Water → 4-(4-Chlorobutyl)pyridine

Temperatur

45 °C

4-Methylpyridine (8.4 g, 90 mmol) and THF (40 mL) were mixed in dry glassware, flushed with nitrogen and cooled to −60° C. n-BuLi (1.6 M solution, 61.9 mL, 99 mmol) was added dropwise over 1.5 h. The temperature was not allowed to exceed −50° C. The mixture was then allowed to reach rt, THF (20 mL) was added and the mixture was then stirred at 45° C. for 2 h. Additional THF (20 mL) was added. This mixture was cooled to 0° C. and added dropwise through a cooled dropping funnel to a 65° C. solution of 3-bromo-1-chloropropane (14.9 g, 94.5 mmol) in THF (15 mL). The reaction mixture was slowly allowed to reach 0° C. overnight. Water (90 mL) was added, and the mixture was stirred for 10 min. The organic layer was separated and dried (Na2SO4) to give the sub-title compound in 97.6% yield.

1. customflushed with nitrogen
2. additionwas added dropwise over 1.5 h
3. customto exceed −50° C
4. customto reach rt
5. temperatureThis mixture was cooled to 0° C.
6. additionadded dropwise through a cooled
7. customto a 65° C.
8. waitto reach 0° C. overnight
9. stirringthe mixture was stirred for 10 min
10. customThe organic layer was separated
11. dry with materialdried (Na2SO4)

ORD-Eintrag

ord-f5e22e81f52141c891eddf73a8cf2094

Quelldatensatz

uspto-grants-2010_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07772229B2