2-Propen-l-ol, 2-methyl

Methyl-2-propen-l-ol 2-Propen-l-ol, 2-methyl- (8,9) (513-42-8) Chlorotrimethylsilane Silane, chiorotrimethyl- (8,9) (75-77-4) 2-(AcetoxymethylJallyltrimethylsilane 2-Propen-l-ol, 2-[(trimethylsilyl)-methyl]-, acetate (10) (72047-94-0)... 

Reference (70) reports the hydrogenation of 2-propene-l-ol, 2-methyl-3-butene-2-ol, 1-hexene, and cyclohexene on the catalyst 5% Pt/silica gel in a series of 19 solvents. In all these solvents the strongest adsorption was observed for 2-propene-l-ol, the weakest was recorded for cyclohexene. The adsorptivity of 1-hexene was comparable to that of 2-methyl-3-butene-2-ol and varied markedly with the solvent. The weakest adsorptivity of cyclohexene may be assigned to the fact that here in fact we have a disubstituted double bond. By comparing the adsorptivities of 2-propene-l-ol and 1-hexene, it can be seen that the adsorptivity is favorably affected by the presence of the OH group on the a-carbon atom next to the double bond. On the contrary, the adsorptivity of 2-methyl-3-butene-2-ol was weaker, probably due to the steric effect of the methyl groups. 

Rodriguez, D., A. Rodriguez, A. Soto, A. Aranda, Y. Diaz-de-Mera, and A. Alberto (2008), Kinetics of the reactions of Cl atoms with 2-buten-l-ol, 2-methyl-2-propen-l-ol, and 3-methyl-2-buten-l-ol as a function of temperature, J. Atmos. Ghem., 59, 187-197. 

Cyclohexane Methylcyclohexane Phenol Terpenes Turpentine Alcohols Methyl alcohol Ethyl alcohol 2-propen-l-ol n-Propyl alcohol Isopropyl alcohol n-Butyl alcohol Amyl alcohol Isoamyl alcohol Aldehydes Formaldehyde Acetaldehyde Acrolein... 

Some solvents are reluctant to crystallize before turning into a glass, including allyl alcohol (2-propen-l-ol), ethylene glycol (1,2-ethanediol), and hexylene glycol (2-methyl-pentane-2,4-diol). Some common solvents may be liquid below their freezing points if they contain impurities, in particular small amounts of water. Thus, /-butyl alcohol (2-methyl-2-propanol), acetic acid, and phenol can appear liquid at or below ambient temperatures (i.e., < Tm) due to this cause. 

Acetat dea Methy. propen-(l)-ols-(3), [ Methyl-aUyl]-aoetat 2,137, II150. AUylpropionat 2, 241. 

Isoamyl alcohol 3-methyl 1-butanol 123-51-3 Ally alcohol 2-propen-l-ol 107-18-6... 

Cerveny et al. (7J) report hydrogenation of nine olefinic substrates (1-hexene, ethyl acrylate, allyl phenyl ether, allylbenzene, 3-butene-l-ol, 2-butene-l-ol, 3-butene-2-ol, 2-methyl-2-propene-l-ol, l-heptene-4-ol) in seven solvents (cyclohexane, diethyl ether, toluene, methanol, benzene, ethyl acetate, and 1,4-dioxane) on 5% Pt on silica gel. No linear relation could be proved for any of the substrates when Eq. (21) was applied to the set of data obtained in the hydrogenations. In all cases correlation points for benzene and toluene did not fit. On omitting these points, experimental data satisfied Eq. (21), but linear regression gave a nonzero absolute term q on the righthand side of the equation ... 

Hydroformylation of various unsarurated alcohols with different catalytic systems has been investigated by two research groups. Ziolkowski et al. have reported the hydroformylation of l-buten-3-ol, 2-methyl-2-propen-l-ol and 2-buten-l-ol with a catalytic system containing Rh(acac)(CO)2 and the water-soluble phosphine Ph2PCH2CH2C0NHC(CH3)2CH2S03Li (PNS). In all cases, the main products of the hydroformylation were 2-hydroxytetrahydrofuran derivatives formed via a hydroxyaldehyde cyclization [Eq. (4)] [12]. 

Butyn-l-ol Biacetyl Methyl acrylate l-Chloro-2-methyl-l-propene a-3-Chloro-2-buten-l-ol / -3-Chloro-2-buten-l-ol... 

Imamura et al. (2004) have measured the rate coefficient for the reaction of OH with 3-methyl-2-buten-l-ol using a relative rate method see table II-D-22. The rate coefficient values obtained with two reference compounds (di-n-butyl ether and propene) were in agreement. The preferred value at 298 K is based on the average of the obtained rate coefficients, k = 1.6 x 10 ° cm molecule" s with an estimated uncertainty of 25 %. 

Methyl-2-propen-l-ol, purchased from Aldrich Chemical Company, was distilled from anhydrous potassium carbonate. It was added directly to the n-butyllithium solution using a long needle. The checkers quickly replaced the pressure-equalizing dropping funnel with a serum cap to carry out this addition. The funnel was fitted to a small dry flask to prevent the introduction of moisture during the addition period and replaced on the reaction flask immediately afterwards. 

Dianion formation from 2-methyl-2-propen-l-ol seems to be highly dependent on reaction conditions. Silylation of the dianion generated using a previously reported method was unsuccessful in our hands. The procedure described here for the metalation of the allylic alcohol is a modification of the one reported for formation of the dianion of 3-methyl-3-buten-l-ol The critical variant appears to be the polarity of the reaction medium. In solvents such as ether and hexane, substantial amounts (15-50%) of the vinyl-silane 3 are observed. Very poor yields of the desired product were obtained in dirnethoxyethane and hexamethylphosphoric triamide, presumably because of the decomposition of these solvents under these conditions. Empirically, the optimal solvent seems to be a mixture of ether and tetrahydrofuran in a ratio (v/v) varying from 1.4 to 2.2 in this case 3 becomes a very minor component. 

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