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Isopropanol → 6-cyano-3,4-dihydro-2,2-dimethyl-trans-3-hydroxy-4-(2-methoxy-3-carbonylmethoxy-2-E-propen-1-yl)amino-2H-1-benzopyran
関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|---|---|---|
| 反応物 | Isopropanol | HCID 3776 | — |
| 反応物 | Sodium Iodide | HCID 5238 | — |
| 反応物 | Potassium Carbonate | HCID 11430 | — |
| 反応物 | Methyl (E)-4-Chloro-3-methoxy-2-butenoate | HCID 6364655 | — |
| 反応物 | (3S,4R)-4-amino-3-hydroxy-2,2-dimethyl-chroman-6-carbonitrile | HCID 10943936 | — |
| 生成物 | 6-cyano-3,4-dihydro-2,2-dimethyl-trans-3-hydroxy-4-(2-methoxy-3-carbonylmethoxy-2-E-propen-1-yl)amino-2H-1-benzopyran | HCID 86744643 | — |
反応手順
A mixture of 6-cyano-3,4-dihydro-2,2-dimethyl-trans-3-hydroxy-4-amino-2H-1-benzopyran (4.7 g), 4-chloro-3-methoxy-2-E-butenoic acid, methyl ester (3.55 g), potassium carbonate (5.95 g) and sodium iodide (3.2 g) was refluxed for 3 hours in isopropanol. After cooling the mixture was filtered and solvent removed from the filtrate under reduced pressure, to give 1.1 g of 6-cyano-3,4-dihydro-2,2-dimethyl-trans-3-hydroxy-4-(2-methoxy-3-carbonylmethoxy-2-E-propen-1-yl)amino-2H-1-benzopyran, a compound of formula (6). The compound was used in the next reaction (Example 3) with no further purification.
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 特許番号 | US04997846 |
| 出典データセット | uspto-grants-1991_03 |
| ORD ID | ord-244e01cd23f74bf6b94db5e2d81e7baa |
| 出典メモ | uspto-grants-1991_03 |