1,4-Dibromobutane → 1-Bromo-4-(4-isopentyloxy-butyloxy)-butane

反応式

[H-].[Na+].[CH2:3]([O:8][CH2:9][CH2:10][CH2:11][CH2:12][OH:13])[CH2:4][CH:5]([CH3:7])[CH3:6].[Br:14][CH2:15][CH2:16][CH2:17][CH2:18]Br.[Br-].[Na+]>>[Br:14][CH2:15][CH2:16][CH2:17][CH2:18][O:13][CH2:12][CH2:11][CH2:10][CH2:9][O:8][CH2:3][CH2:4][CH:5]([CH3:7])[CH3:6]

参加物

反応物 4

HCID 80561,4-Dibromobutane

HCID 24758Sodium hydride

HCID 253881Sodium Bromide

HCID 137211974-Isopentyloxy butanol

生成物 1

HCID 214340441-Bromo-4-(4-isopentyloxy-butyloxy)-butane

実験手順

1.77 g (0.041 mol) of 55% sodium hydride dispersion in oil are carefully added over the course of 40 minutes, under nitrogen and while stirring, to 26.0 g (0.163 mol) of 4-isopentyloxy-butanol. The mixture is stirred at 60° for 30 minutes and 11.4 g (0.053 mol) of 1,4-dibromobutane are subsequently added dropwise and it is stirred at 60° for 20 hours. The resulting sodium bromide is suction filtered, washed with ether and the filtrate is evaporated. The residue is fractionally distilled in a high vacuum and apart from the excess 4-isopentyloxy butanol, 1-bromo-4-(4-isopentyloxy-butyloxy)-butane, having a B.P. of 121-123°/0.7 mm Hg, is obtained as a colourless liquid.