With terephthaldehyde

Monomeric dihydrazides were prepared by the reaction of 2,4-D and CMPA derivatized tartrate and glutarate with hydrazine hydrate, and polymerized by reactions with HMDI to form polyureas. These monomeric derivatives were also polymerized with terephthaldehyde to form poly(Schiff base)s containing herbicide moieties (Scheme 3.11) [136]. The effect of structure and of the aqueous environment on the hydrolysis rates of 2,4-D from the polymers were investigated under various conditions. 

Symmetrical hexacatenars such as the first described phasmids were obtained as follows (Scheme 1) The three-chain derivative 2 was obtained by etherification of ester 1 with three equivalents of the required n-alkyl bromide, followed by saponification and hydrolysis (a). Esterification of acid 2 chloride with p-nitrophenol (b) afforded ni-troester 3, which was reduced to the corresponding aminoesterd (c). Finally, phasmid 5 was obtained by reaction of two equivalents of 4 with terephthaldehyde. 

Homer-Emmons condensation consists of substituted phosphonate ester reacted with terephthaldehyde in presence of potassium tert-butoxide to produce alternating copolymer. Fig. 12 [45]. 

Both carbonyl groups of terephthaldehyde are reported to react with the exocyclic nitrogen of 2-aminothiazole yielding 1.4-phenylene bis(2-methyleneamino)thiazole. The same report describes the reactions of 2-amino-4-phenylthiazole with terephth aldehyde and salicylaldehyde as yielding 64 and 65, respectively (Scheme 45) (215), whose structures are based on ultraviolet and infrared spectra. 

The polymerization of terephthaldehyde in the presence of triethoxyalu-minum391 or Uialkylaluminum392 (Tischchenko-Claisen reaction) yields random copolyesters containing ca. 1 1 mol ratio of p-methylenebenzoate and / -xyleneterephthalate units (Scheme 2.43). The reaction does not take place with sterically hindered aldehydes.392... 

Benzene and naphthalene compounds can be formylated under Vil-smeir conditions. The formyl compounds, with or without isolating, can be condensed with amino arenes to give leuco compounds. In this reaction, the benzhydrol intermediate is not isolated.21,79,84 86 The reaction is generally carried out in an alcohol solvent such as isopropanol, butanol, or pentanol and an acid catalyst such as hydrochloric acid, sulfuric acid, or methanesul-fonic acid.87 Acetic acid can also be used both as catalyst and as the solvent. Urea sometimes is added as catalyst.84,88 Terephthaldehyde reacts with W-diethyl-3-methylaniline89 and substituted azulenes to give a bis-triphenylmethane21 57 and 58, respectively. 

Mercuration reactions provide a convenient approach to a broad range of arylmercury derivatives.82,83 This approach has been applied to a number of substrates, including phenols, indoles, phenylpyridines, and fV-arylamides.83 The products of these reactions as well as their conditions are summarized in Table 1.84 91 Other examples of such reactions include the mercuration of 2-(2 -naphthyl)pyridine (Equation (251)92 and terephthaldehyde (Equation (26))93 with Hg(OCOCF3)2 and Hg(C104)2, which afford 72 and 73, respectively. 

Trimethylsilane in pentane is a particularly good system for the TMSI-catalyzed reductive coupling of tertiary alkoxytrimethylsilanes with aldehydes to form sterically crowded tertiary-primary ethers.337 In this way, 1 -(tert-butoxymethyl)-3-methylbenzene is formed in 87% yield (Eq. 184).338 Reaction of terephthaldehyde with two equivalents of the trimethylsilyl ether of 1-adamantanol under these conditions leads to a good yield of the diadamantyl ether of 1,4-benzenedimethanol (Eq. 185).338... 

B) Terephthaldehyde.—A 2-1. round-bottomed flask is fitted with a still-head, capillary ebullition tube, and receiver in an... 

Cescon and I had wondered if we could make polymeric HABIs. One proposed way was to make a biimidazole in which terephthaldehyde was used as starting material, and Jenkins provided us with this material. When Cescon oxidized this under his standard conditions, an intense bright blue color resulted (Scheme 4.5). 

A mixed-valence silver(I)-silver(III) cryptate complex has been synthesized by condensation of tris(3-aminopropyl)amme and terephthaldehyde in the presence of AgNOs. Other pyridine silver(III) complexes have been obtained by oxidation of silver nitrate and ammonia with ammonimn peroxydisulfate in aqueous ammonia solution. An air-stable diamagnetic silver(III) complex of a N-confused tetraphenylporphyrin, 5,10,15,20-tetraphenyl-2-aza-21-carboporphyrin argentate(III), has been described. ... 

The phosphorus ylide 109 (Wittig reagent) was treated with a variety of aldehydes to provide a selection of 2-ylidene-l,3-diselones 110 along with a significant amount of the dihydro compound 111 (Equation 11) <1996JOC2877>. Compound 103 was obtained in this manner from terephthaldehyde <1998T13257>. 

Several macrocyclic compounds have been prepared using Wittig reactions including tetraepoxyannulenes, which utilized the ylide derived from phos-phonium salt (57), and rotaxanes, molecules in which one or more macrocyclic components are trapped around a rod section of a dumbbell-shaped molecule, obtained by treating terephthaldehyde derivatives with dibenzylic bis(triphenyl-phosphonium)-stoppered [2]rotaxane (58). Aromatic triesters have been obtained by the (ethoxycarbonylmethylene)triphenylphosphorane-catalysedcyclo-trimerisation of ethyl propynoate. ... 

Xylylene dichlonde) + KOH - dibenzyl ether, 67, Boiling with Pb(NO,), - terephthaldehyde, 115... 

Cyano derivatives of PPV with high oxidation potential are commonly synthesized by Knoevenagel condensation of substituted terephthaldehyde with... 

Covalent cross-linking of PBI membranes is another possibility for improvement of their thermal, dimensional, and chemical stability. For example, the PBI can be cross-linked in the imidazole moiety with a low-molecular compound such as bisphenol A-diepoxide [15], divinyl sul-fone [16], terephthaldehyde [17], a-dibromo-p-xylene [18], or dichloromethyl phosphonic acid... 

Read [5] in 1912 reported obtaining an apparently high molecular weight solid by the strongly acid-catalyzed reaction of pentaerythritol and glyoxal. In 1951 Orth [6] reacted terephthaldehyde or 1,4-cyclohexanedione with 2,6-dioxaspiro[3,3]heptane to give polyspiroacetal resins [Eq. (5)]. In 1962 Cohen and Lavin [7-9] prepared similar polyspiroacetal resins from pentaerythritol and dialdehydes. 

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