Ethanolamine → HCID 11053841, compound

Dissolve B-(2-(trimethylsilyl)ethynyl)-9-borabicyclo[3.3.1]nonane.tetrahydrofuran complex (2.13 g, 7.3 mmol) in pentane (25 mL) and add (2R)-2-methyl-2-methoxyhexanal (1.06 g, 7.3 mmol). Stir at room temperature for 72 hours. Remove the solvent under a positive nitrogen pressure to give a yellow solid. Add ethyl ether (30 mL) and methanol (500 μL). Cool to 0° C. and add, by dropwise addition, ethanolamine (440 μL, 7.3 mmol). Stir overnight, centrifuge the reaction mixture and separate the clear supernatant liquid. Wash the precipitate with pentane (2×10 mL) and combine the organic phases. Wash with water (2×25 mL) and dry (MgSO4). Evaporate the solvent in vacuo and purify by silica gel chromatography (19:1 hexane/ethyl acetate) to give (3S,4R)-4-methoxy-4-methyl-l-trimethylsilyl-1-octyn-3-ol as a clear liquid (900mg, 51%).

1. customRemove the solvent under a positive nitrogen pressure
2. customto give a yellow solid
3. temperatureCool to 0° C.
4. stirringStir overnight
5. customcentrifuge the reaction mixture and separate the clear supernatant liquid
6. washWash the precipitate with pentane (2×10 mL)
7. washWash with water (2×25 mL)
8. dry with materialdry (MgSO4)
9. customEvaporate the solvent in vacuo
10. custompurify by silica gel chromatography (19:1 hexane/ethyl acetate)

ORD record

ord-adea1d90fad348748066b4f315dae579

Source dataset

uspto-grants-1992_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05110966