Water → Methamphetamine

温度

100 °C

Amphetamine free base (100 mg, 0.71 mmol) was dissolved in ethyl formate (10 mL). The solution was heated under pressure in an ACE pressure reactor for 2 hours at 100° C. The reaction mixture was cooled down, and the solvent was evaporated under reduced pressure. The resulting carbamate derivative was dissolved in dried diethyl ether (5 mL). The solution was added dropwise to a suspension of lithium aluminium hydride (40.4 mg, 1.07 mmol) in diethyl ether (10 mL). The reaction mixture was refluxed for 5 hours. Thereafter, water was carefully added after the reaction mixture had been cooled down to 0° C. on an ice bath. The lithium salt was filtered over Celite™ diatomaceous earth in Buchner funnel. The granules obtained were washed thoroughly with excess diethyl ether. The combined ether phases were washed with 5% sodium hydroxide and brine before being dried with magnesium sulfate. The solvent was evaporated to yield 96 mg methamphetamine free base.

1. temperatureThe reaction mixture was cooled down
2. customthe solvent was evaporated under reduced pressure
3. dissolutionThe resulting carbamate derivative was dissolved in dried diethyl ether (5 mL)
4. temperatureThe reaction mixture was refluxed for 5 hours
5. temperaturehad been cooled down to 0° C. on an ice bath
6. filtrationThe lithium salt was filtered over Celite™ diatomaceous earth in Buchner funnel
7. customThe granules obtained
8. washwere washed thoroughly with excess diethyl ether
9. washThe combined ether phases were washed with 5% sodium hydroxide and brine
10. dry with materialbefore being dried with magnesium sulfate
11. customThe solvent was evaporated

ORDレコード

ord-508e7efaec174210812995a8dc33d617

出典データセット

uspto-grants-2016_09

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US09435816B2