Acetic Acid → HCID 67468393, compound

HRID 1907998Notes

Reaction equation

HRID 1907998 reaction equation
[CH:1]1[C:10]2[N:9]3[CH:11]=[CH:12][CH:13]=[C:8]3[C:7]3([CH2:18][CH2:17][N:16](C(OCC4C=CC=CC=4)=O)[CH2:15][CH2:14]3)[O:6][C:5]=2[N:4]=[CH:3][CH:2]=1.CC(O)=O>CO.[Pd]>[CH:1]1[C:10]2[N:9]3[CH:11]=[CH:12][CH:13]=[C:8]3[C:7]3([CH2:18][CH2:17][NH:16][CH2:15][CH2:14]3)[O:6][C:5]=2[N:4]=[CH:3][CH:2]=1

Participants

5

Reactant 2

HCID 176Acetic AcidHCID 58551020HCID 58551020, compound

Product 1

HCID 67468393HCID 67468393, compound

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

A solution of benzyl spiro[piperidine-4,6′-pyrido[2,3-b]pyrrolo[1,2-d][1,4]oxazine]-1-carboxylate (220 mg, 0.586 mmol), AcOH (33 μL, 0.59 mmol) and Pd/C (22 mg, 0.21 mmol) in MeOH (2 mL) was stirred under a balloon on H2 for 6 hours. The mixture was filtered through celite and the fitrate was evaporated to give spiro[piperidine-4,6′-pyrido[2,3-b]pyrrolo[1,2-d][1,4]oxazine] (ESI-MS m/z calc. 241.1. found 242.5 (M+1)+; Retention time: 0.46 minutes (3 min run)). The residue was then taken up in THF (3 mL) before Na2CO3 (1.2 mL of 2.0 M, 2.4 mmol) was added. Boc2O (156 mg, 0.70 mmol) was added and the mixture was stirred at room temperature for 12 hours. N,N-dimethylethylenediamine (0.5 mL) was added and the mixture was stirred at room temperature for 30 min. The mixture was poured into water and was extracted with EtOAc (3×). The organics were combined, washed with 0.1N HCl (3×), brine, dried (Na2SO4) and filtered through a plug of silica to give tert-butyl spiro[piperidine-4,6′-pyrido[2,3-b]pyrrolo[1,2-d][1,4]oxazine]-1-carboxylate (134 mg, 67%). 1H NMR (400 MHz, DMSO) δ 8.18-8.13 (m, 1H), 8.12-8.00 (m, 1H), 7.69-7.56 (m, 1H), 7.32-7.12 (m, 1H), 6.39 (dd, J=5.8, 3.0 Hz, 1H), 6.33-6.20 (m, 1H), 3.94 (d, J=11.9 Hz, 2H), 3.26 (s, 2H), 2.02 (s br, 4H), 1.48 (d, J=2.3 Hz, 9H).

Workup

  1. filtrationThe mixture was filtered through celite
  2. customthe fitrate was evaporated

Sources & evidence

ORD record
ord-b71cbfa8b6c34db29923134a6d50fa46
Source dataset
uspto-grants-2013_12
Patent number
US08598164B2

Reaction notes

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