Aluminium lithium hydride → HCID 11426012, compound

Temperature

65 °C

To an argon purged 250 mL round bottom flask fitted with condenser and magnetic stirbar containing 53 (1.283 g, 4.35 mmol) was added lithium aluminum hydride (412 mg, 10.86 mmol). Anhydrous tetrahydrofuran (15 mL) was added resulting in gas formation. The flask was placed in an oil bath and heated to 65° C. and stirred for 16 hours under argon. The reaction was cooled to room temperature and quenched with water (1.1 mL), 3N sodium hydroxide (1.7 mL) and water (3.3 mL) sequentially. The mixture was filtered to remove the white solid and the pale yellow filtrate concentrated to afford a pale yellow oil. Drying under high vacuum afforded a pale yellow solid, compound 54. Yield: 1.193 g of pale yellow solid (97.5%). 1H NMR (DMSO) δ 7.65-7.64 (d, 1H, J=1.5), 7.30-7.27 (d, 1H, J=8.7 Hz), 7.167 (s, 1H), 7.14-7.09 (q, 1H, J=6.9, 8.4 Hz), 2.67-2.62 (t, J=7.5, 2H), 2.25-2.20 (t, J=7.5 Hz, 2H), 2.12 (s, 8H).

1. customTo an argon purged 250 mL round bottom flask
2. customfitted with condenser
3. customresulting in gas formation
4. customThe flask was placed in an oil bath
5. temperatureThe reaction was cooled to room temperature
6. customquenched with water (1.1 mL), 3N sodium hydroxide (1.7 mL) and water (3.3 mL) sequentially
7. filtrationThe mixture was filtered
8. customto remove the white solid
9. concentrationthe pale yellow filtrate concentrated
10. customto afford a pale yellow oil
11. customDrying under high vacuum

ORD record

ord-b32cb989d13544f39eab66034eb574c8

Source dataset

uspto-grants-2008_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07375219B2