|Systematic (IUPAC) name|
|Mol. mass||177.242 g/mol|
5-(2-Aminopropyl)-2,3-dihydrobenzofuran (5-APDB, 3-Desoxy-MDA, EMA-4) is a putative entactogen drug of the phenethylamine and amphetamine classes. It is an analogue of MDA where the heterocyclic 3-position oxygen from the 3,4-methylenedioxy ring has been replaced by a methylene bridge. 6-APDB is an analogue of 5-APDB where the 4-position oxygen has been replaced by a methylene bridge instead. 5-APDB was developed by a team led by David E. Nichols at Purdue University as part of their research into non-neurotoxic analogues of MDMA.
In animal studies, 5-APDB's effects generalize most closely to non-stimulant MDMA analogues such as MBDB and MMAI, while producing no substitution for LSD or amphetamine. In vitro studies show that 5-APDB acts as a highly selective serotonin releasing agent (SSRA), with IC50 values of 130 nM, 7,089 nM, and 3,238 nM for inhibiting the reuptake of serotonin, dopamine, and norepinephrine, respectively. In contrast, 6-APDB is more balanced on the three monoamine neurotransmitters and acts more similarly to MDA and MDMA. Anecdotal reports from human users suggest that 5-APDB produces mild empathy but with relatively little euphoria and is accompanied by sedation.
Methoxy-substituted analogues of 5-APDB and 6-APDB have also been made and substituted for DOM in animal tests, although they were around 10x less potent than DOM.
On June 10, 2013 5-APDB and a number of analogues were classified as Temporary Class Drugs in the UK following an ACMD recommendation. This means that sale and import of the named substances are criminal offences and are treated as for class B drugs.
- Monte AP, Marona-Lewicka D, Cozzi NV, Nichols DE (November 1993). "Synthesis and pharmacological examination of benzofuran, indan, and tetralin analogues of 3,4-(methylenedioxy)amphetamine". Journal of Medicinal Chemistry 36 (23): 3700–6.
- Nichols, DE; Hoffman, AJ; Oberlender, RA; Riggs, RM (1986). "Synthesis and evaluation of 2,3-dihydrobenzofuran analogues of the hallucinogen 1-(2,5-dimethoxy-4-methylphenyl)-2-aminopropane: drug discrimination studies in rats.". Journal of Medical Chemistry 29 (2): 302–4.
- Nichols, DE; Snyder, SE; Oberlender, R; Johnson, MP; Huang, XM (1991). "2,3-Dihydrobenzofuran analogues of hallucinogenic phenethylamines.". Journal of Medical Chemistry 34 (1): 276–81.
- "Temporary class drug order report on 5-6APB and NBOMe compounds". UK Home Office. 4 Jun 2013. Retrieved 2013-06-13.
- NBOMe' and 'Benzofury' banned"'". UK Home Office. 4 Jun 2013. Retrieved 2013-06-13.