Sodium hydride → Methyl 2-(4-(4-bromophenyl)-4-(hydroxymethyl)cyclohexylidene)acetate

反応式

[H-].[Na+].[CH3:3][O:4][C:5]([CH2:7]P(OC)(OC)=O)=[O:6].[Br:14][C:15]1[CH:20]=[CH:19][C:18]([C:21]2([CH2:28][OH:29])[CH2:26][CH2:25][C:24](=O)[CH2:23][CH2:22]2)=[CH:17][CH:16]=1>CO>[Br:14][C:15]1[CH:16]=[CH:17][C:18]([C:21]2([CH2:28][OH:29])[CH2:26][CH2:25][C:24](=[CH:7][C:5]([O:4][CH3:3])=[O:6])[CH2:23][CH2:22]2)=[CH:19][CH:20]=1

参加物

実験手順

To a round bottom flask containing methanol (60 ml) was added sodium hydride (0.78 g, 19.37 mmol) portion-wise at room temperature under stirring, Trimethyl phosphonoacetate (2.58 ml, 17.88 mmol) was added drop-wise and the resulting mixture was stirred at room temperature for 30 minutes. To this mixture was then added 4-(4-bromophenyl)-4-(hydroxymethyl)cyclohexanone (4.22 g, 14.90 mmol) in several portions and stirred at room temperature for overnight. The reaction mixture was then quenched with a saturated solution of ammonium chloride and subsequently concentrated to remove excess methanol. The residue was taken in saturated ammonium chloride solution and extracted twice with EtOAc. The combined organic portion was dried over sodium sulfate and concentrated to afford a crude product. Column purification afforded the title compound as viscous oil (4.36 g, 86% yield). LC/MS, ESI-MS: non-ionizable, RT: 1.32 (Condition E).