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CAS No. : | 2459-05-4 | MDL No. : | MFCD00002699 |
Formula : | C6H8O4 | Boiling Point : | - |
Linear Structure Formula : | HOOCCHCHCOOC2H5 | InChI Key : | - |
M.W : | 144.13 | Pubchem ID : | - |
Synonyms : |
|
Chemical Name : | (E)-4-Ethoxy-4-oxobut-2-enoic acid |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | 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 |
---|---|---|
General procedure: All aza-peptidyl inhibitors and probes were synthesized by following the previously reported procedures 1, 2 with slight modifications. Fmoc protecting groups from Rink SS resin (0.75 mmol/g) were removed by treatment with 20percent piperidine in DMF for 15 min, followed by three washes with DMF. A 1.2 M solution of bromoacetic acid (10 eq) in NMP and DIC (10 eq) were added to the resin. The resin was shaken 1.5 hrs and washed three times. A solution of Mono-Fmoc protected hydrazide (3 eq) in NMP was added and shaken overnight. Resin loading was determined by Fmoc-quantification (0.2-0.3 mmol/g). A 0.5M solution of N-Fmoc-protected amino acid (3 eq.) and HOBt (3 eq.) in DMF and DIC (3 eq.) were added to the resin. The resin was shaken 1.5-2hrs. For each of the following steps, Fmoc-deprotection and coupling reactions were repeated as described above. Capping of N-terminal amine was achieved by shaking the resin with a 0.5 M solution of acetic anhydride (5 eq.) and DIEA (5 eq.) in DMF for 5 min. |
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