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CAS No. : | 188715-40-4 | MDL No. : | MFCD01862347 |
Formula : | C23H25NO4 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | MLMIBGARTUSGND-UHFFFAOYSA-N |
M.W : | 379.45 | Pubchem ID : | 2756125 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
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 |
---|---|---|
83% | Stage #1: With sodium carbonate In 1,4-dioxane; water at 20℃; for 2.5 h; Stage #2: With hydrogenchloride In 1,4-dioxane; water |
Step 1: Dissolve 4-Aminomethyl-cyclohexanecarboxylic acid ((39); 1.15g, 7.30mmol) in 1,4-dioxane (12.0mL) and 10percent aqu. Na2CO3 (23.2mL) and add Fmoc-Cl (2.26g, 8.76mmol). Stir the reaction mixture for 2.5h at rt. Add 1M aqu HCl (42.0mL) to the mixture and extract with EtOAc (3 times). Wash the combined organic layers with 1M aqu HCl, water and brine, extract the combined aqu layers once again with EtOAc, dry the combined organic layers with Na2SO4 and remove solvent under reduced pressure. The left crude product is washed with ice cold EtOAc and dried in oil pump vacuum to obtain (40) as a white solid (2.28g, 83percent). No further purification. [M. Nichifor; E. H. Schacht; Tetrahedron;1994; 50; 12; 3747-3760]. 1H NMR (400MHz, CDCl3): 0.87-1.02 (br.m, 2 H); 1.34-1.52 (br.m, 4 H); 1.81 (br.d, 2 H, J 6Hz); 1.90-2.11 (br.s, 1 H); 2.12-2.35 (br.m, 1 H); 3.03 (Ψt, 2 H, J = 6.2Hz); 4.19 (br.Ψt, 1 H, J = 6.5Hz); 4.42 (br.Ψd, 2 H, J = 6.5Hz); 4.74 (br.s, 1 H); 7.30 (Ψt, 2 H, J = 7.4Hz); 7.38 (Ψt, 2 H, J = 7.4Hz); 7.57 (d, 2 H, J = 7.4Hz); 7.75 (d, 2 H, J = 7.4Hz). |
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