2-Oxobutanoic Acid → HCID 13505570, compound

HRID 1719177Notes

Reaction equation

HRID 1719177 reaction equation
O=[C:2]([CH2:6][CH3:7])[C:3]([OH:5])=[O:4].[CH2:8]([C:10]1([CH2:16][CH3:17])[CH2:12][CH:11]1[C:13]([NH2:15])=[O:14])[CH3:9].C1(C)C=CC=CC=1>O>[CH2:8]([C:10]1([CH2:16][CH3:17])[CH2:12][CH:11]1[C:13]([NH:15]/[C:2](=[CH:6]\[CH3:7])/[C:3]([OH:5])=[O:4])=[O:14])[CH3:9]

Participants

5

Reactant 3

HCID 582-Oxobutanoic AcidHCID 1140TolueneHCID 2409772,2-Diethylcyclopropane-1-carboxamide

Product 1

HCID 13505570HCID 13505570, compoundYield 9.7%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A mixture of 2.3 g of 2-ketobutyric acid, 2.0 g of 2,2-diethylcyclopropanecarboxamide, and 25 ml of toluene was heated under reflux for 16 hrs with removal of H2O by a modified Dean-Stark trap containing molecular sieves (4A). No product precipitated upon cooling. Ether (25 ml) was addd and the mixture was extracted with saturated NaHCO3 (3 times). The combined extracts were acidified with concentrated HCl. The gummy precipitate crystallized when triturated with water. Recrystallization from ethyl acetate gave 0.31 g of product, m.p. 129°-130°. The NMR spectrum was consistent with the desired structure.

Workup

  1. temperaturewas heated
  2. customNo product precipitated
  3. temperatureupon cooling
  4. extractionthe mixture was extracted with saturated NaHCO3 (3 times)
  5. customThe gummy precipitate crystallized when
  6. customtriturated with water
  7. customRecrystallization from ethyl acetate

Sources & evidence

ORD record
ord-dea0c0c2e3d14255bda8490e91d97109
Source dataset
uspto-grants-1985_09
Patent number
US04539208

Reaction notes

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