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Methyl iodide → Ethyl 2-(4-methylphenyl)propanoate
関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|---|---|---|
| 反応物 | Methyl iodide | HCID 6328 | — |
| 反応物 | Ethyl p-tolylacetate | HCID 84175 | — |
| 反応物 | Benzeneacetic acid, alpha-methyl-, ethyl ester | HCID 99643 | — |
| 反応物 | Lithium diisopropylamide | HCID 2724682 | — |
| 溶媒 | Tetrahydrofuran | HCID 8028 | — |
| 溶媒 | 2(1H)-Pyrimidinone, tetrahydro-1,3-dimethyl- | HCID 81646 | — |
| 生成物 | Ethyl 2-(4-methylphenyl)propanoate | HCID 11070524 | 86% |
反応手順
According to the procedure given for the synthesis of 202, ethyl p-tolylacetate (2.72 g, 15.2 mmol) was reacted with LDA (7.6 mL, 15.25 mmol) and methyl iodide (3.03 g, 21.30 mmol) in anhydrous THF (70 mL) and DMPU (1 mL). After aqueous workup and extraction, the residue was distilled in high vacuo to give 203 (2.5 g, 86.0%) as an oil. Bp 59-63° C./0.2 mmHg. 1H NMR (CDCl3): δ (ppm) 7.18 (d, 2 H, J=8.1), 7.10 (d, 2 H, J=8.1), 4.09 (m, 2 H), 3.67 (q, 1 H, J=7.2), 2.29 (s, 3 H), 1.47 (d, J=7.2 Hz, 3 H), 1.20 (t, J=5.7 Hz, 3 H). 13C NMR (75 MHz, CDCl3/TMS): δ (ppm) 174.71, 137.80, 136.63, 129.33, 129.14, 127.36, 60.66, 45.18, 21.05, 18.70, 14.15.
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 特許番号 | US08642653B2 |
| 出典データセット | uspto-grants-2014_02 |
| ORD ID | ord-af776805c1c24e9e8a397dbeb88e47ea |
| 出典メモ | uspto-grants-2014_02 |