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5-benzyloxyiminopiperidine-2S-carboxylic acid ethyl ester


oxalic acid

![ethyl (2S,5R)-5-[(benzyloxy)amino]piperidine-2-carboxylate oxalic acid salt](/upload/2024/4/2e5e891a-7618-4219-8e73-4e89fac893e0.png)
ethyl (2S,5R)-5-[(benzyloxy)amino]piperidine-2-carboxylate oxalic acid salt
| Conditions | Yield |
|---|---|
|
5-benzyloxyiminopiperidine-2S-carboxylic acid ethyl ester; With sulfuric acid; In ethyl acetate; at -20 - -15 ℃; for 1h;
With sodium tris(acetoxy)borohydride; In ethyl acetate; at -20 - -15 ℃; for 5h;
oxalic acid; In methanol; ethyl acetate; at 45 ℃; for 2h;
|
65.4% |
|
5-benzyloxyiminopiperidine-2S-carboxylic acid ethyl ester; With sodium tetrahydroborate; sulfuric acid; propionic acid; In ethyl acetate; at -20 ℃;
With ammonia; In water; ethyl acetate;
oxalic acid; In ethanol; at 40 - 45 ℃;
|

ethanol


(2S,5R)-5-benzyloxyaminopiperidin-2-carboxylic acid benzyl ester oxalic acid salt


sodium ethanolate


oxalic acid

![ethyl (2S,5R)-5-[(benzyloxy)amino]piperidine-2-carboxylate oxalic acid salt](/upload/2024/4/2e5e891a-7618-4219-8e73-4e89fac893e0.png)
ethyl (2S,5R)-5-[(benzyloxy)amino]piperidine-2-carboxylate oxalic acid salt
| Conditions | Yield |
|---|---|
|
ethanol; (2S,5R)-5-benzyloxyaminopiperidin-2-carboxylic acid benzyl ester oxalic acid salt; sodium ethanolate; at 0 ℃; for 1h;
oxalic acid; In ethyl acetate; acetone; at 35 ℃;
|
94% |

ethanol

(2S,5R)-5-benzyloxyaminopiperidin-2-carboxylic acid benzyl ester oxalic acid salt

sodium ethanolate

oxalic acid

(2S,5R)-1,6-diazabicyclo[3.2.1]octane-2-carboxamide 7-oxo-6-(sulfoxy)monosodium salt

({[(2S,5R)-2-carbamoyl-7-oxo-6-(sulfooxy)-1,6-diazabicyclo[3,2,1]-oct-6-yl]oxy}sulfonyl)tetrabutylammonium salt

(2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octan-2-carboxylic acid ethyl ester

(2S,5R)-2-carbamoyl-7-oxo-1,6-diazabicylco[3.2.1]octan-6-yl hydrogensulfate
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