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CAS No. : | 27486-87-9 | MDL No. : | MFCD00236747 |
Formula : | C24H23NO3S | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | KCVPASSMLHHOIF-QFIPXVFZSA-N |
M.W : | 405.51 | Pubchem ID : | 7408363 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | |
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 |
---|---|---|
In N,N-dimethyl-formamide; at 20℃; | N-Acetyl-cysteine (100.0 g, 613 mmol) was dissolved in DMF (600 mL) andtriphenylmethyl chloride (179.4 g, 643 mmol) was added and the reaction mixture was stirred at room temperature overnight. The mixture was diluted with water andextracted twice with ethyl acetate. The combined organic layers were washed withbrine, dried over sodium sulfate and filtered. The solvent was removed in vacuo to givecompound 2-1. lodoethane (144.3 g, 925 mmol) was added to a suspension of 2-1(250.0 g, 617 mmol) and K2003 (170.4 g, 1233 mmol) in DMF (1250 ml). The reaction mixture was stirred at room temperature overnight then diluted with ice-water andextracted twice with ethyl acetate. The combined organic layers were washed withwater, brine, dry over sodium sulfate and filtered. The solvent was removed from the filtrate in vacuo to give compound 2-2. TFA (480 mL) was added to a solution of 2-2 (240 g, 554 mmol) and triethylsilane (128.7 g, 1107 mmol) in dichloromethane (2.4 L) at 0 00 and the reaction mixture allowed to stir at room temperature overnight. Thesolvent was removed in vacuo and compound 2-3 isolated by column chromatography. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With acetic acid; at 20℃; for 1h; | General procedure: Acetic anhydride (6.6 mmol) was added to a stirred solutionof alkylated cysteine derivatives (5.5 mmol) in acetic acid (11.1 mL) and the reaction mixture was left under stirring at room temperature for 1 h. The solvent was removed under vacuum giving the corresponding N-acetylated amino acids which were used without further purification. |
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