Ammonia → 4-Chloro-3-methoxyaniline

Temperature

-78 °C

900 mL of ammonia was condensed at −78° C. 1 g of thinly shaven strips of sodium was added followed by 1.0 g of iron (III) nitrate nonahydrate. Upon disappearance of the deep blue color 25 g of thinly shaven strips of sodium was added. After 30 mins of stirring at −78° C., 50 g of 2,5-dichloroanisole was added as a solution in hexane (70 mL) dropwise and the reaction warmed to −45° C. for 2 hrs. Upon completion the ammonia was allowed to evaporate. The crude pot was then diluted in chloroform and 100 g of NH4Cl was added slowly. The combines were taken up in a separatory funnel and washed with water (3×) followed by brine (1×). The organic layer was dried over sodium sulfate and concentrated in vacuo. The resulting solid can be used without further purification. Yield: 99%.

1. customcondensed at −78° C
2. temperaturethe reaction warmed to −45° C. for 2 hrs
3. customto evaporate
4. additionThe crude pot was then diluted in chloroform
5. addition100 g of NH4Cl was added slowly
6. customThe combines were taken up in a separatory funnel
7. washwashed with water (3×)
8. dry with materialThe organic layer was dried over sodium sulfate
9. concentrationconcentrated in vacuo
10. customThe resulting solid can be used without further purification

ORD record

ord-4b5a523603fd4ce2a4d381c05c57e5fa

Source dataset

uspto-grants-2014_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08877752B2