Reaktion #609977

Reaktionsgleichung

compound 2

tert-butyl (6-hydroxyhexyl)carbamate

Ph3P

CBr4

→

compound 3

Ausbeute 78.0%

tert-butyl(6-bromohexyl)carbamate

Ausbeute 78.0%

Lösungsmittel

toluene

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionextracted with EtOAc (3×60 mL)
2. 2
   TrocknenThe combined organic extracts were dried over Na2SO4
3. 3
   Filtrationfiltered
4. 4
   Einengenconcentrated in vacuo
5. 5
   Sonstigeto obtain the crude
6. 6
   SonstigeThe crude was purified (silica gel; 20% EtOAc/hexanes)

Vorschrift

To a stirred solution of compound 2 (1 g, 4.61 mmol) in toluene (30 mL) were added Ph3P (1.81 g, 6.91 mmol) and CBr4 (2.29 g, 6.91 mmol) at RT under inert atmosphere and stirred for 3 h. The mixture was diluted with water (50 mL) and extracted with EtOAc (3×60 mL). The combined organic extracts were dried over Na2SO4, filtered and concentrated in vacuo to obtain the crude. The crude was purified (silica gel; 20% EtOAc/hexanes) to afford compound 3 (1 g, 78%) as colorless oil. 1H NMR (400 MHz, CDCl3): δ 4.51 (br s, 1H), 3.40 (t, J=6.8 Hz, 2H), 3.13-3.08 (m, 2H), 1.89-1.82 (m, 2H), 1.52-1.42 (m, 13H), 1.37-1.31 (m, 2H).

Quelle