4-chloro-2-iodo-6-methylaniline

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared in analogy to example 10 step A from 4-chloro-2-iodo-6-methyl-phenylamine (1.5 g, 5.61 mmol) and 1-chloro-2-ethynyl-benzene (920 mg, 6.73 mmol) to afford 4-chloro-2-(2-chloro-phenylethynyl)-6-methyl-phenylamine (1.06 g, 68%) as an off white solid. LC-MS (ESI): 276 (M+H)+.

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-chloro-2-methyl-phenylamine (1 g, 7.06 mmol) in acetic acid (20 ml) was added N-iodo succinimide (2.38 g, 10.59 mmol) portion wise at 25° C. under nitrogen. The reaction mixture was stirred at 25° C. for 16 h. The volatiles were removed in vacuo and the resultant crude residue was diluted with EtOAc (40 ml). The organic layer was washed with aqueous 1N NaOH solution (2×15 ml), followed by aqueous Na2S2O3 solution (2×15 ml), and brine (20 ml). The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated in vacuo to give a crude residue which was purified by flash column chromatography (5-10% EtOAc in hexane) to yield 4-chloro-2-iodo-6-methyl-phenylamine (1.5 g, 79%) as brown solid. GC-MS: 267 (M). The volatiles were removed in vacuo the resultant crude residue was diluted with EtOAc (40 ml) The organic layer was washed with aqueous 1N NaOH solution (2×15 ml) The organic layer was dried over anhydrous Na2SO4 filtered concentrated in vacuo to give a crude residue which was purified by flash column chromatography (5-10% EtOAc in hexane)