2- Allyl-6-methylphenol

Allyl mercaptan, p206 4-Allyl-2-methoxyphenol, m99 2-Allyl-4-methylphenol, m387 2-Allyl-6-methylphenol, m386... 

The oxidative polymerization of 2-allyl-6-methylphenol with 2,6-di-methylphenol yields thermosets capable of thermal curing. The copolymerization yields high-molecular-weight copolymers with a number average Mn around 50,000 Dalton The polymers have broad molecular weight... 

Dimethylphenol and 2-allyl-6-methylphenol are used together with di-iU,-hydroxo-bis[(MA, A W -tetramethylethylenediamine)copper(II)] chloride as a catalyst. Water/toluene is used as a heterogeneous solvent system. It was found that the molecular weight of Allyl-PPE could be easily controlled by changing... 

Nunoshige et al. developed a novel low-dielectric-loss thermosetting material by blending poly(2-allyl-6-methylphenol-co-2,6-dimethylphenol) (Allyl-PPE) with 1,2-bis(vinylphenyl)ethane (BVPE). BVPE could be used effectively as a cross-linking agent for Allyl-PPE, decreasing the cured temperature to 523 K or lower. The cured products exhibited better thermal and thermomechanical properties. The effect of the composition of the blends on the dielectric constant and the dielectric loss were evaluated (Nunoshige et al. 2007). 

Copolymers of 2,6-dimethylphenol with 2-allyl-6-methyl phenol have been synthesized. The allyl-substituted polymers were cured thermally or could be converted to the epoxy derivatives to give thermosetting polymers.Silicone macromers have been prepared by reaction of 2-allyl-6-methylphenol with SiH-terminated polysiloxanes by a platinum... 

In 1997, the first truly catalytic enantioselective Mannich reactions of imines with silicon enolates using a novel zirconium catalyst was reported [9, 10]. To solve the above problems, various metal salts were first screened in achiral reactions of imines with silylated nucleophiles, and then, a chiral Lewis acid based on Zr(IV) was designed. On the other hand, as for the problem of the conformation of the imine-Lewis acid complex, utilization of a bidentate chelation was planned imines prepared from 2-aminophenol were used [(Eq. (1)]. This moiety was readily removed after reactions under oxidative conditions. Imines derived from heterocyclic aldehydes worked well in this reaction, and good to high yields and enantiomeric excesses were attained. As for aliphatic aldehydes, similarly high levels of enantiomeric excesses were also obtained by using the imines prepared from the aldehydes and 2-amino-3-methylphenol. The present Mannich reactions were applied to the synthesis of chiral (3-amino alcohols from a-alkoxy enolates and imines [11], and anti-cc-methyl-p-amino acid derivatives from propionate enolates and imines [12] via diastereo- and enantioselective processes [(Eq. (2)]. Moreover, this catalyst system can be utilized in Mannich reactions using hydrazone derivatives [13] [(Eq. (3)] as well as the aza-Diels-Alder reaction [14-16], Strecker reaction [17-19], allylation of imines [20], etc. 

Allylphenols and derivatives with substituents in the allyl group can, be prepared by direct C-alkylation of the sodium salt of the phenol in benzene solution.16 This method is not as good for the preparation of allylphenols themselves as the one involving preparation of the allyl ether followed by rearrangement, because a mixture of several products is obtained in C-alkylation. Thus the alkylation of p-cresol in benzene with sodium and allyl bromide yields 20% of allyl 4-methylphenyl ether, 8% of allyl 2-allyl-4-methylphenyl ether, 40% of 2-allyl-4-methyl-phenol, and 15% of 2,6-diallyl-4-methylphenol.16 The rearrangement of allyl 4-methylphenyl ether, however, yields 2-allyl-4-methylphenol in practically quantitative yield, and the ether is easily obtained. 

Hydrated ruthenium dioxide will act as a catalyst for the oxidation of primary allylic alcohols (equations 8 and 9) in an oxygen atmosphere (a trace of the antioxidant 2,6-di-r-butyl-4-methylphenol is required to prevent autoxidation of the aldehyde to the acid). The oxidation is not accompanied by any loss in double bond stereochemistry, secondary allylic alcohols are oxidized but at a decreased rate, and saturated alcohols are scarcely oxidized at all. However, a-hydroxy ketones and a-hydroxylactones will oxidize under forcing conditions, so there is clearly likely to some degree of substrate dependence. ... 

In terms of practicality, molecular oxygen is a very attractive terminal oxidant. In this arena, a novel 7V-2 -chlorophenyl-2-pyridinecarboxamide ruthenium complex 29 has been reported to catalyze the efficient epoxidation of cyclic alkenes in the presence of 1 atm of oxygen and isobutyraldehyde, which is believed to coordinate to the catalyst and prevent the formation of unwanted allylic oxidation products. Using this system, cyclooctene 30 is converted to the corresponding epoxide in excellent yield in 9 h at ambient temperature. Interestingly, the reaction is shut down by the addition of 2,6-di-/er/-butyl-4-methylphenol, so that a i ical mechanistic pathway has been postulated <03CC1058>. 

The ternary inclusion complex formation of allyl bromide, tri-methylphenol and CyD is probably favorable for the modified a-CyD, making para attack of the allyl cation effective. 

Formylations of phenol, resorcinol and indole, dichloromethylations of 4-methylphenol and 5,6,7,8-tetrahydro-2-naphthol, carboxylation of phenol, and allylation of 2,4,6-trimethylphenol proceed site-selec-tively in high yields by using 3-cyclodextrin as catalyst. The formation of ternary inclusion complex composed of cyclodextrin, substrate, and dichlorocarbene, trichloromethyl cation or allyl cation in the reaction mixture is an important factor of the site-selective reactions. The cyclodextrin is also effective by limiting the molecular size of the reaction intermediate. 

The antibacterial compounds used in packaging materials are either synthetic or of namral origin and include (a) Organics allyl isothiocyanate, propionate, benzoate, sorbate, ethanol, linalool, methyl chavicol (l-allyl-4-methoxybenzene), dtral (3,7-dimethylocta-2,6-dienal ), methylcinnamate, methyleugenol, geraniol, 1,8-cineole, tra/is-a-bergamolene, carvacrol (5-isopropyl-2-methylphenol), thymol (2-isopropyl-5-methylphenol), l-octen-3-one, 3-octanol, ethyl pyruvate (ethyl... 

Also obtained from 2-allyl-5-methylphenol by treatment with perbenzoic acid in ethyl ether, first at 0°, then between 0° and 25° for 24 h (74%) [6589],... 

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