Tetrahydrofuran → methyl 2-(1-benzyl-4-(4-chlorophenyl)-6-methyl-7-oxo-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-5-yl)-2-hydroxyacetate

HRID 1473188Notes

Reaction equation

HRID 1473188 reaction equation
[CH2:1]([N:8]1[C:12]2[C:13](=[O:30])[N:14]([CH3:29])[C:15]([CH2:24][C:25]([O:27][CH3:28])=[O:26])=[C:16]([C:17]3[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][CH:18]=3)[C:11]=2[CH:10]=[CH:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Li+].C[Si]([N-][Si](C)(C)C)(C)C.[O:41]1CCCC1>>[CH2:1]([N:8]1[C:12]2[C:13](=[O:30])[N:14]([CH3:29])[C:15]([CH:24]([OH:41])[C:25]([O:27][CH3:28])=[O:26])=[C:16]([C:17]3[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][CH:18]=3)[C:11]=2[CH:10]=[CH:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

4

Reactant 3

HCID 8028Tetrahydrofuran2×HCID 2733832Lithium HexamethyldisilazideHCID 89462962methyl 2-(1-benzyl-4-(4-chlorophenyl)-6-methyl-7-oxo-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-5-yl)acetate

Product 1

HCID 89462710methyl 2-(1-benzyl-4-(4-chlorophenyl)-6-methyl-7-oxo-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-5-yl)-2-hydroxyacetateYield 82%

Conditions

Temperature
0 °C

Procedure

A solution of methyl 2-(1-benzyl-4-(4-chlorophenyl)-6-methyl-7-oxo-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-5-yl)acetate (2.3 g, 5.46 mmol) in Tetrahydrofuran (THF) (30 mL) was treated with LiHMDS (8.45 mL, 8.45 mmol) at −78° C. and then stirred for 1 hour. A solution of (2R,8aS)-(+)-(Camphorsulfonyl)oxaziridine (2.421 g, 10.56 mmol) in Tetrahydrofuran (THF) (20 mL) was added, the mixture was warmed to 0° C. and then stirred for 20 minutes. The mixture was quenched with HCl (1M) and then extracted with Ethyl acetate. The combined extracts were washed with brine, dried over Na2SO4 and concentrated. The residue was purified on silica gel (0-100% ethyl acetate/hexanes) to afford methyl 2-(1-benzyl-4-(4-chlorophenyl)-6-methyl-7-oxo-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-5-yl)-2-hydroxyacetate (3.3 g, 4.53 mmol, 82% yield) as a white solid. 1H NMR (400 MHz, CHLOROFORM-d) ppm 7.28 (s, 9H) 7.01-7.07 (m, 1H) 5.93-5.99 (m, 1H) 5.85-5.92 (m, 1H) 5.77-5.84 (m, 1H) 5.20-5.27 (m, 1H) 3.79 (s, 3H) 3.58 (s, 3H); LCMS (m/z) ES+=437 (M+1).

Workup

  1. stirringstirred for 20 minutes
  2. customThe mixture was quenched with HCl (1M)
  3. extractionextracted with Ethyl acetate
  4. washThe combined extracts were washed with brine
  5. dry with materialdried over Na2SO4
  6. concentrationconcentrated
  7. customThe residue was purified on silica gel (0-100% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-dbb1b038c0a241b1ac4bd93f2eac22c2
Source dataset
uspto-grants-2015_04
Patent number
US09012642B2

Reaction notes

Loading…