Tributyltin Chloride → HCID 71143878, compound

Temperature

-78 °C

To a cold (−78° C.) solution of thieno[3,2-c]pyridine (2.000 g, 14.79 mmol) in anhydrous THF (50 mL) was added n-butyllithium (10.17 mL, 16.27 mmol) dropwise. The reaction mixture was stirred at −78° C. for 60 minutes. A solution of tributylchlorostannane (4.79 mL, 17.75 mmol) in anhydrous THF (10 mL) was added. The reaction mixture was stirred at −78° C. for 30 minutes and the solution was allowed to warm to room temperature over a period of 2 to 3 hours. Saturated aqueous NaHCO3 was added. The aqueous phase was extracted with ether (3×200 mL). The organic layers were combined, dried over anhydrous sodium sulfate, filtered, and evaporated in vacuo. The crude product was purified by silica gel column chromatography, eluting with a gradient of 10-50% EtOAc and hexane over a period of 60 minutes. The desired fractions were collected to give the title compound as a clear oil (4.2 g, 67%). 1H NMR (500 MHz, DMSO-d6) δ ppm 0.79-0.94 (m, 9H), 1.10-1.24 (m, 6H), 1.32 (sextet, J=7.32 Hz, 6H), 1.51-1.66 (m, 6H), 7.63-7.70 (m, 1H), 8.04 (d, J=5.37 Hz, 1H), 8.35 (d, J=5.86 Hz, 1H), 9.16 (d, J=0.98 Hz, 1H).

1. stirringThe reaction mixture was stirred at −78° C. for 30 minutes
2. temperatureto warm to room temperature over a period of 2 to 3 hours
3. extractionThe aqueous phase was extracted with ether (3×200 mL)
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationfiltered
6. customevaporated in vacuo
7. customThe crude product was purified by silica gel column chromatography
8. washeluting with a gradient of 10-50% EtOAc and hexane over a period of 60 minutes
9. customThe desired fractions were collected

ORD record

ord-fa6b1437158b4f638a1babe34d43f7cc

Source dataset

uspto-grants-2015_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09056873B2