2,6-dichloro-N-trimethylsilylaniline synthesis

Yield:115910-92-4 97%

Reaction Conditions:

with trimethylsilyl bromide;triethylamine in benzene;

Steps:

1 Preparation of STR4

EXAMPLE 1 Preparation of STR4 A solution of 60 ml of benzene, 5.0 g (30.9 mmole) of 2,6-dichloroaniline, 10.6 ml (76.0 mmole) of triethylamine, and 8.08 ml (61.1 mmole) of trimethylsilyl bromide was heated at reflux for 54 hours, cooled, filtered, and the solvent was removed from the filtrate in vacuo. The residue was evacuated at 1 mm to remove any excess trimethylsilyl bromide. The residual mixture was filtered into a round-bottomed flask and distilled using a short Vigreaux column to provide 5.43 g (23.2 mmole, 75.0 percent yield) of the N-trimethylsilyl-2,6-dichloroaniline as a 97 percent pure amber oil, bp 74° C.-75° C. at 0.4 mm. NMR (CCl₄ +TMS): δ7.21 (two doublets, 7.0 Hz, 9.0 Hz, Ph-H₃ and Ph-H₅), δ6.62 (d of d, 7.0 Hz, 9.0 Hz, Ph-H₄), δ4.0 (broad s, NH), δ0.31 (s, Si(CH₃)₃). IR (film): 3400 cm^-1 (NH), 2980 cm^-1 (CH₃), 1585^-1 Ar-N).

References:

US4910306,1990,A