|
【结 构 式】 
|
【分子编号】35401 【品名】2-bromo-4-isopropoxybenzoyl chloride 【CA登记号】 |
【 分 子 式 】C10H10BrClO2 【 分 子 量 】277.5449 【元素组成】C 43.28% H 3.63% Br 28.79% Cl 12.77% O 11.53% |
合成路线1
该中间体在本合成路线中的序号：(II)2-Bromo-5-isopropoxybenzoic acid (I) was treated with oxalyl chloride to give the corresponding acid chloride (II) and subsequently condensed with the enantiomerically pure tetrahydroisoquinoline (III), yielding ester (IV). Intramolecular biaryl coupling by means of palladium acetate and tri(o-tolylphosphine) produced lactone (V), existing as an interconvertible mixture of its two atropo-diastereomeric forms. Reductive ring cleavage of this lactone using several hydride transfer reagents gave a separable mixture of two atropisomeric diols, from which the S-biar atropisomer (VI) was isolated by chromatography. After protection of the phenolic hydroxyl group of (VI) as the isopropyl ether (VII), oxidation of the primary alcohol with pyridinium chlorochromate (PCC) gave aldehyde (VIII). Stobbe condensation of (VIII) with diethyl succinate (IX) and NaOEt afforded the benzylidene succinic derivative (X).
| 【1】 Bringmann, G.; et al.; First atropo-divergent total synthesis of the antimalarial korupensamines A and B by the "lactone method". J Org Chem 2000, 65, 7, 2069. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| 32658 | 2-bromopropane | 75-26-3 | C3H7Br | 详情 | 详情 | |
| (I) | 35400 | 2-bromo-4-isopropoxybenzoic acid | C10H11BrO3 | 详情 | 详情 | |
| (II) | 35401 | 2-bromo-4-isopropoxybenzoyl chloride | C10H10BrClO2 | 详情 | 详情 | |
| (III) | 35402 | (1R,3R)-2-benzyl-8-isopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-6-isoquinolinol | C21H27NO2 | 详情 | 详情 | |
| (IV) | 35403 | (1R,3R)-2-benzyl-8-isopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-6-isoquinolinyl 2-bromo-4-isopropoxybenzoate | C31H36BrNO4 | 详情 | 详情 | |
| (V) | 35404 | (2R,4R)-3-benzyl-5,10-diisopropoxy-2,4-dimethyl-1,2,3,4-tetrahydro-8H-isochromeno[4,3-f]isoquinolin-8-one | C31H35NO4 | 详情 | 详情 | |
| (VI) | 35405 | (1R,3R)-2-benzyl-5-[2-(hydroxymethyl)-4-isopropoxyphenyl]-8-isopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-6-isoquinolinol | C31H39NO4 | 详情 | 详情 | |
| (VII) | 35406 | [2-[(1R,3R)-2-benzyl-6,8-diisopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-5-isoquinolinyl]-5-isopropoxyphenyl]methanol | C34H45NO4 | 详情 | 详情 | |
| (VIII) | 35407 | 2-[(1R,3R)-2-benzyl-6,8-diisopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-5-isoquinolinyl]-5-isopropoxybenzaldehyde | C34H43NO4 | 详情 | 详情 | |
| (IX) | 12313 | diethyl succinate | 123-25-1 | C8H14O4 | 详情 | 详情 |
| (X) | 35408 | (E)-4-[2-[(1R,3R)-2-benzyl-6,8-diisopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-5-isoquinolinyl]-5-isopropoxyphenyl]-3-(ethoxycarbonyl)-3-butenoic acid | C40H51NO7 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(II)2-Bromo-5-isopropoxybenzoic acid (I) was treated with oxalyl chloride to give the corresponding acid chloride (II) and subsequently condensed with the enantiomerically pure tetrahydroisoquinoline (III), yielding ester (IV). Intramolecular biaryl coupling by means of palladium acetate and tri(o-tolylphosphine) produced lactone (V), existing as an interconvertible mixture of its two atropo-diastereomeric forms. Reductive ring cleavage of this lactone using several hydride transfer reagents gave a separable mixture of two atropisomeric diols, from which the R-biar atropisomer (VI) was isolated by chromatography. After protection of the phenolic hydroxyl group of (VI) as the isopropyl ether (VII), oxidation of the primary alcohol with pyridinium chlorochromate (PCC) gave aldehyde (VIII). Stobbe condensation of (VIII) with diethyl succinate (IX) and NaOEt afforded the benzylidene succinic derivative (X).
| 【1】 Bringmann, G.; et al.; First atropo-divergent total synthesis of the antimalarial korupensamines A and B by the "lactone method". J Org Chem 2000, 65, 7, 2069. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| 32658 | 2-bromopropane | 75-26-3 | C3H7Br | 详情 | 详情 | |
| (I) | 35400 | 2-bromo-4-isopropoxybenzoic acid | C10H11BrO3 | 详情 | 详情 | |
| (II) | 35401 | 2-bromo-4-isopropoxybenzoyl chloride | C10H10BrClO2 | 详情 | 详情 | |
| (III) | 35402 | (1R,3R)-2-benzyl-8-isopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-6-isoquinolinol | C21H27NO2 | 详情 | 详情 | |
| (IV) | 35403 | (1R,3R)-2-benzyl-8-isopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-6-isoquinolinyl 2-bromo-4-isopropoxybenzoate | C31H36BrNO4 | 详情 | 详情 | |
| (V) | 35404 | (2R,4R)-3-benzyl-5,10-diisopropoxy-2,4-dimethyl-1,2,3,4-tetrahydro-8H-isochromeno[4,3-f]isoquinolin-8-one | C31H35NO4 | 详情 | 详情 | |
| (VI) | 35405 | (1R,3R)-2-benzyl-5-[2-(hydroxymethyl)-4-isopropoxyphenyl]-8-isopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-6-isoquinolinol | C31H39NO4 | 详情 | 详情 | |
| (VII) | 35406 | [2-[(1R,3R)-2-benzyl-6,8-diisopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-5-isoquinolinyl]-5-isopropoxyphenyl]methanol | C34H45NO4 | 详情 | 详情 | |
| (VIII) | 35407 | 2-[(1R,3R)-2-benzyl-6,8-diisopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-5-isoquinolinyl]-5-isopropoxybenzaldehyde | C34H43NO4 | 详情 | 详情 | |
| (IX) | 12313 | diethyl succinate | 123-25-1 | C8H14O4 | 详情 | 详情 |
| (X) | 35408 | (E)-4-[2-[(1R,3R)-2-benzyl-6,8-diisopropoxy-1,3-dimethyl-1,2,3,4-tetrahydro-5-isoquinolinyl]-5-isopropoxyphenyl]-3-(ethoxycarbonyl)-3-butenoic acid | C40H51NO7 | 详情 | 详情 |