Pentadecalactone → 15-Bromopentadecanoic acid
反応式
[C:1]1(=[O:17])[O:16][CH2:15][CH2:14][CH2:13][CH2:12][CH2:11][CH2:10][CH2:9][CH2:8][CH2:7][CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[BrH:18].C(O)(=O)C>>[Br:18][CH2:15][CH2:14][CH2:13][CH2:12][CH2:11][CH2:10][CH2:9][CH2:8][CH2:7][CH2:6][CH2:5][CH2:4][CH2:3][CH2:2][C:1]([OH:16])=[O:17]参加物
3
実験手順
15-Pentadecanolide of 14.3 g (59.5 mmol), and 32% hydrogen bromide/acetic acid solution of 24.8 g (98.0 mmol, 1.6 eq) were added to 100 mL of autoclave protected with Teflon (registered trade name). After purging with nitrogen and sealing, the autoclave was placed in an oil bath at 60° C. and stirring was carried out for 16 hours. For the stirring, a magnetic stirrer was used. After cooling, 14 mL of water was added, and by using 200 mL of hot hexane the mixture was transferred to a separatory funnel. After washing with ion exchange water, it was dried over the magnesium sulfate. After filtration, 17.4 g of the target compound was obtained by crystallization using n-hexane (yield 91%).
後処理
- customAfter purging with nitrogen and sealing
- customthe autoclave was placed in an oil bath at 60° C.
- temperature