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CAS No. : | 6089-09-4 | MDL No. : | MFCD00004407 |
Formula : | C5H6O2 | Boiling Point : | - |
Linear Structure Formula : | CHCCH2CH2COOH | InChI Key : | MLBYLEUJXUBIJJ-UHFFFAOYSA-N |
M.W : | 98.10 | Pubchem ID : | 22464 |
Synonyms : |
Propargylacetic acid
|
Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P280-P305+P351+P338-P310 | UN#: | 3261 |
Hazard Statements: | H314 | Packing Group: | Ⅱ |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
81% | General procedure: 4-Pentynoic acid (1.38 g, 14.01 mmol, 1 equiv.) was dissolved in DCM (2mL) then added to an ice-cold solution of EDC (4.026 g, 21 mmol, 1.5 equiv.) and HOBt (2.649 g, 19.59 mmol, 1.4 equiv.) in DCM (25mL). A solution of appropriate 2-naphthylamine (21 mmol, 1.5 equiv.) in DCM (20mL) was then added to the reaction mixture and stirred. Triethylamine (2.13 g, 21 mmol, 1.5 equiv.) was added drop-wise over 10 min. then the reaction temperature was allowed to increase gradually to room temperature. The reaction mixture was stirred for 17 h. The reaction mixture was then diluted with 20 ml DCM, washed with water, 5percent aq. HCl, saturated Aq. sodium bicarbonate solution, and brine solution. The organic layer was dried over anh. sodium sulfate, filtered and the solvent was evaporated under reduced pressure. The crude was purified by column chromatography to afford the corresponding N-(naphthalen-2-yl)pent-4-ynamides. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
General procedure: To a solution of 5-hexynoic acid (3.0 mmol) in dryCH2Cl2 (5 mL) was added EDCI (3.1 mmol) and HOBt(3.1 mmol). The resulting mixture was stirred at rt for 2 h. Then substituted or unsubstituted 2-aminobenzamide (3.0 mmol) wasadded, and the reaction mixture was stirred at rt for 12 h whilebeing monitored by TLC. After the addition of H2O (10 mL) themixture was extracted with ethyl acetate (3 × 20 mL). Theorganic layers were combined and concentrated under vacuumto give the amide intermediate. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
General procedure: To a solution of 5-hexynoic acid (3.0 mmol) in dryCH2Cl2 (5 mL) was added EDCI (3.1 mmol) and HOBt(3.1 mmol). The resulting mixture was stirred at rt for 2 h. Then substituted or unsubstituted 2-aminobenzamide (3.0 mmol) wasadded, and the reaction mixture was stirred at rt for 12 h whilebeing monitored by TLC. After the addition of H2O (10 mL) themixture was extracted with ethyl acetate (3 × 20 mL). Theorganic layers were combined and concentrated under vacuumto give the amide intermediate. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With dmap; dicyclohexyl-carbodiimide; In dichloromethane; at 20℃; | General procedure: Esterification of <strong>[5957-80-2]carnosol</strong>, carnosic acid and carnosic acid methyl ester was performed using DCC/DMAP and appropriate acid (4-pentynoic acid or 5-hexynoic acid) according to references [22,23]. Briefly, alkynyl acid (1 eq) was dissolved in dry CH2Cl2 at room temperature under constant stirring. Then, DCC (1 eq) was added, followed by a catalytic amount of DMAP and the corresponding terpene (0.5 eq) dissolved in dry CH2Cl2. The reaction was stopped by adding H2O, extracted with CH2Cl2, dried over Na2SO4, concentrated and purified (58%-76% yield). |
[ 933755-97-6 ]
1-Ethynylcyclopropanecarboxylic acid
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