2-[5-(4-bromo-3-methoxycarbonyl-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester → 2-[5-(4-bromo-3-hydroxymethyl-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester

To the solution of 2-[5-(4-Bromo-3-methoxycarbonyl-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (200 mg, 0.44 mmol) in THF (4 ml) at −78° C. was added DIBAL-H THF solution (3.33 ml, 3.33 mmol). The mixture was warmed to 25° C. and stirred for 5 hours. The mixture was cooled to 0° C. and quenched with 2.0 N NaOH solution until PH=11. The mixture was extracted with EtOAc. The organic phase was washed with water and brine, and was dried with sodium sulfate. Concentration gave 2-[5-(4-bromo-3-hydroxymethyl-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (196 mg). m/z: 421.9 (M+H)+, 420.2 (M−H)−.

1. temperatureThe mixture was cooled to 0° C.
2. customquenched with 2.0 N NaOH solution until PH=11
3. extractionThe mixture was extracted with EtOAc
4. washThe organic phase was washed with water and brine
5. dry with materialwas dried with sodium sulfate
6. concentrationConcentration

ORDレコード

ord-a697374fe05745aca6babe32ed21e68b

出典データセット

uspto-grants-2012_01

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08088368B2