Ferrocenedicarboxylic acid

Monomers 1 and 2 have been synthesized starting from ferrocene, utilizing modifications of procedures outlined previously by Sonoda and MoritaniH and by Ratajczak et al. The intermediate diacid, l,l ferrocenedicarboxylic acid, was synthesized according to the more convenient procedure of Knobloch and Rauscher. Monomer JL was vacuum distilled prior to use (bp 120°C, 1 mm Hg). Details of the... 

Polypyrazoles of the type 62 have been prepared.65 These polymers are formed from the low-temperature solution condensation of 1,1 -bis(diketo)ferrocenes with aromatic or pseudoaromatic dihydrazines to give polyhydrazones which are transformed thermally to the polypyrazoles. Polybenzimadazole (63) has been prepared68 from l,l -ferrocenedicarboxylic acid and 3,3 -diaminobenzidine. 

Recently, the synthesis of l,l -bis(rert-butoxycarbonylamino)ferrocene 52 was reported, a convenient synthon of 1,1 -diaminoferrocene 30, which circumvents the problems encountered with the explosive diazide. The bis-Boc derivative is compatible with the peptide synthesis protocol, as is demonstrated by the preparation of its first amino acid conjugates. 1,1 -Bis(carbonylazido)ferrocene was synthesized from l,l -ferrocenedicarboxylic acid 7 by... 

Compounds with Oxygen in the Bridge Just as homoannular ferrocenedicarboxylic acid leads to a cyclic anhydride (23), so does the heteroannular ferrocenedicarboxylic acid. Thus treatment of the dichloride of ferrocene-1,1 -dicarboxylic acid with water in chloroform-pyridine gave the anhydride (34). Treatment of 34 with ammonium hydroxide led to ring opening and formation of the diamide and the monoamide-monoacid. ... 

By using reaction between amines and carboxylic acid, Zhang and coworkers reported the preparation of ferrocene-based shell cross-linked (SCL) thermoresponsive hybrid micelles with antitumor efficacy. The SCL micelle consisting of a cross-linked thermoresponsive hybrid shell and a hydrophobic core domain was fabricated via a two-step process micellization of poly(Af-isopropylacrylamide-co-aminoethyl methacrylate)- -polymethyl methacrylate P(NIPAAm-co-AMA)- -PMMA in aqueous solution followed by cross-linking of the hydrophilic shell layer via the amidation reaction between the amine groups of AMA units and the carboxylic acid functions of l,r-ferrocenedicarboxylic acid. ... 

Another structurally characterized example of an organometallic dicarboxylic acid is l,l -ferrocenedicarboxylic acid, (C5H4COOH)2Fe, 53 [119]. Compound 53 crystallizes in two modifications, monoclinic and triclinic, and the triclinic form has been investigated by X-ray diffraction. In this crystal structure the molecules of 53 adopt an eclipsed conformation and associate in the form of discrete hydrogen-bonded dimers. 

Figure 4.25 The hydrogen-bonded network which is formed from the mechanochemical reaction of ferrocenedicarboxylic acid (4.7) and 1,4-diazabicyclo[2.2.2]octane(DABCO) (4.8).

A series of l,r-oligoprolinoyl-feirocenes (5, 15-17) were obtained from 1,1 -ferrocenedicarboxylic acid (11), HOBt, EDC, and a series of oligoproline esters (Scheme 4) The monoproline derivative 5 was first obtained by Herrick via the acid chloride route. 

Ci2HioFeOi, 1, r-Ferrocenedicarboxylic acid (triclinic), 45B, 946 Ci2HioFeOft, 1,r-Ferrocenedicarboxylic acid (monoclinic), 40B, 1108 Cl2H1oHf02, Dicarbonyl-bis(cyclopentadienyl)hafnium, 45B, 947 Cl 2HioMn2N20i, trans-Di(Tr-cyclopentadienyl) (dicarbonyl) (dinitrosyl)-dimanganese, 39B, 607... 

Several special dicarboxylic acid salts were used to produce both fer-rocene and cobalticinum-containing polyesters. Ferrocene reactions to produce structure 9, were studied as a function of pH. The pK q for 1,1 -ferrocenedicarboxylic acid (FDCA) is not known but should be near 6.8. ... 

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