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

HRID 1750970Notes

Reaction equation

HRID 1750970 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 66652137(S)-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 66652128(S)-methyl 2-(4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)-2-phenylacetateYield 109%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Procedure

Deprotection of (S)-tert-butyl 3-(2-methoxy-2-oxo-1-phenylethyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decane-8-carboxylate (183 mg, 0.382 mmol, 1 equiv) was accomplwashed in 3 hours in the presence of 4M hydrochloric acid 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 (158 mg, quant); 1H NMR (400 MHz, DMSO-d6): δ 1.82 (d, 2H, J=14.4 Hz), 2.67-2.77 (m, 2H); 2.93 (bs, 1H); 3.35-3.39 (m, 2H); 3.75 (s, 3H); 4.21 (d, 1H, J=4.8 Hz); 4.84 (d, 1H, J=4.4 Hz); 5.93 (s, 1H); 6.84 (t, 1H, J=7.2 Hz); 6.96 (d, 2H, J=8 Hz); 7.21-7.25 (m, 2H); 7.41-7.47 (m, 4H); 7.53 (s, 1H); 9.06 (bs, 1H); 9.14 (bs, 1H); MS for C22H25N3O3 m/z 380.01 (M+H)+.

Workup

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

Sources & evidence

ORD record
ord-e72751f9bf55411da6d62e46e30c21d8
Source dataset
uspto-grants-2015_10
Patent number
US09156840B2

Reaction notes

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