Sodium Hydroxide → (RS)-1-{(4-chlorophenyl)[4-(pyrrolidylmethyl)phenyl]methyl}-3-[(3,5-difluorophenyl)(methylsulfonyl)methylene]azetidine

HRID 25181Notes

Reaction equation

HRID 25181 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]([C:26]2[CH:31]=[CH:30][C:29]([CH:32]=O)=[CH:28][CH:27]=2)[N:9]2[CH2:12][C:11](=[C:13]([C:18]3[CH:23]=[C:22]([F:24])[CH:21]=[C:20]([F:25])[CH:19]=3)[S:14]([CH3:17])(=[O:16])=[O:15])[CH2:10]2)=[CH:4][CH:3]=1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].[NH:48]1[CH2:52][CH2:51][CH2:50][CH2:49]1.[OH-].[Na+]>ClCCCl>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]([C:26]2[CH:31]=[CH:30][C:29]([CH2:32][N:48]3[CH2:52][CH2:51][CH2:50][CH2:49]3)=[CH:28][CH:27]=2)[N:9]2[CH2:12][C:11](=[C:13]([C:18]3[CH:23]=[C:22]([F:24])[CH:21]=[C:20]([F:25])[CH:19]=3)[S:14]([CH3:17])(=[O:16])=[O:15])[CH2:10]2)=[CH:4][CH:3]=1

Participants

6

Reactant 4

HCID 14798Sodium HydroxideHCID 31268PyrrolidineHCID 5049666Sodium triacetoxyborohydrideHCID 22506638(-)-1-[(4-Chlorophenyl)(4-formylphenyl)methyl]-3-[(3,5-difluorophenyl)(methylsulfonyl)methylene]azetidine

Product 1

HCID 10280566(RS)-1-{(4-chlorophenyl)[4-(pyrrolidylmethyl)phenyl]methyl}-3-[(3,5-difluorophenyl)(methylsulfonyl)methylene]azetidineYield 51.1%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

0.75 g of (RS)-1-{(4-chlorophenyl)(4-formylphenyl)methyl}-3-[(3,5-difluorophenyl)(methylsulfonyl)methylene]azetidine and then 0.68 g of sodium triacetoxyborohydride are added to a solution of 0.10 g of pyrrolidine in 20 cm3 of 1,2-dichloroethane. After 20 hours at room temperature, 2 cm3 of 1 N sodium hydroxide are added, the product is extracted with 100 cm3 of dichloromethane, the organic phase is washed twice with 50 cm3 of water and then 50 cm3 of a saturated sodium chloride solution, dried over magnesium sulfate, filtered and concentrated to dryness under reduced pressure (2.7 kPa). The residue obtained is chromatographed on a silica gel column (particle size 0.04-0.06 mm, diameter 4.1 cm, height 13 cm), at an argon pressure of 0.5 bar with acetate as eluent and collecting 20 cm3 fractions. Fractions 10 to 18 are combined and then concentrated to dryness under reduced pressure (2.7 kPa). 0.39 g of (RS)-1-{(4-chlorophenyl)[4-(pyrrolidylmethyl)phenyl]methyl}-3-[(3,5-difluorophenyl)(methylsulfonyl)methylene]azetidine is obtained in the form of a white foam [NMR spectrum in DMSO-d6, T=300K, δ in ppm (300 MHz): 1.65 (4H, m, 2CH2), 2.40 (4H, m, 2NCH2), 3.02 (3H, s, SCH3), 3.50 (2H, s, NCH2Ph), 3.85 (2H, s, NCH2), 4.20 (2H, s, NCH2), 4.75 (1H, s, NCH), between 7.15 and 7.40 (9H, m, 9CH arom.), 7.48 (2H, d, J=7 Hz, 2CH arom.)].

Workup

  1. extractionthe product is extracted with 100 cm3 of dichloromethane
  2. washthe organic phase is washed twice with 50 cm3 of water
  3. dry with material50 cm3 of a saturated sodium chloride solution, dried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated to dryness under reduced pressure (2.7 kPa)
  6. customThe residue obtained
  7. customis chromatographed on a silica gel column (particle size 0.04-0.06 mm, diameter 4.1 cm, height 13 cm), at an argon pressure of 0.5 bar with acetate as eluent
  8. customcollecting 20 cm3 fractions
  9. concentrationconcentrated to dryness under reduced pressure (2.7 kPa)

Sources & evidence

ORD record
ord-8bb46af4618745d9bfba0cbeb38be157
Source dataset
uspto-grants-2005_02
Patent number
US06858603B2

Reaction notes

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