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Characterization of the synthesis of N , N ‐dimethyltryptamine by reductive amination using gas chromatography ion trap mass spectrometry
Author(s) -
Brandt Simon D.,
Moore Sharon A.,
Freeman Sally,
Kanu Abu B.
Publication year - 2010
Publication title -
drug testing and analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.065
H-Index - 54
eISSN - 1942-7611
pISSN - 1942-7603
DOI - 10.1002/dta.142
Subject(s) - chemistry , reductive amination , sodium cyanoborohydride , tryptamine , sodium borohydride , reagent , mass spectrometry , chromatography , formaldehyde , nuclear chemistry , organic chemistry , biochemistry , catalysis
The present study established an impurity profile of a synthetic route to the hallucinogenic N , N ‐dimethyltryptamine (DMT). The synthesis was carried out under reductive amination conditions between tryptamine and aqueous formaldehyde in the presence of acetic acid followed by reduction with sodium cyanoborohydride. Analytical characterization of this synthetic route was carried out by gas chromatography ion trap mass spectrometry using electron‐ and chemical‐ionization modes. Methanol was employed as a liquid CI reagent and the impact of stoichiometric modifications on side‐products formation was also investigated. Tryptamine 1 , DMT 2 , 2‐methyltetrahydro‐β‐carboline (2‐Me‐THBC, 3 ), N ‐methyl‐ N ‐cyanomethyltryptamine (MCMT, 4 ), N ‐methyltryptamine (NMT, 5 ), 2‐cyanomethyl‐tetrahydro‐β‐carboline (2‐CM‐THBC, 6 ) and tetrahydro‐β‐carboline (THBC, 7 ) have been detected under a variety of conditions. Replacement of formaldehyde solution with paraformaldehyde resulted in incomplete conversion of the starting material whereas a similar replacement of sodium cyanoborohydride with sodium borohydride almost exclusively produced THBC instead of the expected DMT. Compounds 1 to 7 were quantified and the limits of detection were 28.4, 87.7, 21.5, 23.4, 41.1, 36.6, and 34.9 ng mL −1 , respectively. The limits of quantification for compounds 1 to 7 were 32.4, 88.3, 25.4, 24.6, 41.4, 39.9, and 37.0 µg mL −1 , respectively. Linearity was observed in the range of 20.8–980 µg mL −1 with correlation coefficients > 0.99. The application holds great promise in the area of forensic chemistry where development of reliable analytical methods for the detection, identification, and quantification of DMT are crucial and also in pharmaceutical analysis where DMT might be prepared for use in human clinical studies. Copyright © 2010 John Wiley & Sons, Ltd.