Hydrochloric Acid → (R)-methyl 2-(4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)-2-phenylacetate

HRID 1750974Notes

Reaction equation

HRID 1750974 reaction equation
[CH3:1][O:2][C:3](=[O:35])[C@H:4]([N:11]1[C:15](=[O:16])[C:14]2([CH2:21][CH2:20][N:19](C(OC(C)(C)C)=O)[CH2:18][CH2:17]2)[N:13]([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[CH2:12]1)[C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1.Cl>O1CCOCC1>[O:16]=[C:15]1[C:14]2([CH2:17][CH2:18][NH:19][CH2:20][CH2:21]2)[N:13]([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[CH2:12][N:11]1[C@H:4]([C:5]1[CH:6]=[CH:7][CH:8]=[CH:9][CH:10]=1)[C:3]([O:2][CH3:1])=[O:35]

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 66652345(R)-tert-butyl 3-(2-methoxy-2-oxo-1-phenylethyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decane-8-carboxylate

Product 1

HCID 66652012(R)-methyl 2-(4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)-2-phenylacetateYield 108.8%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Procedure

Deprotection of (R)-tert-butyl 3-(2-methoxy-2-oxo-1-phenylethyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decane-8-carboxylate (410 mg, 0.86 mmol, 1 equiv) was accomplished in 3 hours in the presence of 4M hydrogen chloride solution in dioxane at ambient temperature. The resulting mixture was concentrated and dried in vacuo to afford the hydrogen chloride salt of the title compound as a white solid (355 mg, quant); 1H NMR (400 MHz, DMSO-d6): δ 1.83 (d, 2H, J=14.0 Hz), 2.66-2.74 (m, 2H); 3.44-3.51 (m, 4H); 3.75 (s, 3H); 4.21 (d, 1H, J=4.4 Hz); 4.84 (d, 1H, J=4.8 Hz); 5.93 (s, 1H); 6.85 (t, 1H, J=7.2 and 7.6 Hz); 6.95 (d, 2H, J=8 Hz); 7.21-7.25 (m, 2H); 7.39-7.45 (m, 4H); 7.53 (s, 1H); 8.97-9.04 (m, 2H); MS for C22H25N3O3 m/z 380.03 (M+H)+.

Workup

  1. concentrationThe resulting mixture was concentrated
  2. customdried in vacuo

Sources & evidence

ORD record
ord-1d180085ad6747078aa450f1afd6e1c9
Source dataset
uspto-grants-2015_10
Patent number
US09156840B2

Reaction notes

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