Structure of 258332-57-9
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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CAS No. : | 258332-57-9 |
Formula : | C12H24N2O4 |
M.W : | 260.33 |
SMILES Code : | O=C(OCC)CNCCCNC(OC(C)(C)C)=O |
MDL No. : | MFCD06797071 |
InChI Key : | IUZPINCLTDROJL-UHFFFAOYSA-N |
Pubchem ID : | 44630168 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
* 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: Tert-butyl (5-aminoethyl)carbamate (11.7 g) was dissolved in THF (110 mL), and then Et3N (16 mL, 3.0 equiv) was added to the solution under stirring. The mixture was kept at room temperature (rt) for 10 min. Ethyl bromoacetate (12.24 mL, 1 equiv) was dissolved in THF (100 mL) and added dropwise to the solution under stirring. The mixture was kept at rt for 16 h. The mixture was concentrated in vacuo, and then the residue redissolved in Et2O (300 mL) and filtered. The filtrate was concentrated in vacuo to afford the intermediate ethyl ester (17.65 g) as a colourless oil, which was dissolved in dioxane (100 mL) and MeOH (40 mL). Then, 4M NaOH (18 mL) was added dropwise under stirring. The mixture was kept at rt for 1 h, then concentrated in vacuo, and the residue redissolved in H2O (100 mL). Fmoc-OSu (23.69 g, 1 equiv) was dissolved in warm (45 C) MeCN (170 mL) and added dropwise to the mixture under stirring. The mixture was kept at rt for 16 h, then concentrated in vacuo until it turned turbid. Then EtOAc (300 mL) was added, and the resulting mixture was washed with 10% citric acid (400 mL). The aqueous phase was extracted with EtOAc (2 × 150 mL), and the combined organic phases were washed with H2O (3 × 250 mL), and brine (250 mL). The organic phase was extracted with 10% NaHCO3-10% Na2CO3-dioxane 3:3:2 (4 × 400 mL). The combined aqueous phases were adjusted to pH 2-3 with 4M HCl, extracted with EtOAc (150 mL), then combined, dried over Na2SO4and concentrated in vacuo. The resulting solid was recrystallised from EtOAc (200 mL) and heptane (800 mL) to afford building block17(25.0 g, 77.6%) as a white solid; tR= 6.53 min. (gradient 30-100% B during 10 min). |
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