2.4- Di-t-butyl-6-

Thiophene, 3,5-di-t-butyl-2-methyl-sulfonation, 4, 764 Thiophene, 2,4-dicarboxy-synthesis, 4, 870 Thiophene, 2,3-dichloro-synthesis, 4, 933 Thiophene, 2,5-dichloro-synthesis, 4, 933 Thiophene, 3,4-dichloro-... 

Benzoquinone, 3,5-di-t-butyl-cobalt complexes, 2, 398 Benzoquinone dioximates metal complexes... 

Furthermore, the reaction of several hindered phenols, such as 2,6-di-t-butyl-4-methylphenol, 3,5-di-t-butyl-4-hydroxybenzyl alcohol, and 2,6-di-t-butylphenol, with BTMA Br3 were carried out in dichloromethane in the presence of water, t-butyl alcohol, or aq. sodium hydroxide at room temperature. Sequential reaction processes were provided by the obtained products. As an example, we show the reaction of 2,6-di-t-butyl-4-methylphenol with BTMA Br3 in Fig. 26 (ref. 34). 

Irganox 1076 [octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl) propionate], 2,6-di-t-butyl-4-methylphenol and diisooctyl phthalate were analyzed by GPC interfaced with both electrospray mass spectrometry (ESI-MS) and NMR.1 A deuterochloroform solvent was used. It was noted that a parallel arrangement was necessary to avoid backpressure on the NMR flow-probe that can... 

Preparation of diethyl 3,5-di-t-butyl-4-hydroxybenzylphosphonate — Reaction of a benzylic acetate with a trialkyl phosphite... 

Stable 2,4-disubstituted thiophene-3-carbonitrile oxides 7 and 3,5-di(t-butyl)-thiophene-2-carbonitrile oxide 8 were synthesized from respective aldoximes by the similar one-pot procedure (33—35). 

Certain organophosphorus compounds can be used to melt-stabilize PET. Stabilizers such as 3,5-di-t-butyl-4-hydroxybenzyl diethyl phosphate (Irganox 1222) and triphenylphosphate lead to a reduction in the concentration of terminal carboxyl groups of PET, thus giving improved hydrolytic stability. 

The phenols (no. 30a, 30b, 32) are used as reactants to synthesize several of the company s products, including the benzotriazoles. The 2-chloro-4,6-bls-isopropylam-ino-s-triazine (no. 13) are herbicides the chloro compound is used to control weeds and grass in corn and in milo, and the methoxy compound is used for general plant control. Several esters of 3-(3 ,5 -di-t-butyl-4 -hydroxyphenyl) propionic acid were identified, the most abundant being the octadecyl and methyl esters. 

The sediment concentrations of anthropogenic compounds in the cove were somewhat less variable than upstream this probably reflects the greater bottom uniformity of the cove. Fewer of the plant s compounds were detected in sediment from the channel where the cove leads into the brackish river (Point 18, Figure 1). Found at this location were various phenols (no. 28, 30a, 30b, 31, 33, 38, 39), di-t-butyl-benzoqui-none (no. 57), 3,5-di-t-butyl-4-hydroxy-benzaldehyde (no. 35), three benzotriazoles (no. 6, 10, 12), 4,4 -dichloro-3(trifluoromethyl) carbanilide (no. 77), and 2-chloro-4,6-bis-isopropylamino-s-triazine (no. 14). The only compounds from the plant detected in the sediment sample from the brackish river (Point 19) were the two high molecular weight benzotriazoles (no. 10 and 12) and methyl 3-(3 ,5 -di-t-butyl-4 -hydroxphenyl) propionate (no. 46). 

The potentially sexadentate macrocyclic ligands l,4,7-tris(3,5-dimethyl-2-hydroxybenzyl)-l,4,7-triazacyclononane (L H3), l,4,7-tris(3,5-di-t-butyl-2-hydroxybenzyl)-l,4,7-triazacyclononane (L"H3), and l,4,7-tris(3-t-butyl-5-methoxy-2-hydroxybenzyl)-l,4,7-triazacyclononane (L" H3) form the stable complexes of type [Mn L"]PF(5, [Mn L" ]PF(5 [M L "] [Mn L ]2(C104)3-(H30)(H20)3. These complexes were investigated by spectroelectrochemistry and were shown to undergo metal- and ligand-centered redox processes a phenoxyl radical Mn complex, [Mn L" ] +, was found to be accessible. 

The first reported low-spin iron(III) semiquinonate complex contained the 3,5-di-t-butyl-l, 2-benzoquinonate radical anion and a tetraazamacrocycle (tazm). It reacts reversibly with acetonitrile to give [Fe (tazm)(MeCN)2] plus 3,5-di-t-butyl-l,2-benzoquinone. " The related 1,2-iminobenzosemiquinonate (ibsq) complexes [Fe(ibsq)2X] have 5 = 5/2 for X = C1 and 5 =3/2 for X = I the complex with X = Br is a mixed spin (5=5/2, 3/2) species. " ... 

We have utilized somewhat less-effective optional approaches to copolymer purification with attendant catalyst recovery. One of these methods involved the replacement of the f-butyl substituents on the 5-position of the phenolate ligands with poly(isobutylene) (PIB) groups, as illustrated in Fig. 14 [39]. Importantly, this chromium(III) catalyst exhibited nearly identical activity as its 3,5-di-t-butyl analog for the copolymerization of cyclohexene oxide and carbon dioxide. The PIB substituents on the (salen)CrCl catalysts provide high solubility in heptanes once the copolymer is separated from the metal center by a weak acid. 

The double [4-1-1] cycloaddition with tetrachloro- and 3,5-di(t-butyl)-o-benzoquinone results in zwitterionic products with six-coordinate phosphorus (Equation (18)) <84TL552i>. 

The oxidative deamination mediated by 3,5-di-t-butyl-o-quinone [257] could very well involve aC- 0 1,5-sigmatropic hydrogen shift within the Schiff base network. This process in essence accomplishes oxidation of the amine and reduction of the quinone. The interesting point is the strong donor oxygen forces the nitrogen atom into an acceptor role during the reaction. 

Benzoquinone, 3,5-di-t-butyl-cobalt complexes, 398 Bcnzoselenophene, 2-(2-pyridyl)-metal complexes, 807 Benzothiazole-2-thiol metal complexes, 802 Benzotriazoles metal complexes, 78 P a, 77... 

In recent years, a considerable number of investigations have been carried out on the coordination chemistry of o-quinones, mainly with ligands based on 3,5-di-t-butyl-l,2-benzoquinone and its analogues. These compounds are capable of taking part in one-electron redox processes according to (5.12) [137] ... 

Template syntheses with the same ligand (3,5-di-t-butylcatechol) in the presence of ammonia with boron, aluminum, gallium, or strontium chloride, or with calcium or barium acetate produces, under oxidizing conditions, neutral complexes ML (M = BC1), ML2 (M = A1, Ga, Ca, Ba), and ML3H [181], The ligand L [fe(3,5-di-t-butyl-l-hydroxy-2-phenyl)amine] can be in different oxidation states the most important being the following 944 and 945 ... 

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