Hydrochloric Acid → HCID 178442850, compound
Reaction equation
Cl.[NH2:2][OH:3].[OH-].[Na+].[C:6]([O:26]CC)(=O)[C:7]#[C:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH3:24].Cl>C(O)C>[OH:26][C:6]1[CH:7]=[C:8]([CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH3:24])[O:3][N:2]=1Participants
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Procedure
13.24 g of hydroxylamine hydrochloride were added to a mixture of 130 ml of a 10% w/v aqueous solution of sodium hydroxide and 100 ml of ethanol, whilst ice-cooling. A solution of 5.08 g of ethyl 2-nonadecynoate (prepared as described in Preparation 31) in ethanol (30 ml) was then added dropwise to the resulting mixture, which was then stirred at room temperature for 16 hours. The mixture was then adjusted to a pH value of 3 by adding concentrated hydrochloric acid, and then the mixture was extracted three times with diethyl ether. The combined extracts were washed with water, dried and concentrated by evaporation under reduced pressure. The residue was subjected to column chromatography through 50 g of silica gel. 4.09 g of the title compound were isolated from the fractions eluted with a 1:1 by volume mixture of methylene chloride and hexane, to give crystals melting at 85°-86° C. (from cold diethyl ether).
Workup
- temperaturecooling
- extractionthe mixture was extracted three times with diethyl ether
- washThe combined extracts were washed with water
- customdried
- concentrationconcentrated by evaporation under reduced pressure
Sources & evidence
- ORD record
- ord-3664a42343f748bc9f019ff1d7084653
- Source dataset
- uspto-grants-1991_11
- Patent number
- US05068340
Reaction notes
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