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Glyoxal → 6-Ethoxy-3-methyl-3,6-dihydro-2H-pyran-2-carbaldehyde
関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|---|---|---|
| 反応物 | Glyoxal | HCID 7860 | — |
| 反応物 | Phosphorus oxide (P4O10) | HCID 14812 | — |
| 反応物 | Pyran | HCID 186148 | — |
| 反応物 | Glyoxal hydrate | HCID 21880647 | — |
| 反応物 | 1-Ethoxy-1,3-pentadiene | HCID 53769642 | — |
| 生成物 | 6-Ethoxy-3-methyl-3,6-dihydro-2H-pyran-2-carbaldehyde | HCID 20571373 | — |
反応手順
Monomeric glyoxal was generated by heating a mixture of 8.0 g. of glyoxal hydrate (0.117 mol. of monomer) and 48.0 g. of phosphorus pentoxide over a gentle flame over 35 minutes. The liberated monomer was bubbled (argon stream) into 4.8 g. (0.04 mol) of 1-ethoxy-1,3-pentadiene (purity 92.3%) at 120°. After all the monomer had been generated, the solution was heated at 120° for an additional 45 minutes. Distillation afforded 1.32 g. of the pyran (b0.07 =56°, purity 91%) and 1.86 g. of recovered diene (yield based on diene-32%, based on glyoxal=6.6%).
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 特許番号 | US04225514 |
| 出典データセット | uspto-grants-1980_09 |
| ORD ID | ord-2366a6ae4634412587007d52d3c06a6a |
| 出典メモ | uspto-grants-1980_09 |