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Search for "BHT" in Full Text gives 34 result(s) in Beilstein Journal of Organic Chemistry.
Determination of formation constants and structural characterization of cyclodextrin inclusion complexes with two phenolic isomers: carvacrol and thymol
Beilstein J. Org. Chem. 2016, 12, 29–42, doi:10.3762/bjoc.12.5
- antioxidants such as butylated hydroxytoluene (BHT) or butylated hydroxyanisole (BHA), suspected to be carcinogenic [13][14]. However, the major drawbacks for their use in food are their low aqueous solubility that limits their homogenous dispersion and their contact with pathogens [15], their susceptibility
Molecular-oxygen-promoted Cu-catalyzed oxidative direct amidation of nonactivated carboxylic acids with azoles
Beilstein J. Org. Chem. 2015, 11, 2158–2165, doi:10.3762/bjoc.11.233
- carboxylic acids. The reactions were totally inhibited by radical scavengers 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) and BHT (2,6-di-tert-butyl-4-methylphenol), suggesting that a radical pathway might be involved in these transformations (Scheme 7). A careful look at the literature reveals that Cu(II
Antioxidant potential of curcumin-related compounds studied by chemiluminescence kinetics, chain-breaking efficiencies, scavenging activity (ORAC) and DFT calculations
Beilstein J. Org. Chem. 2015, 11, 1398–1411, doi:10.3762/bjoc.11.151
- Table 1, that inhibition rate constants kA for all the dimers and monomers are of the same order of magnitude and manifest a moderate antioxidant capacity, comparable with those of butylated hydroxytoluene (BHT). In this model DL-α-tocopherol (11) exhibits two orders of magnitude higher antioxidant
Synthesis of a resin monomer-soluble polyrotaxane crosslinker containing cleavable end groups
Beilstein J. Org. Chem. 2014, 10, 2623–2629, doi:10.3762/bjoc.10.274
- methacrylate hydrochloride, N,N’-carbonyldiimidazole, ethyl 4-(dimethylamino)benzoate (DMBE), 3,5-di-tert-butyl-4-hydroxytoluene (BHT) and 2-hydroxyethyl methacrylate were purchased from Sigma-Aldrich Chemical Co. (St. Louis, MO, USA). Urethane methacrylate (Art ResinTM) was purchased from Negami Chemical
- crosslinker (50 wt % C12-Bu12-MA12 PRX and 25 wt % UDMA) with 5 wt % (to total monomer mixture) of initiator mixture (camphorquinone 2 wt %, CMBE 2 wt %, BHT 1 wt %) was dissolved in 200 wt % acetone and cast in a 8 mm in diameter and 0.5 mm deep disk-type Teflon assembly mold and dried by air blowing. The
Superoxide chemistry revisited: synthesis of tetrachloro-substituted methylenenortricyclenes
Beilstein J. Org. Chem. 2014, 10, 2531–2538, doi:10.3762/bjoc.10.264
- of the superoxide ion leading to the synthesis of tetrachloroaryl/vinyl-substituted nortricyclenes through its dual mode of action has been reported. KO2 was found to be superior and the only reagent to perform this kind of reaction over other conventional bases. Addition of the antioxidant BHT (2,6
- . Keywords: BHT; dehydrohalogenation/rearrangement; Friedel–Crafts acylation; methylenenortricyclene; superoxide ion; Introduction The chemistry of the superoxide ion (O2−·) has been a subject of growing interest because of its presence in all aerobic organisms as a respiratory intermediate [1][2][3][4][5
- the mechanistic aspects of the reaction we have treated 3f/4f under standard conditions by using the additive radical quencher and antioxidant BHT (5 mol %) afforded the product 5f in improved yield of 94% (Scheme 3). Similarly, substrates 3c/4c and 3i/4i afforded 5c and 5i in 91% and 89% yield
3-Pyridinols and 5-pyrimidinols: Tailor-made for use in synergistic radical-trapping co-antioxidant systems
Beilstein J. Org. Chem. 2013, 9, 2781–2792, doi:10.3762/bjoc.9.313
- reactive, phenolic antioxidants such as 2,6-di-tert-butyl-4-methylphenol (BHT), which we demonstrate herein. The antioxidants function in a synergistic manner to inhibit autoxidation; taking advantage of the higher reactivity of the 3-pyridinols/5-pyrimidinols to trap peroxyl radicals and using the less
- -di-tert-butyl-4-methylphenol (BHT, 10), 2,6-di-tert-butyl-4-methoxyphenol (DBHA, 11), a hindered analogue of the widely employed BHA, and 2,2,5,7,8-pentamethylchroman-6-ol (PMHC, 12), a synthetic analogue of α-tocopherol lacking its phytyl sidechain. While some of these rate constants have been
- , persistent phenols such as BHT (11). We anticipate that this work will prompt the use of antioxidant mixtures based on 3-pyridinol and 5-pyrimidinol antioxidants, in order to take advantage of the greater reactivities of these compounds, but to minimize the cost of doing so by making use of the inexpensive
Metal-free aerobic oxidations mediated by N-hydroxyphthalimide. A concise review
Beilstein J. Org. Chem. 2013, 9, 1296–1310, doi:10.3762/bjoc.9.146
- presence of the radical scavenger BHT no conversion was observed. (ii) The exclusion that epoxide could be an intermediate of the process. When 2-methyl-2-phenyloxirane was used in place of α-methylstyrene, poor results were obtained in terms of yield in acetophenone. (iii) The proof that the oxygen atom
Asymmetric synthesis of quaternary aryl amino acid derivatives via a three-component aryne coupling reaction
Beilstein J. Org. Chem. 2011, 7, 1570–1576, doi:10.3762/bjoc.7.185
- . DMG = directed metallation group. BHT = 2,6-di-tert-butyl-4-methylphenol. Proposed mechanism of α-arylation. Proposed extension of the methodology to synthesize quaternary adducts. Formation of α-methyl, α-aryl Schöllkopf adduct. Formation of quaternary adducts. Hydrolysis of quaternary adducts
Novel multi-responsive P2VP-block-PNIPAAm block copolymers via nitroxide-mediated radical polymerization
Beilstein J. Org. Chem. 2010, 6, 756–765, doi:10.3762/bjoc.6.89
- at 30 °C in THF as the mobile phase with a flow rate 1 mL/min. BHT was used as an internal standard on Polymer Laboratories linear columns (PLgel MIXED-BLS 10 mm). The parameters of the copolymers were determined by size exclusion chromatography (SEC) with a PL120 instrument equipped with RI detector
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