Sodium Iodide → 4-[3-(4-Cyclopropylmethoxypiperidin-1-yl)propyl]-6-fluoro-4H-benzo[1,4]oxazin-3-one

HRID 1986852Notes

Reaction equation

HRID 1986852 reaction equation
Cl[CH2:2][CH2:3][CH2:4][N:5]1[C:10]2[CH:11]=[C:12]([F:15])[CH:13]=[CH:14][C:9]=2[O:8][CH2:7][C:6]1=[O:16].[CH:17]1([CH2:20][O:21][CH:22]2[CH2:27][CH2:26][NH:25][CH2:24][CH2:23]2)[CH2:19][CH2:18]1.[Na+].[I-].C([O-])([O-])=O.[K+].[K+]>CC#N>[CH:17]1([CH2:20][O:21][CH:22]2[CH2:27][CH2:26][N:25]([CH2:2][CH2:3][CH2:4][N:5]3[C:10]4[CH:11]=[C:12]([F:15])[CH:13]=[CH:14][C:9]=4[O:8][CH2:7][C:6]3=[O:16])[CH2:24][CH2:23]2)[CH2:18][CH2:19]1

Participants

6

Reactant 4

HCID 5238Sodium IodideHCID 11430Potassium CarbonateHCID 171780104-(Cyclopropylmethoxy)piperidineHCID 68910689HCID 68910689, compound

Product 1

HCID 116319134-[3-(4-Cyclopropylmethoxypiperidin-1-yl)propyl]-6-fluoro-4H-benzo[1,4]oxazin-3-oneYield 57.2%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A 4 mL vial was charged with 4-(3-chloropropyl)-6-fluoro-4H-benzo[1,4]oxazin-3-one (0.097 g, 0.4 mmol), 4-cyclopropylmethoxypiperidine (0.042 g, 0.27 mmol), NaI (0.075 g, 0.5 mmol), and K2CO3 (0.069 g, 0.5 mmol) in MeCN (1 mL) and shaken at 50° for 20 h. The reaction mixture was quenched with water and the product extracted into EtOAc. The combined organic layers were dried over Na2SO4, filtered, and concentrated. The product was purified by cation exchange column chromatography followed by flash column chromatography (SiO2; EtOAc) to give the title compound (0.056 g, 57%). 1H NMR (CDCl3) d 6.80-6.71 (m, 2H), 6.52-6.47 (m, 1H), 4.38 (s, 2H), 3.77 (t, J=7.2 Hz, 2H), 3.17-3.13 (m, 1H), 3.11 (d, J=6.8 Hz, 2H), 2.59-2.56 (m, 2H), 2.19 (t, J=6.8 Hz, 2H), 1.95-1.89 (m, 2H), 1.75-1.62 (m, 4H), 1.50-1.41 (m, 2H), 0.89-0.86 (m, 1H), 0.38-0.33 (m, 2H), 0.04-0.00 (m, 2H); 13C NMR (CDCl3) d 164.1, 158.3, 141.2, 129.8, 117.4, 109.4, 102.9, 74.7, 72.5, 67.6, 55.1, 51.4, 39.8, 31.3, 24.6, 10.9, 3.0.

Workup

  1. customThe reaction mixture was quenched with water
  2. extractionthe product extracted into EtOAc
  3. dry with materialThe combined organic layers were dried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe product was purified by cation exchange column chromatography

Sources & evidence

ORD record
ord-dff1daf9ea3b4c57a18eb80f510b6c77
Source dataset
uspto-grants-2009_06
Patent number
US07550459B2

Reaction notes

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