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CAS No. : | 790667-91-3 | MDL No. : | MFCD21607787 |
Formula : | C11H21NO3 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | RCXJVQLRZJXWNM-DTWKUNHWSA-N |
M.W : | 215.29 | Pubchem ID : | 45097441 |
Synonyms : |
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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 |
---|---|---|
30%; 52% | With sodium tetrahydroborate; In ethanol; for 2h; | Combine 2-METHYL-4-OXO-PIPERIDINE-1-CARBOXYLIC acid tert-butyl ester isomer l (10.0 g, 46.89 mmol), absolute ethanol (200 mL), and sodium borohydride (2.66 g, 70.33 mmol) with stirring. After 2 hr. , concentrate the reaction mixture and then partition the residue between water (100 mL) and 1 : 1 hexane: ethyl acetate (100 mL). Separate the aqueous layer and wash with 1: 1 hexane: ethyl acetate (4X100 mL), combine the organic layers, wash with aqueous NACI solution, dry over sodium sulfate, filter and concentrate. Purify the residue by silica gel flash chromatography eluting with 7: 3 hexane : ethyl acetate to obtain the resolved trans isomer 1 (3.03 g, 30%) and cis isomer 1 (5.2 g, 52%). Trans isomer 1 :'H NMR (CDCl3) : 4.5 (m, 1H), 4.05 (m, 1H), 3.95 (M, 1H), 2.9 (M, 1H), 1.9 (m, 1H), 1.8 (m, 1H), 1.5 (m, 1H), 1.45 (s, 9H), 1.4 (m, 1H), 1.35 (m, 1H), 1.1 (d, 3H). cis isomer 1 :] H NMR (CDC13) : 4.25 (m, 1H), 4.15 (M, 1H), 3.8 (m, 1H), 3.25 (m, 1H), 1.8 (M, 1H), 1.65 (m, 3H), 1. 4 (s, 9H), 1.3 (d, 3H). |
41%; 49% | With methanol; sodium tetrahydroborate; In tetrahydrofuran; at 0℃; for 1h; | General procedure: A flask was charged with t-butyl (3aR,6aS)-5-oxohexahydrocyclopenta[c]pyrrole-2(lH)- carboxylate (1.00 g, 4.44 mmol, 1.00 equiv) and MeOH (15 mL). Sodium borohydride (0.507 g, 13.4 mmol, 3.00 equiv) was added at 0 C. The resulting solution was stirred for 2 h at room temperature and quenched with water (20 mL). The resulting solution was extracted with DCM (3 x 30 mL) and the organic layers were combined, washed with brine (1 x 50 mL), dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to provide 0.950 g (94% yield) of t-butyl tra5-5-hydroxyhexahydrocyclopenta[c]pyrrole-2(lH)-carboxylate as a yellow oil. LCMS (ESI, m/z): 228 [M+H]+. |
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