反应详情

To the crude benzyl 4-(1-hydroxy-2-methylpropan-2-yl)-3-methoxybenzoate (from step 3) was added THF (2 mL) followed by aqueous NaOH (1.7 mL of 3.0 M, 5.0 mmol). The reaction mixture was stirred for 3 h. The reaction mixture was acidified to pH 3 and was extracted with EtOAc 3 times. The organic layers were dried over sodium sulfate and the solvent was evaporated to give 4-(1-hydroxy-2-methylpropan-2-yl)-3-methoxybenzoic acid. ESI-MS m/z calc. 224.1, found 224.2 (M+1)+; Retention time: 2.46 minutes (4 min run).

1. extractionwas extracted with EtOAc 3 times
2. dry with materialThe organic layers were dried over sodium sulfate
3. customthe solvent was evaporated