3-(methyldisulfanyl)propanoic acid

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:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 1.5 grams of disulfide acid from Example 70 in 30 mL of tetrahydrofuran was cooled in an ice bath. A 1.28 mL portion of isobutyl chloroformate followed by a 1.08 mL portion of N-methyl morpholine were added. After stirring for 5 minutes at 0° C., 0.77 grams of 6-amino 4-(3-bromoanilino)quinazoline was added. The mixture was stirred for 3 hours at 0° C. and then allowed to warm to room temperature. The reaction was quenched with water and the tetrahydrofuran was evaporated under vacuum. Addition of methylene chloride followed by washing the methylene chloride layer with water and evaporation of the solvent gave a crude product. Silica gel chromatography with methanol in methylene chloride gave 0.22 grams light yellow solid of product. were added The mixture was stirred for 3 hours at 0° C. to warm to room temperature The reaction was quenched with water the tetrahydrofuran was evaporated under vacuum Addition of methylene chloride by washing the methylene chloride layer with water and evaporation of the solvent gave a crude product

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 1.5 grams of disulfide acid from Example 70 in 30 mL of tetrahydrofuran was cooled in an ice bath. A 1.28 mL portion of isobutyl chloroformate followed by a 1.08 mL portion of N-methyl morpholine were added. After stirring for 5 minutes at 0° C., 0.77 grams of 6-amino 4-(3-bromoanilino)quinazoline was added. The mixture was stirred for 3 hours at 0° C. and then allowed to warm to room temperature. The reaction was quenched with water and the tetrahydrofuran was evaporated under vacuum. Addition of methylene chloride followed by washing the methylene chloride layer with water and evaporation of the solvent gave a crude product. Silica gel chromatography with methanol in methylene chloride gave 0.22 grams light yellow solid of product. were added The mixture was stirred for 3 hours at 0° C. to warm to room temperature The reaction was quenched with water the tetrahydrofuran was evaporated under vacuum Addition of methylene chloride by washing the methylene chloride layer with water and evaporation of the solvent gave a crude product