem‐dipyrazolylalkanes predominantly. Replacement of silver triflate with zinc triflate allows us to achieve double addition of pyrazoles to aromatic terminal alkynes. In contrast to the selective double addition, the corresponding single addition of aliphatic and aromatic terminal alkynes exclusively proceeded in the presence of a catalytic amount of silver nitrate. Internal alkynes also participated in the single addition reaction with the aid of silver triflate as a catalyst. The notable feature of this protocol is the utilization of an addition reaction being optimal from environmental and atom‐economical points of view. The reaction mechanism is also described. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Synthesis and Phase Structures of Novel π‐Acceptor Discotic Liquid Crystalline Compounds Having a Pyrenedione Core
Authors: Yasutake Mikio , Fujihara Takashi , Nagasawa Akira , Moriya Keiichi , Hirose Takuji 
Published: July 2008

AbstractSeveral π‐acceptor discotic liquid crystalline compounds were synthesized by using a pyrenedione unit as a core. Terrace‐like and band‐like structures were revealed by polarized optical microscopy (POM) observations and XRD measurements. In conjunction with the results of the single‐crystal structure analysis of analogous crystalline compounds, all of the liquid crystalline compounds were confirmed to form a discotic lamellar phase DL2. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Elimination Mechanisms in the Aminolysis of Sulfamate Esters of the Type NH2SO2OC6H4X – Models of Enzyme Inhibitors
Authors: Spillane William J. , O'Byrne Andrew , McCaw Cheryl J. A. 
Published: July 2008

AbstractThe kinetics of the reaction of 4‐nitrophenyl sulfamate NH2SO2OC6H4NO2‐4 (1a) in acetonitrile (ACN) with a series of pyridines (pKa range ca. 8 units) and alicyclic amines (pKa range ca. 3.6 units) has been studied in the presence of excess amine at various temperatures. The compounds 1a–1f are important as model substrates for the medicinally important sulfamate esters 667‐coumate and emate and analogues. Pseudo‐first‐order rate constants (kobsd.) have been obtained mainly by the release of 4‐nitrophenol/4‐nitrophenoxide. Slopes of plots of kobsd. vs. [amine] gave second‐order rate constants (k2), and Brönsted plots were biphasic for the aminolysis (with alicyclic amines) with an initial slope β1 = 0.53 and a subsequent slope β2 = 0.19. The change in slope occurs near the first pKa of 1a (17.9) in ACN. Leaving‐group effects were probed by using the same series of phenyl sulfamates, i.e. 1a–f and the alicyclic amines N‐formylpiperazine and pyrrolidine. The reactions were considered to be dissociative in nature involving E2‐ and E1cB‐ type mechanisms with the phenyl sulfamate anion 2 being involved in pyridine and in the weaker alicyclic amines (β1 segment) and a phenyl sulfamate dianion 3 being involved with the stronger alicyclic bases (β2 segment). The calculation of Leffler indices (α) for bond‐forming (base···H+) and bond‐breaking (S–OAr) steps allows fuller interpretation of the mechanisms occurring, which are seen as having the N‐sulfonylamines, HN=SO2 and –N=SO2 on the reaction pathways leading to products. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Modular Routes Towards New N,O‐Bidentate Ligands Containing an Electronically Delocalised β‐Enaminone Chelating Backbone
Authors: Beckmann Udo , Eichberger Eva , Lindner Monika , Bongartz Melanie , Kunz Peter C. 
Published: July 2008

AbstractPolyketones are synthesised by a transition‐metal‐catalysed copolymerisation of olefins and carbon monoxide. Nickel complexes with N,O‐chelating ligands turned out to be promising catalysts in that field. In this work a series of new N,O ligands with an electronically delocalised β‐enaminone backbone were synthesised and fully characterised. The ligand design was inspired by the ligand found in the most efficient nickel catalyst for polyketone synthesis and developed to a highly modular LEGO®‐like arsenal of reactions to versatile substituted β‐enaminone ligands. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Convergent and Selective Synthesis of Pyrrolidinones, Piperidinones, Dihydropyridinones and Pyridinols from a Common Intermediate – Potential Precursors of Bioactive Products
Authors: Jida Mouhamad , Ollivier Jean 
Published: July 2008

AbstractTitanium‐mediated cyclopropanation of natural and unnatural β‐amino acid derivatives provides azabicyclo[3.1.0]hexan‐1‐ols as mixtures of diastereomers that are separable by silica‐gel chromatography. Depending on the ring cleavage procedure employed, these compounds lead efficiently to diverse intermediates for the synthesis of pharmaceuticals. Thus, depending on the experimental conditions, basic treatment can furnish racemic pyrrolidinones as a mixture of diastereomers and piperidinones. In contrast, the synthesis of optically active dihydropyridinones was achieved through a one‐pot FeCl3/AcONa reaction or performed by using bis(sym‐collidine)iodine hexafluorophosphate. Furthermore, whereas the palladium‐mediated hydrogenolysis of these dihydropyridinones furnished both chiral piperidinones and original pyridinols, a CeIV‐promoted radical process yielded chiral tricyclic piperidinones. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
The Use of a Bifunctional Copper Catalyst in the Cross‐Coupling Reactions of Aryl and Heteroaryl Halides with Terminal Alkynes
Authors: Wu Minyan , Mao Jincheng , Guo Jun , Ji Shunjun 
Published: July 2008

AbstractCopper‐catalyzed cross‐coupling reactions of aryl halides and heteroaryl halides with terminal alkynes were carried out in DMF at 110–130 °C to provide the corresponding coupling products in satisfactory‐to‐good yields by using inexpensive 8‐hydoxyquinoline as the ligand. Noteworthy is that the bifunctional copper catalyst was successfully applied in this alkynylation reaction for the first time.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Catalytic Version of and Reuse in Hypervalent Organo‐λ3‐ and ‐λ5‐iodane Oxidation
Authors: Ochiai Masahito , Miyamoto Kazunori 
Published: July 2008

AbstractHypervalent organoiodanes are one of the most valuable classes of oxidants for use in oxidative transformations of various kinds of functionalities in modern organic synthesis. This microreview provides an overview of the recently developed aryl iodide‐catalyzed oxidations, in which hypervalent organoiodanes(III and V) generated in situ serve as the actual oxidants. We also summarize recent attempts to improve the efficiency of recyclable hypervalent organoiodanes in oxidations, updating Togo's and Sakuratani's 2002 review.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Synthesis of Stannylated Allyl‐ and Vinylphosphonates via Molybdenum‐Catalyzed Hydrostannations
Authors: Jena Nivedita , Kazmaier Uli 
Published: July 2008

AbstractSyntheses of stannylated allyl and vinylphosphonates by molybdenum‐catalyzed hydrostannation of the corresponding propargyl‐ and alkynylphosphonate derivatives proceed with high regioselectivities. The stannylated phosphonates obtained are versatile building blocks for further modifications, such as iodinations or cross coupling reactions. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
γ‐(Hydroxyalkyl)naphthalene‐tetracarboxdiimides: Organic White Pigments
Authors: Langhals Heinz , Ritter Ulrike 
Published: July 2008

AbstractNaphthalene‐1,8:4,5‐tetracarboxdiimides were prepared from cyanoacetic acid and its alkylation, reduction and condensation with naphthalenetetracarboxylic dianhydride and exhibit strong light‐scattering and opacifying properties. Applications are discussed. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Synthesis of Some 2,2′:6′,2″‐Terpyridines Disubstituted in Positions 6 and 6″ with Head‐to‐Tail Oriented Amino Acids and Dipeptides: A Simple Entry to a Reversible Inducer of Folding in Amino Acid Sequences
Authors: Annunziata Rita , Benaglia Maurizio , Puglisi Alessandra , Raimondi Laura , Cozzi Franco 
Published: July 2008

AbstractThe 2,2′:6′,2″‐terpyridine scaffold has been identified as a conformationally discrete structural element potentially capable of inducing reversible folding in substituents, attached through suitable spacers to its 6,6″‐positions, by metal complexation/decomplexation or by protonation/deprotonation. The synthesis of some terpyridine–amino acids and terpyridine–dipeptide conjugates is described. The assembly of these conjugates has been achieved by connecting NH2‐ and CO2H‐protected glycine, alanine, and valine residues or antiparallel oriented AlaGly/GlyAla chains to the terpyridine scaffold through phenylacetylene spacers. Preliminary experiments showed that upon addition of Zn2+ to the amino acid substituted transoid terpyridine systems, folded cisoid complexes were formed. Also, bis(protonation) of the dipeptide‐substituted system resulted in the formation of a folded adduct. Reversibility of the folding process was shown by Zn2+ removal with triethylamine or deprotonation with aqueous ammonia. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)