1,3-dibromo-5-methylbenzene

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: Prepared from (4,4-dimethyl-1,4-dihydro-2-oxo-2H-3,1-benzoxazin-6-yl)boronic acid and 3,5-dibromotoluene according to Procedure B. White solid: mp 231-233° C.; 1H-NMR (DMSO-d6) δ10.4 (s, 1H), 7.66 (s, 1H), 7.58-7.56 (m, 2H), 7.50 (s, 1H), 7.37 (s, 1H), 6.95 (d, 1H, J=8.67 Hz), 2.37 (s, 3H), 1.67 (s, 6H); MS (ESI) m/z 344/346 ([M−H]−, 100%); Anal. Calc. For C17H16BrNO2: C, 58.98, H, 4.66, N, 4.05. Found: C, 58.82, H, 4.62, N, 3.94.

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

Procedure: A mixture of 3,5-dibromotoluene (2.0 g, 8.0 mmol), sodium methanesulfinate (0.92 g, 9.0 mmol), copper(I) iodide (152 mg, 0.8 mmol), proline (0.18 g, 1.6 mmol) and sodium hydroxide (64 mg, 1.6 mmol) in DSMO (15 mL, anhyd) was heated in a microwave unit (Biotage Initiator™) at 210° C. for min. The reaction was repeated two more times and the reaction mixtures were combined, diluted with H2O and extracted with EtOAc. The combined extracts were washed with H2O and brine, then dried (Na2SO4), concentrated and purified by chromatography (silica, EtOAc/Hex, 0:100 to 40:60) to give the title compound (1.2 g, 20% combined yield) as a white solid. GC-MS (EI): 248, 250. the reaction mixtures extracted with EtOAc The combined extracts were washed with H2O and brine dried (Na2SO4) concentrated purified by chromatography (silica, EtOAc/Hex, 0:100 to 40:60)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Step H1. A mixture of 3,5-dibromo-toluene (4.25 g, 17 mmol), NBS (3 g, 17 mmol), and AIBN (150 mg) in carbon tetrachloride (50 mL) was heated at 80° C. for 3 hours. The resulting mixture was run through a silicon gel column with dichloromethane as the eluant. The fraction was collected and solvent was removed by rotovap, crude 1,3-dibromo-5-(bromomethyl)benzene was obtained as a white residue. The fraction was collected solvent was removed by rotovap