4-bromo-2,6-dimethyl-1-oxidopyridin-1-ium

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

Procedure: 4-Bromo-2,6-dimethylpyridine (0.5 g, 2.69 mmol) was dissolved in DCM (10 ml), cooled to 0° C. and combined with a solution of m-chloroperbenzoic acid in DCM (75%, 0.928 g, 4.03 mmol in 5 ml). The resulting mixture was stirred at 0° C. for 15 minutes and for 5 hours at room temperature. The mixture was washed with saturated sodium bicarbonate solution, the phases were separated with a phase separator, the organic phase was evaporated under reduced pressure. The residue was purified by column chromatography (silica, gradient of 0.5 to 10% methanol in DCM). 475 of a yellow solid was obtained (2.35 mmol, 88%). MS (ESI) m/z=204.0 [M+1]+. The mixture was washed with saturated sodium bicarbonate solution the phases were separated with a phase separator the organic phase was evaporated under reduced pressure The residue was purified by column chromatography (silica, gradient of 0.5 to 10% methanol in DCM) 475 of a yellow solid was obtained (2.35 mmol, 88%)

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

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

Procedure: The title compound was prepared from (S)-6-(2-hydroxy-2-methylpropyl)-6-phenyl-3-((S)-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)propyl)-1,3-oxazinan-2-one and 4-bromo-2,6-dimethylpyridine-N-oxide following a procedure analogous to that described in Example 1 Step 2. LC-MS Method 2 tR=1.185 min, m/z=489.2; 1H NMR (CDCl3) 0.96 (t, 3H), 1.03 (s, 3H), 1.12 (s, 3H), 1.81-2.00 (m, 4H), 2.11-2.22 (m, 5H), 2.30-2.42 (m, 1H), 2.57 (s, 6H), 2.87 (m, 1H), 5.43 (m, 1H), 7.09 (d, 2H), 7.18 (m, 1H), 7.22 (m, 4H), 7.26 (m, 2H), 7.31 (m, 2H).

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

Procedure: The title compound was prepared from (S)-6-(4-fluorophenyl)-6-(2-hydroxy-2-methylpropyl)-3-((S)-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethyl)-1,3-oxazinan-2-one one and 4-bromo-2,6-dimethylpyridine-N-oxide following a procedure analogous to that described in Example 1 Step 2. LC-MS Method 2 tR=1.354, m/z=493; 1H NMR (CDCl3) 1.18 (d, 6H), 1.48 (d, 3H), 2.08-2.21 (m, 5H), 2.36 (m, 1H), 2.53 (s, 6H), 2.82 (m, 1H), 5.65 (m, 1H), 6.98 (m, 4H), 7.18 (m, 4H), 7.28 (m, 2H).

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

Procedure: The title compound was prepared from (R)-6-(4-fluorophenyl)-6-(3-hydroxypropyl)-3-((S)-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethyl)-1,3-oxazinan-2-one and 4-bromo-2,6-dimethylpyridine-N-oxide following a procedure analogous to that described in Example 1 Step 2. LC-MS Method 2 tR=1.092, m/z=479.1; 1H NMR (CDCl3) 1.38 (m, 1H), 1.56 (d, 3H), 1.71 (m, 1H), 1.95 (m, 2H), 2.19-2.31 (m, 3H), 2.58 (s, 3H), 2.61 (s, 3H), 2.95 (m, 1H), 3.58 (m, 1H), 5.71 (m, 1H), 7.05 (m, 4H), 7.21-7.32 (m, 4H), 7.38 (m, 2H).

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

Procedure: The title compound was prepared from (S)-6-(2-hydroxy-2-methylpropyl)-6-phenyl-3-((S)-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethyl)-1,3-oxazinan-2-one and 4-bromo-2,6-dimethylpyridine-N-oxide following a procedure analogous to that described in Example 1 Step 2. LC-MS Method 2 tR=1.185, m/z=459.1; 1H NMR (CDCl3) 1.11 (s, 3H), 1.18 (s, 3H), 1.57 (d, 3H), 2.20 (s, 2H), 2.22-2.35 (m, 2H), 2.38-2.49 (m, 1H), 2.72 (s, 6H), 2.91 (m, 1H), 5.70 (m, 1H), 7.08 (d, 2H), 7.31 (m, 3H), 7.37 (m, 4H), 7.43 (s, 2H).

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

Procedure: The title compound was prepared from (S)-6-(2-hydroxy-2-methylpropyl)-6-phenyl-3-((S)-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethyl)-1,3-oxazinan-2-one and 4-bromo-2,6-dimethylpyridine-N-oxide following a procedure analogous to that described in Example 1 Step 2. LC-MS Method 2 tR=1.185, m/z=459.1; 1H NMR (CDCl3) 1.11 (s, 3H), 1.18 (s, 3H), 1.57 (d, 3H), 2.20 (s, 2H), 2.22-2.35 (m, 2H), 2.38-2.49 (m, 1H), 2.72 (s, 6H), 2.91 (m, 1H), 5.70 (m, 1H), 7.08 (d, 2H), 7.31 (m, 3H), 7.37 (m, 4H), 7.43 (s, 2H).