Water → 2-(2-Hexyldecyl)thiophene

Temperature

-78 °C

A solution of thiophene (46.4 g, 551 mmol., 2.50 equiv.) and THF (300 mL) was cooled to −78° C. n-Butyllithium (2.5 M in hexanes, 212 mL, 528 mmol., 2.40 equiv.) was added over 1 hour. The mixture was stirred for an additional 30 minutes at −78° C. before a solution of 1-iodo-2-hexyldecane (90.0 g, 220 mmol., 1.00 equiv) in THF (200 mL) was added slowly over 1 hour. After stirring for 1 hour at −78° C., the reaction mixture was warmed to ambient temperature and stirred for 18 hours. Water (200 mL) was added and the organic material was extracted with Et2O (3×250 mL), washed with additional water, dried over Na2SO4, filtered, and concentrated in vacuo. The resulting brown residue was purified by silica gel column chromatography (hexanes) to give a pale yellow oil (52.03 g, 77% yield). 1H NMR (500 MHz, CDCl3) δ 7.12 (dd, J=5.2, 1.2 Hz, 1H), 6.92 (m, 1H), 6.76 (dd, J=3.4, 0.9 Hz, 1H), 2.76 (d, J=6.7, 2H), 1.62 (b, 1H), 1.33-1.21 (m, 24H), 0.91-0.87 (m, 6H).

1. additionwas added over 1 hour
2. additionwas added slowly over 1 hour
3. temperaturethe reaction mixture was warmed to ambient temperature
4. stirringstirred for 18 hours
5. extractionthe organic material was extracted with Et2O (3×250 mL)
6. washwashed with additional water
7. dry with materialdried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated in vacuo
10. customThe resulting brown residue was purified by silica gel column chromatography (hexanes)

ORD record

ord-24d8625866924b818ea5da32036bded2

Source dataset

uspto-grants-2014_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08883958B2