Trimethylsilyl cyanide → 1-(Aminomethyl)-6-bromo-1,2,3,4-tetrahydronaphthalen-1-ol

温度

60 °C

To a solution of 6-bromo-1,2,3,4-tetrahydronaphthalen-1-one (5.00 g, 22.0 mmol) and ZnI2 (300 mg) in toluene (50 mL) was added TMSCN (4.36 g, 44.0 mmol) at rt. The mixture was heated at 60° C. overnight. The reaction mixture was cooled to rt, and a solution of LAH (20.0 mL, 2.4 M in THF, 44.0 mmol) was added slowly. The reaction stirred at 40° C. for 2 h. The reaction was cooled to 0° C. was quenched with addition of EtOAc (10 mL) at 0 OC, and then water (5 mL) and aqueous 10% NaOH (5 mL). The mixture was filtered through Celite and concentrated to give the 4.5 g (79%) of the crude 1-(aminomethyl)-6-bromo-1,2,3,4-tetrahydronaphthalen-1-ol intermediate as a brown oil. To a solution of this intermediate (4.5 g, 17.4 mmol) in toluene (100 mL) was added 4N HCl/dioxane (20 mL) solution, and the mixture was stirred at reflux for 10 min. The mixture was cooled to room temperature and concentrated to give 3.6 g (75%) of the title compound as a tan solid. [M+H] calc'd for C11H12BrN, 237, 239. found 237, 239.

1. temperatureThe reaction mixture was cooled to rt
2. temperatureThe reaction was cooled to 0° C.
3. customwas quenched with addition of EtOAc (10 mL) at 0 OC
4. filtrationThe mixture was filtered through Celite
5. concentrationconcentrated

ORDレコード

ord-40d9848e64e74d11a471e17d69912954

出典データセット

uspto-grants-2016_09

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US09447046B2