1,3-Dihydro-5-nitro-1′-[[2-(trimethylsilyl)ethoxy]methyl]spiro[2H-indene-2,3′-[3H]pyrrolo[2,3-b]pyridin]-2′(1′H)-one → (R)-5-amino-1'-{[2-(trimethylsilyl)ethoxy]methyl}-1,3-dihydrospiro[indene-2,3'-pyrrolo[2,3-b]pyridin]-2'(1'H)-one

HRID 2426172Notes

Reaction equation

HRID 2426172 reaction equation
[N+:1]([C:4]1[CH:5]=[C:6]2[C:27](=[CH:28][CH:29]=1)[CH2:26][C:8]1([C:16]3[C:11](=[N:12][CH:13]=[CH:14][CH:15]=3)[N:10]([CH2:17][O:18][CH2:19][CH2:20][Si:21]([CH3:24])([CH3:23])[CH3:22])[C:9]1=[O:25])[CH2:7]2)([O-])=O>CCO.[Pd]>[NH2:1][C:4]1[CH:5]=[C:6]2[C:27](=[CH:28][CH:29]=1)[CH2:26][C@:8]1([C:16]3[C:11](=[N:12][CH:13]=[CH:14][CH:15]=3)[N:10]([CH2:17][O:18][CH2:19][CH2:20][Si:21]([CH3:22])([CH3:23])[CH3:24])[C:9]1=[O:25])[CH2:7]2

Participants

4

Reactant 1

HCID 591667381,3-Dihydro-5-nitro-1′-[[2-(trimethylsilyl)ethoxy]methyl]spiro[2H-indene-2,3′-[3H]pyrrolo[2,3-b]pyridin]-2′(1′H)-one

Product 1

HCID 66973634(R)-5-amino-1'-{[2-(trimethylsilyl)ethoxy]methyl}-1,3-dihydrospiro[indene-2,3'-pyrrolo[2,3-b]pyridin]-2'(1'H)-one

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 702EthanolSolvent

Procedure

A mixture of 10% Pd/C (3 g) and (±)-5-nitro-1′-{[2-(trimethylsilyl)ethoxy]methyl}-1,3-dihydrospiro[indene-2,3′-pyrrolo[2,3-b]pyridin]-2′(1′H)-one from Step F (19.1 g, 46.4 mmol) was stirred vigorously in EtOH (400 mL) under an atmosphere of hydrogen (ca. 1 atm). After 18 h, the mixture was filtered through a pad of Celite, washing extensively with MeOH, and the filtrate was concentrated in vacuo to give the crude racemic compound. The enantiomers were resolved by HPLC, utilizing a Chiralcel OD column and eluting with MeOH. The first major peak to elute was (S)-5-amino-1′-{[2-(trimethylsilyl)ethoxy]methyl}-1,3-dihydrospiro[indene-2,3′-pyrrolo[2,3-b]pyridin]-2′(1′)-one, and the second major peak to elute was (R)-5-amino-1′-{[2-(trimethylsilyl)ethoxy]methyl}-1,3-dihydrospiro[indene-2,3′-pyrrolo[2,3-b]pyridin]-2′(1′H)-one, the title compound. MS: m/z=382 (M+1).

Workup

  1. filtrationthe mixture was filtered through a pad of Celite
  2. washwashing extensively with MeOH
  3. concentrationthe filtrate was concentrated in vacuo
  4. customto give the crude racemic compound
  5. washeluting with MeOH
  6. washThe first major peak to elute
  7. washthe second major peak to elute

Sources & evidence

ORD record
ord-6d944ebfa8b64002a99c3776735431ea
Source dataset
uspto-grants-2011_06
Patent number
US07968540B2

Reaction notes

Loading…