Acetic Acid → HCID 44243038, compound

HRID 1013090Notes

Reaction equation

HRID 1013090 reaction equation
OC(C(F)(F)F)=O.[NH2:8][C:9]1([C:32]([NH2:34])=[O:33])[CH2:14][CH2:13][N:12]([C:15]([C:17]2[C:18]3[CH:31]=[CH:30][CH:29]=[CH:28][C:19]=3[S:20][C:21]=2[NH:22][C:23]([NH:25][CH2:26][CH3:27])=[O:24])=[O:16])[CH2:11][CH2:10]1.C(O)(=O)C.[CH2:39]([O:41][C:42](OCC)([O:50]CC)[CH2:43][CH2:44][C:45](OCC)=O)[CH3:40]>C1(C)C=CC=CC=1.CN(C=O)C>[CH2:26]([NH:25][C:23](=[O:24])[NH:22][C:21]1[S:20][C:19]2[CH:28]=[CH:29][CH:30]=[CH:31][C:18]=2[C:17]=1[C:15]([N:12]1[CH2:11][CH2:10][C:9]2([N:8]=[C:45]([CH2:44][CH2:43][C:42]([O:41][CH2:39][CH3:40])=[O:50])[NH:34][C:32]2=[O:33])[CH2:14][CH2:13]1)=[O:16])[CH3:27]

Participants

6

Reactant 3

HCID 176Acetic AcidHCID 13452377Ethyl 4,4,4-triethoxybutanoateHCID 44243036HCID 44243036, compound

Product 1

HCID 44243038HCID 44243038, compoundYield 65%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
85 °C

Procedure

4-Amino-1-(2-(3-ethylureido)benzo[b]thiophene-3-carbonyl)piperidine-4-carboxamide (7, 100 mg, 1.0 equivalent) as prepared in Example 7 was dissolved in toluene (0.09 M) and DMF (0.26 M), and to which acetic acid (2.0 equivalents), and ethyl 4,4,4-triethoxybutanoate (4.0 equivalents) were added and the reaction mixture was heated to 85° C. for 9 hrs. The reaction mixture was then partitioned between ethyl acetate and water and the separated organics was washed with brine and dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by SiO2 chromatography (5%-10% MeOH/CH2Cl2 gradient) to afford ethyl 3-(8-(2-(3-ethylureido)benzo[b]thiophene-3-carbonyl)-4-oxo-1,3,8-triazaspiro[4.5]dec-1-en-2-yl)propanoate (10, 65%). Two rotamers observed (ratio 1.3:1).

Workup

  1. customThe reaction mixture was then partitioned between ethyl acetate and water
  2. washthe separated organics was washed with brine
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by SiO2 chromatography (5%-10% MeOH/CH2Cl2 gradient)

Sources & evidence

ORD record
ord-5c8e6aa685ce424e95a19a6b0660754c
Source dataset
uspto-grants-2011_07
Patent number
US07981904B2

Reaction notes

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