Hydrochloric Acid → (S)-2-(4-(2-chlorophenoxy)-2-oxo-2,5-dihydro-1H-pyrrol-1-yl)-4-methylpentanoic acid

HRID 1051206Notes

Reaction equation

HRID 1051206 reaction equation
CC([OH:4])C.CC1(C)O[C@H](CN2C=CC(N[C:18](=[O:38])[C@@H:19]([N:24]3[CH2:28][C:27]([O:29][C:30]4[CH:35]=[CH:34][CH:33]=[CH:32][C:31]=4[Cl:36])=[CH:26][C:25]3=[O:37])[CH2:20][CH:21]([CH3:23])[CH3:22])=N2)CO1.Cl.C(OC)(C)(C)C>O>[Cl:36][C:31]1[CH:32]=[CH:33][CH:34]=[CH:35][C:30]=1[O:29][C:27]1[CH2:28][N:24]([C@@H:19]([CH2:20][CH:21]([CH3:22])[CH3:23])[C:18]([OH:38])=[O:4])[C:25](=[O:37])[CH:26]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 3776IsopropanolHCID 15413tert-Butyl methyl etherHCID 57920139(S)-2-[4-(2-chloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [1-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl-methyl)-1H-pyrazol-3-yl]-amide

Product 1

HCID 57346986(S)-2-(4-(2-chlorophenoxy)-2-oxo-2,5-dihydro-1H-pyrrol-1-yl)-4-methylpentanoic acidYield 80.4%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
27.5 °C

Procedure

To a 200-L glass-lined reactor was charged with 42.7 kg of 2-propanol and 13.6 kg (27.0 mol) of ((S)-2-[4-(2-Chlorophenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [1-((R)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-1H-pyrazol-3-yl]-amide. The suspension was stirred at 25-30° C. until the solids dissolved. After adjusting the batch temperature to <15° C., 59.5 kg of 2.0N hydrochloric acid was added over 3.5 h while maintaining a batch temperature of 9-17° C. The mixture was warmed to 18 to 23° C. and stirred for 5.5 h. HPLC analysis at 2 h indicated the reaction was complete. The reaction mixture was transferred into a 500 L glass-lined reactor and diluted with 28.6 kg of purified water and 166.1 kg of methyl tert-butyl ether. The aqueous phase was separated and the organic phase was washed with 1.0N sodium hydroxide solution, 10.7 wt % sodium chloride solution, and 1.0 wt % sodium chloride solution subsequently. The organic phase was transferred into a 200 L glass-line reactor. Solvents were removed by distillation in vacuo at 10-26° C. to a volume of ca. 27 L. The resulting oil was diluted with 107.6 kg of ethanol and solvents were removed by distillation in vacuo at 12-30° C. to afford 19.85 kg (10.04 kg corrected by wt %, 80.4% of yield) of (S)-2-[4-(2-Chloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [1-((R)-2,3-dihydroxy-propyl-1H-pyrazol-3-yl]-amide in ethanol. 1H NMR (300 MHz, DMSO-d6) δ ppm 0.90 (d, J=6.3 Hz, 3 H), 0.94 (d, J=6.3 Hz, 3 H), 1.33-1.50 (m, 1 H), 1.49-1.67 (m, 1 H), 1.68-1.85 (m, 1 H), 3.16-3.32 (m, 2 H), 3.70-3.93 (m, 2 H), 4.09 (m, J=13.6, 3.6 Hz, 1H), 4.21 (d, J=18.4 Hz, 1H), 4.61 (d, J=18.4 Hz, 1 H), 4.71 (t, J=5.6 Hz, 1 H), 4.79 (s, 1 H), 4.88 (dd, J=10.6, 4.8 Hz, 1 H), 4.94 (d, J=5.1 Hz, 1 H), 6.41 (d, J=1.5 Hz, 1 H), 7.37 (t, J=7.5 Hz, 1 H), 7.46 (t, J=7.5 Hz, 1 H), 7.50-7.56 (m, 2 H), 7.65 (d, J=7.5 Hz, 1 H), 10.78 (s, 1 H).

Workup

  1. dissolutiondissolved
  2. customto <15° C.
  3. temperaturewhile maintaining a batch temperature of 9-17° C
  4. temperatureThe mixture was warmed to 18 to 23° C.
  5. stirringstirred for 5.5 h
  6. customThe reaction mixture was transferred into a 500 L glass-lined reactor
  7. customThe aqueous phase was separated
  8. washthe organic phase was washed with 1.0N sodium hydroxide solution, 10.7 wt % sodium chloride solution, and 1.0 wt % sodium chloride solution subsequently
  9. customThe organic phase was transferred into a 200 L glass-line reactor
  10. customSolvents were removed by distillation in vacuo at 10-26° C. to a volume of ca. 27 L
  11. additionThe resulting oil was diluted with 107.6 kg of ethanol and solvents
  12. customwere removed by distillation in vacuo at 12-30° C.

Sources & evidence

ORD record
ord-96ce66ff8db2423ca184dc80404351cf
Source dataset
uspto-grants-2016_07
Patent number
US09388168B2

Reaction notes

Loading…