反应详情

A three necked flask purged with nitrogen is charged with aqueous 2N Na2CO3 (1.4 mL), 1,2-dimethoxyethane (3.7 mL), 2-methoxyphenyl boronic acid (206 mg, 1.35 mmol), anhydrous lithium chloride (123 mg, 2.9 mmol), 4-trifluoromethanesulfonyl-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester (321 mg, 0.96 mmol) and tetrakis(triphenylphosphine)palladium (56 mg, 0.048 mmol). The mixture is stirred at reflux for 2 h under nitrogen, cooled and concentrated under reduced pressure. The residue is partitioned between CH2Cl2 (10 mL), aqueous 2N Na2CO3 (10 mL), and concentrated NH4OH (1 mL). The aqueous layer is extracted twice with CH2Cl2. The combined organic layers are dried (MgSO4), filtered and concentrated to provide a crude oil. Flash chromatography (Hex/AcOEt/CH2Cl2: 5/1/1) provides the title compound.

1. customA three necked flask purged with nitrogen
2. temperatureat reflux for 2 h under nitrogen
3. temperaturecooled
4. concentrationconcentrated under reduced pressure
5. customThe residue is partitioned between CH2Cl2 (10 mL), aqueous 2N Na2CO3 (10 mL), and concentrated NH4OH (1 mL)
6. extractionThe aqueous layer is extracted twice with CH2Cl2
7. dry with materialThe combined organic layers are dried (MgSO4)
8. filtrationfiltered
9. concentrationconcentrated
10. customto provide a crude oil