Tert-Butyl phenol

Thio-bis-(3-methyl-6-tert-butyl phenol) (antioxidant) 1... 

Wang resin was purchased from Advanced ChemTech (1% DVB, 0.70mmol/g substitution, 100-200 mash, Cat. SA5009). Anhydrous tetrahydrofuran (THF), A/A-dimcthyl-formamide (DMF), methanol, dichloromethane, pyridine, 1,1 -carbonyldiimidazole (CDI), piperazine, homopiperazine, trans-1,4-diaminocyclohexane, 4-(dimethylamino)pyridine (DMAP), succinic anhydride, diglycolic anhydride, 3-methyl-glutaric anhydride, 2-aminophenol, 2-amino-p-cresol, 2-amino-4-tert-butyl phenol, /V-methylmorpholine (NMM), triphenylphosphine, diethyl azodicarboxylate (DEAD), and trifluoroacetic acid (TFA) were purchased from Aldrich Chemical Company, Inc. and used without further purification. PyBOP was purchased from Novabiochem. 

Some examples of the sensitivities of the sensitized PMMA coatings are shown in Table 1, where 2,4,6-tri-tert-butyl phenol is most effective. 

Tri-tert-Butyl Phenol 4,41-Thio-bi s(6-tert-Butyl-3-methyl Phenol) 2,2 -Methylene-bi s(4-methyl -6-tert-Butyl Phenol) 2,2 -Methylene-bi s(4-ethyl -6-tert-Butyl Phenol) 330 150 131 133... 

The electron microscope images of the fine patterns obtained by PMMA itself and PMMA sensitized by 2,4,6-tri-tert-butyl phenol on the silicon wafer appear in Figs. 10 and 11, respectively. 

The comparison of the resistive property in the plasma etching process between PMMA itself and PMMA sensitized by 2,4,6-tri-tert-butyl phenol is shown in Fig. 12. Following the etching tim the thickness of the PMMA coating becomes thinner. The rate of the decreasing of the film thickness is proportional to the etching time in the former case, but it becomes very slow in the case of the sensitized PMMA. Therefore, the sensitized PMMA is a superior resist than PMMA itself in both properties of the sensitivity and the resistivity. This fact is true in the cases of other sensitizers. 

W/cm. The pseudo-first-order rate constant was 2.1 x 10 Vsec. Biphenyl was the only compound detected when the initial concentration of 2-chlorobiphenyl was 54 pM. At a concentration of 5.2 pM, other products were detected including chlorides and one or more of the following toluene, ethylbenzene, diethylbiphenyl, dibutenylbiphenyl, phenol, phenylphenol, di-tert-butyl phenol, and cyclohexenyl diphenol. 

The samples investigated initially were commercial high pressure low density, linear low density and high density polyethylenes and had properties given in Table 1. Solutions of these polymers were prepared in concentrations of 0.8 to 3.5 g/1 by dissolving the pol5rmer over a time period of two hours in an oven maintained at 145°C. To avoid degradation 0.05% 4,4 -thiobis(3-methyl-6-tert-butyl phenol) was used as an antioxidant in the solutions. 

In ahnlicher Wdse erhalt man durch Erhitzen von 4-Amino-2-tert.-butyl-phenol-Dihy-drogensulfat mit 4-Methyl-anilin 2-tert.-Butyl-4-(4-methyl-anilino)-phenol2 ... 

Fig. 1 Spectra measured 50, 250 and 1000 ps (downwards from the top) upon fs-laser photolysis of 5xl0"3 mol dm"3 2,6-di-tert.-butylphenol (left) or 4-methyl-2,6-di tert.-butyl phenol (right) in pure acetonitrile and in samples containing 1 mol dm"3 water (below).

The oxidation of ds-2-hexene (II) catalyzed by palladium acetate proceeds after an induction period of 2-4 hrs shown in Figure 4. Using 0.00163M palladium acetate total inhibition of reaction was observed with 1.08 X 10 5M quinol. 2,4,6-tri (tert-Butyl) phenol (5.60 X 10 5M) only showed the reaction without total inhibition. The formation of the allylic complex IVb proceeds in a similar way to the reaction of I, and it is the major species in the catalyst solutions. The formation of unsatu-... 

Dinitro-4-(tert-butyl)-phenol, crysts, mp 97-8°, is described in Beil 6, 525 [489] Butylphenol or Butylhydroxybenzene, Trinitro Derivative. c10HnN307 mw 285.21, N 14.73%. Only one isomer is described in the literature 3-(tert Butyl)-2,4,6 trinitrophenol. (CHg)3C.-C6H(0H)(N02)3 pale yel ndls(from ale), mp 172° was obtd by nitrating methyl ether of m-tert -butylphenol with mixed acid at 10-25°. Its expi props were not detd... 

Alkylation of /j-cresol by isobutylene is an important reaction in the synthesis of phenolic antioxidants. The activity of H3PW 2O40 for this reaction is greater by four orders of magnitude than that of H2S04 (160). Alkylation of p-(tert-butyl)phenol (TBP) with cyclohexene, 1-hexene, styrene, or benzyl chloride proceeds in the presence of H3PW 204o at 3373-423 K (204). 

Example Estimate Tb for 2,6-di(tert-butyl)phenol (molecular weight = 206.33 g/ mol) ... 

Example 4a) Estimate Koc and Kd for 2,6-di(tert-butyl) phenol in a soil containing 4% organic carbon using the Kow value of 5.43 listed in Table 8.7. 

Example 4b) Assuming no experimental values of Kow or S are available, estimate Koc for 2,6-di(tert-butyl) phenol from MCIs using the following expression (Meylan et al., 1992) ... 

Biaryls were obtained by C-alkylation using 2,6-di-tert-butyl phenolate as nucleophile with/rara-chlorobenzonitrile and 2-chloro-5-cyanopyridine676. Bromobenzonitriles and bro-mocyanopyridines have been employed in a study in which it was demonstrated that these compounds can be successfully used to arylate monoanions of / -dicarbonyl compounds677. 

The molecular structure of the polymer additive IRGANOX 1076 with Mr i = 531 is shown in Appendix III. To calculate the IRGANOX/ethanol partition coefficient use Eq. (4-103) and Table 4-8. Two structural increments are considered Wj(p/L> = 180 for ester and Wj(P/L) = 140 for the 2,6-di-tert-butyl-phenol ... 

To calculate the IRGANOX/water partition coefficient use Eqs. (4-98), (4-101) and (4-50) in combination with Table 4-6. The average-value Wj(G/p> = -4 is used for the ester increment in LDPE. For the 2,6-di-tert-butyl-phenol increment no value can be extracted from Table 4-6. But comparing the increments in Table 4-8 one half of the value for primary-alcohol is taken and one can use Wj(G/p) = 10 for LDPE. A four-fold branching has to be considered and this gives Wj(G/P) = 4 x (-5) = -20 (as average) ... 

Terephthalate-2-2-methylene-bis- (4-methyl-6-tert-butyl) phenole (HMP12) 810.6 0.918 (25) 44.0... 

Beispielhaft kann am System Triarylphosphan/2-Amino-4,6-di-tert.-butyl-phenol der Verlauf der Umsetzung gezeigt werden661 ... 

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