Water → tert-butyl 9-cyclopropyl-2,3-dihydro-1,4-benzoxazepine-4(5H)-carboxylate

Temperature

90 °C

A mixture of tert-butyl 9-bromo-2,3-dihydro-1,4-benzoxazepine-4(5H)-carboxylate (200 mg, 0.609 mmol), cyclopropylboronic acid (78.5 mg, 0.914 mmol), saturated aqueous sodium carbonate solution (3 ml), and tetrakis(triphenylphosphine)palladium(0) (19.0 mg, 0.0172 mmol) in dimethoxyethane (5 ml) was stirred at 90° C. for 12 hr under a nitrogen atmosphere. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate. The extract was washed with water, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1) to give the desired product (70.0 mg, 39.8%) as an oil.

1. extractionthe mixture was extracted with ethyl acetate
2. washThe extract was washed with water
3. dry with materialdried over anhydrous magnesium sulfate
4. customThe solvent was evaporated under reduced pressure
5. customthe residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1)

ORD record

ord-9c39ae421b854b089b49d7e3cce89e48

Source dataset

uspto-grants-2012_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08247403B2