Реакция #45353

Уравнение реакции

methyl[3-formyl-5-(trifluoromethyl)benzyl]{[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}carbamate

2-methyl 2-butene

HCl

NaClO2

→

3-{[{[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}(methoxycarbonyl)amino]methyl}-5-(trifluoromethyl)benzoic acid

Растворители

H2O

EtOAc

THF

t-butanol

Условия реакции

Обработка

1. 1
   ЭкстракцияThe aqueous layer was extracted with EtOAc (3×20 mL)
2. 2
   Промывкаthe combined organic extracts were washed with brine (10 mL)
3. 3
   Сушкаdried over Na2SO4
4. 4
   Фильтрацияfiltered
5. 5
   Концентрированиеconcentrated
6. 6
   ДругоеPurification by flash chromatography with 0.1% acetic acid in 8% MeOH/CH2Cl2

Методика

To a solution of methyl[3-formyl-5-(trifluoromethyl)benzyl]{[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}carbamate (37.0 mg, 0.065 mmol) (Example 40) in THF (123 μL) was added t-butanol (360 μL), 2-methyl 2-butene (123 μL), and a solution of NaClO2 (12.9 mg, 0.014 mmol) and NaH2PO4 (19.7 mg, 0.014 mmol) in H2O (152 μL). The reaction was stirred vigorously for two hours at room temperature, diluted with EtOAc (30 mL), and poured into 1N HCl (10 mL). The aqueous layer was extracted with EtOAc (3×20 mL) and the combined organic extracts were washed with brine (10 mL), dried over Na2SO4, filtered, and concentrated. Purification by flash chromatography with 0.1% acetic acid in 8% MeOH/CH2Cl2 afforded 3-{[{[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}(methoxycarbonyl)amino]methyl}-5-(trifluoromethyl)benzoic acid. Rf=0.35 (10% MeOH/CH2Cl2). LCMS=584.3 (M+1)+. 1H NMR (C6D6, 500 MHz, 70° C.) δ 8.28 (broad singlet, 1H), 8.04 (broad singlet, 1H), 7.68 (broad singlet, 1H), 7.37-7.34 (m, 2H), 7.07-7.05 (m, 2H), 6.87 (s, 1H), 6.62 (d, J=8.0 Hz, 1H), 4.43 (broad singlet, 2H), 4.41 (broad singlet, 2H), 3.40 (s, 3H), 3.29 (s, 3H), 2.75 (m, 1H), 1.17 (d, J=6.5 Hz, 6H).

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