tert-butyl N-(4-aminophenyl)carbamate

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: Step A To a solution of N-Boc-1,4-phenylene diamine (Aldrich, 1.00 g, 4.82 mmol) in CH2Cl2 (12 ml) were added N,N-diisopropylethylamine (1.26 g, 9.76 mmol) and ethyl bromoacetate (Aldrich, 813 mg, 4.87 mmol). The mixture was allowed to stir at rt overnight and then taken up in EtOAc (300 ml) and washed with sat. aqueous Na2CO3, water and brine. The organic layer was dried over Na2SO4 and concentrated in vacuo to give ethyl 2-(4-(tert-butoxycarbonylamino)phenylamino)acetate as a light brown oil (1.33 g, 94%). washed with sat. aqueous Na2CO3, water and brine The organic layer was dried over Na2SO4 concentrated in vacuo

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2,4-Dichloro-5-fluoropyrimidine (75 mg, 0.45 mmol) was dissolved in a mixture of MeOH (2 ml) and H2O (0.2 ml). 4-tert-butoxycarbonylaminoaniline (374 mg, 1.8 mmol) was added and the mixture was refluxed for 24 hours (70° C. oil-bath temperature). The mixture was cooled to 22° C., concentrated to dryness under reduced pressure and subjected to column chromatography on silica gel (CHCl3-Acetone, 9:1) to give N2,N4-bis[4-(tert-butoxycarbonylamino)phenyl]-5-fluoro-2,4-pyrimidinediamine. 1H NMR (DMSO-d6+CD3OD): δ 7.96 (d, 1H, J=3.5 Hz), 7.63 (d, 2H, J=8.8 Hz), 7.49 (d, 2H, J=8.8 Hz), 7.37 (d, 2H, J=8.8 Hz), 7.24 (d, 2H, J=8.8 Hz), 1.45 (s, 9H), 1.43 (s, 9H); LCMS: purity: 97.9%; MS (m/e): 511.04 (M+, 100). The mixture was cooled to 22° C. concentrated to dryness under reduced pressure

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

Procedure: Triethylamine (7.36 mL, 52.82 mmol, 1.1 eq) is added at 0° C. to a stirred solution of N—BOC-1,4-phenylene diamine (10.00 g, 48.02 mmol, 1.0 eq) in CH3CN (240 mL), followed by 9-fluorenylmethyloxycarbonyl chloride (14.90 g, 57.62 mmol, 1.2 eq). The resulting mixture is allowed to warm to room temperature. After 4 hours stirring at room temperature, the reaction mixture is filtered to afford 20.60 g of the crude product as a white powder which is used in the next step without any further purification. the reaction mixture is filtered

Conditions: temp:0.00; pressure:0.00; stir: