Ethyl Acetate → HCID 70981869、化合物

To a stirring mixture of cyclohept-2-enone (26.96 g, 245.0 mmol) and tert-butyl carbamate (28.7 g, 245 mmol) in DCM (245 mL) was added bismuth nitrate pentahydrate (22.79 g, 47.0 mmol). The resulting mixture was stirred at room temperature overnight. The reaction was diluted reaction with ethyl acetate (500 mL) and water (300 mL) and the biphasic mixture was filtered through a bed of Celite. The bed of Celite was washed well with ethyl acetate and water, and layers of the filtrate separated. The organic layer was concentrated to an oil that was purified by silica gel chromatography (0-40% ethyl acetate in hexanes). Product containing fractions were concentrated to afford the title compound (31.09 g, 137 mmol, 55.9% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm 6.92 (d, J=7.03 Hz, 1H), 3.60 (d, J=8.59 Hz, 1H), 2.55-2.69 (m, 1H), 2.26-2.45 (m, 2H), 1.69-1.93 (m, 3H), 1.44-1.61 (m, 2H), 1.37 (d, J=5.08 Hz, 11H). MS (ESI) m/z 228.5 [M+H]+.

1. additionThe reaction was diluted
2. filtrationthe biphasic mixture was filtered through a bed of Celite
3. washThe bed of Celite was washed well with ethyl acetate and water, and layers of the filtrate
4. customseparated
5. concentrationThe organic layer was concentrated to an oil that
6. customwas purified by silica gel chromatography (0-40% ethyl acetate in hexanes)
7. additionProduct containing fractions
8. concentrationwere concentrated

ORDレコード

ord-88e9d82919854c128957973d4a1f4bac

出典データセット

uspto-grants-2015_09

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US09139534B2