74917-80-9Relevant academic research and scientific papers
Characterization of route specific impurities found in methamphetamine synthesized by the Leuckart and reductive amination methods
Kunalan, Vanitha,Daeid, Niamh Nic,Kerr, William J.,Buchanan, Hilary A. S.,McPherson, Allan R.
experimental part, p. 7342 - 7348 (2010/04/06)
Impurity profiling of seized methamphetamine can provide very useful information in criminal investigations and, specifically, on drug trafficking routes, sources of supply, and relationships between seizures. Particularly important is the identification of "route specific" impurities or those which indicate the synthetic method used for manufacture in illicit laboratories. Previous researchers have suggested impurities which are characteristic of the Leuckart and reductive amination (Al/Hg) methods of preparation. However, to date and importantly, these two synthetic methods have not been compared in a single study utilizing methamphetamine hydrochloride synthesized in-house and, therefore, of known synthetic origin. Using the same starting material, 1-phenyl-2-propanone (P2P), 40 batches of methamphetamine hydrochloride were synthesized by the Leuckart and reductive amination methods (20 batches per method). Both basic and acidic impurities were extracted separately and analyzed by GC/MS. From this controlled study, two route specific impurities for the Leuckart method and one route specific impurity for the reductive amination method are reported. The intra- and inter-batch variation of these route specific impurities was assessed. Also, the variation of the "target impurities" recently recommended for methamphetamine profiling is discussed in relation to their variation within and between production batches synthesized using the Leuckart and reductive amination routes.
REDUCTION OF ARYLALKYLAZOMETHINES WITH SODIUM BOROHYDRIDE
Dumpis, M. A.,Kudryashova, N. I.,Veresova, M. A.
, p. 1332 - 1337 (2007/10/02)
The secondary amines R1R2C6H3CH2CH(CH3)NHCHR5CHR6(CH2)nC6H3R3R4 were synthesized by the reduction of the respective azomethines with sodium borohydride.The reaction was conducted in anhydrous methanol in the presence of hydrogen chloride with the azomethine and hydrogen chloride in a molar ratio of 1:1.The yield was 50-90percent.The erythro and threo isomers were isolated, and the data from the IR spectra of the isomers are given.
