Nitric Acid → 4-Bromobutyl nitrate

Temperature

0 °C

In reactor cooled to −5 to 5° C., nitric acid fuming (8.5 g-135 mmol) was slowly added to a solution of 98% sulfuric acid (13.0 g-130 mmol) in dichloromethane (18.0 g-212 mmol). 4-bromobutanol (10.2 g-66.6 mmol) was then added to this mixture and the reaction medium was stirred at −5 to 5° C. over a period of 2-5 hours. The mixture was poured into cold water (110 g) keeping the temperature between −5° C. and 3° C. After decantation, the upper aqueous phase was extracted with dichloromethane and the combined organic phases were washed with water, adjusted to pH=6-7 by addition of 27.65% sodium hydroxide, washed with brine and dried over magnesium sulfate. Dichloromethane was distilled off under vacuum and crude 4-bromobutyl nitrate (12.7 g-64.1 mmol) was recovered in a yield of about 96%.

1. customthe temperature between −5° C. and 3° C
2. extractionAfter decantation, the upper aqueous phase was extracted with dichloromethane
3. washthe combined organic phases were washed with water
4. additionadjusted to pH=6-7 by addition of 27.65% sodium hydroxide
5. washwashed with brine
6. dry with materialdried over magnesium sulfate
7. distillationDichloromethane was distilled off under vacuum and crude 4-bromobutyl nitrate (12.7 g-64.1 mmol)
8. customwas recovered in a yield of about 96%

ORD record

ord-56ca227b040d4d98843f89c30e00326d

Source dataset

uspto-grants-2011_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08058467B2