Potassium Carbonate → Tert-butyl 3-((8-((2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate

HRID 1751028Notes

Reaction equation

HRID 1751028 reaction equation
[O:1]=[C:2]1[C:6]2([CH2:11][CH2:10][NH:9][CH2:8][CH2:7]2)[N:5]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH2:4][N:3]1[CH2:18][C:19]1[CH:20]=[C:21]([CH:29]=[CH:30][CH:31]=1)[C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23].C(=O)([O-])[O-].[K+].[K+].Br[CH2:39][CH:40]1[O:45][C:44]2[CH:46]=[CH:47][CH:48]=[CH:49][C:43]=2[O:42][CH2:41]1>CN(C)C=O>[O:45]1[CH:40]([CH2:39][N:9]2[CH2:10][CH2:11][C:6]3([N:5]([C:12]4[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=4)[CH2:4][N:3]([CH2:18][C:19]4[CH:20]=[C:21]([CH:29]=[CH:30][CH:31]=4)[C:22]([O:24][C:25]([CH3:28])([CH3:26])[CH3:27])=[O:23])[C:2]3=[O:1])[CH2:7][CH2:8]2)[CH2:41][O:42][C:43]2[CH:49]=[CH:48][CH:47]=[CH:46][C:44]1=2

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 983332-Bromomethyl-1,4-benzodioxaneHCID 58046667Tert-butyl 3-((4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate

Product 1

HCID 58046715Tert-butyl 3-((8-((2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoateYield 54.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
55 °C

Procedure

To a solution of tert-butyl 3-((4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate (0.23 g, 0.55 mmol) and potassium carbonate (0.114 g, 0.83 mmol) in N,N-dimethylformamide (5 mL), was added 2-(bromomethyl)-2,3-dihydrobenzo[b][1,4]dioxine (0.082 mL, 0.55 mmol, d=1.533). After stirring at 55° C. for 18 hours, the reaction mixture was filtered, concentrated and isolated by preparatory TLC (7% methanol/dichloromethane) to obtain the title compound (0.17 g, 54%); 1H NMR (DMSO-d6): δ 1.52 (s, 9H), 1.63 (d, 2H, J=12 Hz), 2.54-2.60 (m, 2H), 2.65 (d, 2H, J=6 Hz), 2.81-2.93 (m, 6H), 3.99-4.04 (m, 1H), 4.37 (dt, 2H, J=10.4 and 2.4 Hz), 4.60 (d, 2H, J=11.2 Hz), 6.76-6.88 (m, 7H), 7.23 (t, 2H, J=8.8 Hz), 7.48-7.55 (m, 2H), 7.79 (m, 1H), 7.83 (dt, 1H, J=7.2 and 2 Hz); MS for C34H39N3O5 m/z 570.12 (M+H)+.

Workup

  1. filtrationthe reaction mixture was filtered
  2. concentrationconcentrated
  3. customisolated by preparatory TLC (7% methanol/dichloromethane)

Sources & evidence

ORD record
ord-5a7e119ec5d349b29e3019369b149d1e
Source dataset
uspto-grants-2015_10
Patent number
US09156840B2

Reaction notes

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