中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-乙酰苯甲醛 | p-formylacetophenone | 3457-45-2 | C9H8O2 | 148.161 |
对乙基苯乙酮 | 4-ethylacetophenone | 937-30-4 | C10H12O | 148.205 |
1,4-二乙酰苯 | 1,4-Diacetylbenzene | 1009-61-6 | C10H10O2 | 162.188 |
1-[4-(2-氨基乙基)苯基]-乙酮 | 1-[4-(2-Amino-ethyl)-phenyl]-ethanone | 31349-78-7 | C10H13NO | 163.219 |
4-(2-溴乙基)苯乙酮 | 1-[4-(2-bromoethyl)phenyl]ethanone | 40422-73-9 | C10H11BrO | 227.101 |
4-(2-氯乙基)苯乙酮 | 1-(4-(2-chloroethyl)phenyl)ethan-1-one | 69614-95-5 | C10H11ClO | 182.65 |
4-乙炔基苯乙酮 | 4-ethynylacetophenone | 42472-69-5 | C10H8O | 144.173 |
—— | 1-(4-acetylphenyl)ethanol | 15519-23-0 | C10H12O2 | 164.204 |
对羟基苯乙酮 | 4-Hydroxyacetophenone | 99-93-4 | C8H8O2 | 136.15 |
rac-1-(4-乙烯基苯基)乙醇 | 1-(4-vinylphenyl)ethanol | 17250-77-0 | C10H12O | 148.205 |
对氯苯乙酮 | para-chloroacetophenone | 99-91-2 | C8H7ClO | 154.596 |
4-乙烯基苯甲酸 | 4-Vinylbenzoic acid | 1075-49-6 | C9H8O2 | 148.161 |
4-碘代苯乙酮 | 4-Iodoacetophenone | 13329-40-3 | C8H7IO | 246.047 |
4-溴苯乙酮 | para-bromoacetophenone | 99-90-1 | C8H7BrO | 199.047 |
4-乙烯基苯甲酰氯 | p-vinylbenzoyl chloride | 1565-41-9 | C9H7ClO | 166.607 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4-acetyl-trans-stilbene | —— | C16H14O | 222.287 |
—— | 4-acetylstilbene | 3112-03-6 | C16H14O | 222.287 |
—— | 4-acetyl-4′-methyl-trans-stilbene | —— | C17H16O | 236.313 |
4-乙酰苯甲醛 | p-formylacetophenone | 3457-45-2 | C9H8O2 | 148.161 |
对乙基苯乙酮 | 4-ethylacetophenone | 937-30-4 | C10H12O | 148.205 |
—— | 1-(4-vinylphenyl)-2-methylpropan-1-one | 928758-07-0 | C12H14O | 174.243 |
—— | (E)-4-(4-acetylphenyl)but-3-en-2-one | 115665-94-6 | C12H12O2 | 188.226 |
—— | (E)-1-(4-(oct-1-en-1-yl)phenyl)ethanone | 118319-39-4 | C16H22O | 230.35 |
—— | 4-acetyl-4′-chloro-trans-stilbene | 63483-67-0 | C16H13ClO | 256.732 |
对氰基苯乙酮 | 4-cyanophenyl methyl ketone | 1443-80-7 | C9H7NO | 145.161 |
3-(4-乙酰基苯基)丙醛 | 3-(4-acetylphenyl)propanal | 150805-64-4 | C11H12O2 | 176.215 |
1-[4-(3-氯丙基)苯基]乙酮 | 1-[4-(3-chloropropyl)phenyl]ethanone | 91427-06-4 | C11H13ClO | 196.677 |
—— | (E)-4-(2-triethylsilanylvinyl)acetophenone | —— | C16H24OSi | 260.451 |
—— | p-Vinyl-β-dimethylaminopropiophenon | 21192-27-8 | C13H17NO | 203.284 |
4-乙酰基苯甲酸 | 4-acetyl-benzoic acid | 586-89-0 | C9H8O3 | 164.161 |
—— | (E)-1-(4-(4-methoxystyryl)phenyl)ethanone | —— | C17H16O2 | 252.313 |
—— | (2S)-2-(4-acetylphenyl)propanal | —— | C11H12O2 | 176.215 |
—— | (2R)-2-(4-acetylphenyl)propanal | —— | C11H12O2 | 176.215 |
—— | 4-acetyl-α-methylbenzeneacetaldehyde | 63476-27-7 | C11H12O2 | 176.215 |
—— | 4-isopropenylstyrene | 16262-48-9 | C11H12 | 144.216 |
1-(4-环丙基苯基)乙酮 | 1-(4-cyclopropylphenyl)ethanone | 6921-45-5 | C11H12O | 160.216 |
3-(4-乙酰基苯基)丙酸 | 3-(4-acetylphenyl)propanoic acid | 39105-51-6 | C11H12O3 | 192.214 |
—— | 3-(4-Acetyl-phenyl)-propionamide | 134306-92-6 | C11H13NO2 | 191.23 |
—— | (1S)-1-(4-vinylphenyl)ethanol | 1001347-80-3 | C10H12O | 148.205 |
—— | (1R)-1-(4-vinylphenyl)ethanol | 1001347-79-0 | C10H12O | 148.205 |
rac-1-(4-乙烯基苯基)乙醇 | 1-(4-vinylphenyl)ethanol | 17250-77-0 | C10H12O | 148.205 |
—— | [4-carboxy-4'-vinyldibenzoylmethane] | 132853-18-0 | C18H14O4 | 294.307 |
The reaction of 1-bromo-2-X-2-(Y-phenyl) ethane derivatives (1: X = Y = H; 2: X = Ph, Y = H; 3: X = H, Y = 4-Ac; 4: X = H, Y = 3-NO2; 5: X = H, Y = 4-NO2; 6: X = H, Y = 3-Me; 7: X = H, Y = 4-Me) in basic solution was studied, and in most cases, only the elimination product is formed. Only (2-bromo-1-phenylethyl)benzene, 2, yielded significant substitution product, and this yield decreased with the concentration of HO-. Addition of cyclodextrin (β-CD) diminished (about half for 0.02 M cyclodextrin concentration) the reaction rate of all substrates but 4 and 5. In the latter two cases, the rate rises. The observed rate-constant value at 0.5 M NaOH is 6.78 × 10-4 s-1 (at 40°C) and 1.80 × 10-3 s-1 (at 25°C) for 4 and 5, respectively. Under the same reaction conditions but with 0.01 M β-CD, the corresponding rates were 7.70 × 10-4 s-1 and 5.20 × 10-3 s-1. The elimination yield for 2 increased from 64 to 98% when the β-CD changed from zero to 0.02 M at 0.5 M NaHO. Also, there was an increase in the relative elimination products of 20-40% for compounds 6 and 7. The Hammet ρ values were 1.3 and 2.3 for the reaction in pure solvent and in the presence of β-cyclodextrin, indicating an increase in the negative character of the transition state for the reactions in the latter conditions. The results are interpreted in terms of the formation of an inclusion complex whose structure depends on the substrate.Key words: cyclodextrin, elimination reactions, inhibition, catalysis.