Trifluoroacetic acid → (5-Methylthiophen-2-yl)(1-oxa-4,9-diazaspiro[5.5]undecan-4-yl)methanone trifluoroacetate

HRID 1689209Notes

Reaction equation

HRID 1689209 reaction equation
[CH3:1][C:2]1[S:6][C:5]([C:7]([N:9]2[CH2:14][C:13]3([CH2:19][CH2:18][N:17](C(OC(C)(C)C)=O)[CH2:16][CH2:15]3)[O:12][CH2:11][CH2:10]2)=[O:8])=[CH:4][CH:3]=1.[F:27][C:28]([F:33])([F:32])[C:29]([OH:31])=[O:30]>C(Cl)Cl>[F:27][C:28]([F:33])([F:32])[C:29]([OH:31])=[O:30].[CH3:1][C:2]1[S:6][C:5]([C:7]([N:9]2[CH2:14][C:13]3([CH2:19][CH2:18][NH:17][CH2:16][CH2:15]3)[O:12][CH2:11][CH2:10]2)=[O:8])=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 57989101Tert-butyl 4-(5-methylthiophene-2-carbonyl)-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxylate

Product 1

HCID 67292300(5-Methylthiophen-2-yl)(1-oxa-4,9-diazaspiro[5.5]undecan-4-yl)methanone trifluoroacetate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

tert-Butyl 4-(5-methylthiophene-2-carbonyl)-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxylate u) (example 9, step a) (0.32 g) in DCM (3 mL) was treated with trifluoroacetic acid (1.0 g). After 2 h, the reaction mixture was evaporated in vacuo and azeotroped twice with toluene to yield the subtitled compound which was used directly. Yield 0.32 g.

Workup

  1. customthe reaction mixture was evaporated in vacuo
  2. customazeotroped twice with toluene

Sources & evidence

ORD record
ord-775c23e9d857488ebd5c4276ea78e8d1
Source dataset
uspto-grants-2012_04
Patent number
US08148373B2

Reaction notes

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