Methanol → 2-(3-(Benzo[c][1,2,5]oxadiazol-5-yl)-5-chloro-4-(cyclopropylmethoxy)phenyl)-4-methylpentanoic acid

HRID 1183747Notes

Reaction equation

HRID 1183747 reaction equation
[N:1]1[O:2][N:3]=[C:4]2[CH:9]=[C:8]([C:10]3[CH:11]=[C:12]([CH:22]([CH2:28][CH:29]([CH3:31])[CH3:30])[C:23]([O:25]CC)=[O:24])[CH:13]=[C:14]([Cl:21])[C:15]=3[O:16][CH2:17][CH:18]3[CH2:20][CH2:19]3)[CH:7]=[CH:6][C:5]=12.CO.O.O[Li].O>C1COCC1>[N:1]1[O:2][N:3]=[C:4]2[CH:9]=[C:8]([C:10]3[CH:11]=[C:12]([CH:22]([CH2:28][CH:29]([CH3:31])[CH3:30])[C:23]([OH:25])=[O:24])[CH:13]=[C:14]([Cl:21])[C:15]=3[O:16][CH2:17][CH:18]3[CH2:20][CH2:19]3)[CH:7]=[CH:6][C:5]=12

Participants

6

Reactant 4

HCID 887MethanolHCID 962WaterHCID 168937Lithium hydroxide, monohydrateHCID 57995660Ethyl 2-(3-(benzo[c][1,2,5]oxadiazol-5-yl)-5-chloro-4-(cyclopropylmethoxy)phenyl)-4-methylpentanoate

Product 1

HCID 579955012-(3-(Benzo[c][1,2,5]oxadiazol-5-yl)-5-chloro-4-(cyclopropylmethoxy)phenyl)-4-methylpentanoic acidYield 64.8%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a stirred solution of ethyl 2-(3-(benzo[c][1,2,5]oxadiazol-5-yl)-5-chloro-4-(cyclopropylmethoxy)phenyl)-4-methylpentanoate (0.25 g, 0.565 mmol) in a mixture of THF (10 mL), methanol (10 mL) and water (5 mL) was added LiOH.H2O (118.7 mg, 2.828 mmol) at room temperature and the mixture was stirred at RT for 2 h. After complete consumption of starting material as monitored by TLC, the reaction mixture was diluted with water (10 mL) and acidified using 1 N HCl at 0° C. The aqueous layer was extracted with EtOAc (2×20 mL); combined organic extracts were washed with water (10 mL), brine (20 mL), dried over anhydrous Na2SO4, filtered and concentrated in vacuo. The crude material was purified by column chromatography to afford compound-2-(3-(benzo[c][1,2,5]oxadiazol-5-yl)-5-chloro-4-(cyclopropylmethoxy)phenyl)-4-methylpentanoic acid (152 mg) as an off white solid. 1HNMR (500 MHz) (CDCl3): δ (ppm) 7.92 (s, 1H), 7.85 (m, 1H), 7.72 (m, 1H), 7.46 (s, 1H), 7.25 (s, 1H), 3.65 (t, 1H), 3.48 (d, 2H), 1.95 (m, 1H), 1.65 (m, 1H), 1.55 (m, 1H), 1.22 (m, 1H0, 0.93 (d, 6H), 0.39 (d, 2H), 0.0 (m, 2H).

Workup

  1. customAfter complete consumption of starting material
  2. additionthe reaction mixture was diluted with water (10 mL)
  3. customat 0° C
  4. extractionThe aqueous layer was extracted with EtOAc (2×20 mL)
  5. washcombined organic extracts were washed with water (10 mL), brine (20 mL)
  6. dry with materialdried over anhydrous Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customThe crude material was purified by column chromatography

Sources & evidence

ORD record
ord-618ccb3281b5421babecfb099261b201
Source dataset
uspto-grants-2014_03
Patent number
US08664249B2

Reaction notes

Loading…