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CAS No. : | 4743-17-3 | MDL No. : | MFCD00006701 |
Formula : | C8H4ClNO3 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | MYQFJMYJVJRSGP-UHFFFAOYSA-N |
M.W : | 197.58 | Pubchem ID : | 78480 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | 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 methanol; acetic acid; N,N-dimethyl-formamide; | a) 59.3 g (0.3 mol) of 5-chloro-isatoic anhydride and 30.3 g (0.3 mol) of (S)-azetidine-2-carboxylic acid were suspended in 400 ml of N,N-dimethylformamide/acetic acid 5:1 and heated to 87-90 in an oil bath under argon for 64 hrs. The solvent was removed in a vacuum and the residue was taken up in 500 ml of methanol, whereupon the mixture was stirred at room temperature for 30 min. The white, pure crystals were filtered off under suction. The solvent was removed in a vacuum and the semi-crystalline residue was recrystallized from 60 ml of methanol (hot filtration). The products were combined and dried in a vacuum. There were obtained 61.3 g (86%) of (S)-6-chloro-1,2,4,9,10,10a-hexahydro-azeto[2,1-c][1,4]benzodiazepine-4,10-dione of m.p. 229-231 (dec.). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
19.8% | With pyridine; at 120℃; for 18h; | 5-chloroisatoic anhydride (compound 18) (1 g, 5.06 mmol) and <strong>[2886-33-1]L-aspartic acid dibenzyl ester p-toluenesulfonate salt</strong> (6) (2.98 g, 6.13 mmol) are suspended inpyridine (20 mE) to form a suspended solution, and the suspended solution is heated to 120C. and dissolved completely and reacted for 18 hours. After 18 hours, the reaction solution is cooled to room temperature, and drops of 6N HC1 are added gradually to acidiFy the reaction solution to a pH value approximately equal to 1. The acidified reaction solution is extracted by ethyl acetate (50 mEx3), and the combined organic layer is washed by saturated salt water, and then anhydrous magnesium sulfate is used for drying and filtering. The filtered solution is concentrated to obtain a crude product, and then the crude product is re-crystallized by ethyl acetate and water to obtain the final white solid product which is the compound 78 (0.36 g, 19.8%). Analysis Data of Compound 7B ?H-NMR (300 MHz, DMSO-d5): oe 2.80 (dd, 1H),2.95 (dd, 1H), 4.10 (ddd, 1H), 5.05 (s, 2H), 7.10 (d, 1H), 7.33 (m, 5H), 7.60 (dd, 1H), 7.70 (d, 1H), 8.76 (dd, 1H), 10.60 (s, NH); ?3C-NMR(75 MHz, DMSO-d5): oe 171.0, 170.3, 166.1, 136.4, 135.9, 132.7, 130.2, 129.0, 128.7, 128.4, 128.2, 128.1,121.6, 66.0, 49.0, 33.0 |
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