Propanoic acid, 3-amino-2,2-dimethyl-3-oxo-, ethyl ester synthesis
- Product Name:Propanoic acid, 3-amino-2,2-dimethyl-3-oxo-, ethyl ester
- CAS Number:81891-82-9
- Molecular formula:C7H13NO3
- Molecular Weight:159.18
1572-98-1
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81891-82-9
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Yield:-
Reaction Conditions:
Stage #1: 2-cyano-2-methyl-propionic acid ethyl esterwith sulfuric acid;water in ethanol at 20; for 16 h;
Stage #2: with sodium hydrogencarbonate in ethanol;water;
Steps:
115.A
Intermediate 115; 2-Methyl-2- [4- (4-trifluoromethyl-phenyl) oxazol-2-yl] -propan-1-ol; Step A; Cyano-dimethyl-acetic acid ethyl ester (3 g, 21.2 mmol) is dissolved in EtOH (5 mL) , then concentrated H2SO4 (20 mL) is added and the mixture is stirred at rt for 16 h. The reaction is poured into water (100 mL) and NaHCO3 is added portionwise to neutral pH. Then the mixture is extracted with EtOAc (3 x 60 mli) . The organic layers are combined and washed with brine, dried (MgSO4) , filtered and evaporated to afford 2 , 2-dimethyl-malonamic acid ethyl ester 113 as a clear oil. 1H-NMR (400MHz, CDCl3) 4.11 (q, J = 7.2 Hz, 2H), 1.38 (S, 6H) , 1.20 (t, J" = 7.2 Hz, 3H) .
References:
WO2007/56366,2007,A2 Location in patent:Page/Page column 74-75
5471-77-2
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81891-82-9
7 suppliers
$45.00/50mg