Skip to content

Sally Freeman

8 papers in the library · 128 citations · publishing 2004-2010

Papers

Sort Most recent Most cited

Characterization of the synthesis of N,N‐dimethyltryptamine by reductive amination using gas chromatography ion trap mass spectrometry

Drug Testing and Analysis July 1, 2010 Simon D. Brandt, Sharon A. Moore, Sally Freeman et al. 14 citations

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...

DOI: 10.1002/dta.142 (opens in new tab) Reductive amination Sodium cyanoborohydride Tryptamine Sodium borohydride +6

Characterisation of a proposed internet synthesis of N,N-dimethyltryptamine using liquid chromatography/electrospray ionisation tandem mass spectrometry.

Journal of Chromatography A August 14, 2009 Cláudia P.B. Martins, Sally Freeman, John F. Alder et al. 11 citations

The psychoactive properties of N,N-dimethyltryptamine (DMT) are known to induce altered states of consciousness in humans. These properties attract great interest from clinical, neuroscientific, clandestine and forensic communities. The Breath of Hope Synthesis was reported on an internet website as a convenient two-step methodology for the preparation of DMT. The analytical characterisation of...

Halogenated solvent interactions with N,N-dimethyltryptamine: formation of quaternary ammonium salts and their artificially induced rearrangements during analysis.

Forensic Science International July 4, 2008 Simon D. Brandt, Cláudia P.B. Martins, Sally Freeman et al. 10 citations

The psychoactive properties of N,N-dimethyltryptamine (DMT) 1a are known to induce altered states of consciousness in humans. This particular attribute attracts great interest from a variety of scientific and also clandestine communities. Our recent research has confirmed that DMT reacts with dichloromethane (DCM), either as a result of work-up or storage to give a quaternary N-chloromethyl...

N,N-Dimethyltryptamine and dichloromethane: Rearrangement of quaternary ammonium salt product during GC–EI and CI-MS–MS analysis

Journal of Pharmaceutical and Biomedical Analysis December 28, 2007 Simon D. Brandt, Cláudia P.B. Martins, Sally Freeman et al. 10 citations

N,N-Dimethyltryptamine (DMT) 1 is a simple tryptamine derivative with powerful psychoactive properties. It is abundant in nature and easily accessible through a variety of synthetic routes. Most work-up procedures require the use of organic solvents and halogenated representatives are often employed. DMT was found to be reactive towards dichloromethane, either during work-up or long term...

DOI: 10.1016/j.jpba.2007.12.024 (opens in new tab) Dichloromethane Tryptamine Gas chromatography–mass spectrometry Indole test +3

Analytical chemistry of synthetic routes to psychoactive tryptamines : Part II. Characterisation of the Speeter and Anthony synthetic route to N,N-dialkylated tryptamines using GC-EI-ITMS, ESI-TQ-MS-MS and NMR

The Analyst 2005 Simon D. Brandt, Sally Freeman, Ian A. Fleet et al. 46 citations

The degree of alkylation of the side chain nitrogen in tryptamines is one important factor that affects psychoactivity. The method of Speeter and Anthony is considered to be one of the most important synthetic preparative methods. The final step in this reaction is based on the reduction of a (substituted) indole-3-yl-glyoxalylamide to the desired tryptamine with metal hydride. Twelve...

DOI: 10.1039/b413014f (opens in new tab) Tryptamines Mass spectrometry Conformational isomerism Chemical shift +9

Analytical chemistry of synthetic routes to psychoactive tryptamines : Part III. Characterisation of the Speeter and Anthony route to N,N-dialkylated tryptamines using CI-IT-MS-MS

The Analyst 2005 Simon D. Brandt, Sally Freeman, Ian A. Fleet et al. 10 citations

Twelve symmetrically and 13 asymmetrically N,N-disubstituted glyoxalylamide precursors and their corresponding tryptamine derivatives have been characterised by gas chromatography low-pressure chemical ionisation ion trap tandem mass spectrometry (CI-IT-MS-MS) with internal (in situ) ionisation using methanol as the chemical ionisation reagent. Mass spectral differences and similarities between...

DOI: 10.1039/b504001a (opens in new tab) Tryptamines Iminium Tandem mass spectrometry Chemical ionization +7

An analytical perspective on favoured synthetic routes to the psychoactive tryptamines.

Journal of Pharmaceutical and Biomedical Analysis November 19, 2004 Simon D. Brandt, Sally Freeman, Peter McGagh et al.

Many tryptamine derivatives are known to induce altered states of consciousness and are increasingly of interest in forensic and neurobiological studies. The analytical chemistry of certain synthetic routes to the tryptamines is discussed and likely side products and impurities identified, where literature reports are available. Recent examples from the authors' laboratory are presented to...

Analytical chemistry of synthetic routes to psychoactive tryptamines : Part I. Characterisation of the Speeter and Anthony synthetic route to 5-methoxy-N,N-diisopropyltryptamine using ESI-MS-MS and ESI-TOF-MS

The Analyst 2004 Simon D. Brandt, Sally Freeman, Ian A. Fleet et al. 27 citations

5-Methoxy-N,N-diisopropyltryptamine (5-MeO-DIPT), a new psychoactive tryptamine derivative, has been synthesised by the Speeter and Anthony procedure. This synthetic route was characterised by ESI-MS-MS, ESI-TOF-MS and NMR. Side products have been identified as 3-(2-N,N-diisopropylamino-ethyl)-1H-indol-5-ol (5), 2-N,N-diisopropylamino-1-(5-methoxy-1H-indol-3-yl)-ethanol (6),...

DOI: 10.1039/b407239c (opens in new tab) Tryptamines Synthetic cannabinoids Ethanol Derivative finance +3