
Thesubstituted benzofurans are a class ofchemical compounds based on theheterocyclic andpolycyclic compoundbenzofuran. Many medicines use the benzofuran core as a scaffold,[1][2][3] but most commonly the term is used to refer to the simpler compounds in this class which include numerouspsychoactive drugs, includingstimulants,psychedelics andempathogens. In general, these compounds have a benzofuran core to which a 2-aminoethyl group is attached (at any position), and combined with a range of other substituents.[4][5][6][7] Some psychoactive derivatives from this family have been sold under the nameBenzofury.[8]
The derivatives may be produced by substitutions at six locations of the benzofuran molecule, as well as saturation of the 2,3- double bond.
The following table displays notable derivatives that have been reported:[9][10][11][12][13][14][15][16][17][18][19]
| Structure | Compound | CAS # | R2 | R3 | R4 | R5 | R6 | R7 | Other |
|---|---|---|---|---|---|---|---|---|---|
| 2-APB | 30455-73-3 | 2-aminopropyl | H | H | H | H | H | - | |
| 2-MAPB | 806596-15-6 | 2-(methylamino)propyl | H | H | H | H | H | - | |
| 2-EAPB | 2-(ethylamino)propyl | H | H | H | H | H | - | ||
| BPAP | 260550-89-8 | 2-(propylamino)pentyl | H | H | H | H | H | - | |
| Brofaromine | 63638-91-5 | 4-piperidinyl | H | H | methoxy | H | bromo | - | |
| 3-APB | 105909-13-5 | H | 2-aminopropyl | H | H | H | H | - | |
| Dimemebfe | 140853-58-3 | H | 2-(dimethyl-amino)ethyl | H | methoxy | H | H | - | |
| Mebfap | 140853-59-4 | H | 2-aminopropyl | H | methoxy | H | H | - | |
| 5-MeO-DiBF | H | 2-(diisopropyl-amino)ethyl | H | methoxy | H | H | - | ||
| 4-APB | 286834-82-0 | H | H | 2-aminopropyl | H | H | H | - | |
| DOB-5-HEMIFLY (5-MeO-7-Br-4-APDB) | H | H | 2-aminopropyl | methoxy | H | bromo | 2,3-dihydro | ||
| 5-APB | 286834-81-9 | H | H | H | 2-aminopropyl | H | H | - | |
| 5-MAPB | 1354631-77-8 | H | H | H | 2-(methylamino)propyl | H | H | - | |
| 5-EAPB | 1445566-01-7 | H | H | H | 2-(ethylamino)propyl | H | H | - | |
| 5-APB-NBOMe | H | H | H | 2-[(2-methoxybenzyl)-amino]propyl | H | H | - | ||
| 6-APB | 286834-85-3 | H | H | H | H | 2-aminopropyl | H | - | |
| 6-MAPB | 1354631-79-0 | H | H | H | H | 2-(methylamino)propyl | H | - | |
| 6-EAPB | 1632539-47-9 | H | H | H | H | 2-(ethylamino)propyl | H | - | |
| 5-AEDB | H | H | H | 2-aminoethyl | H | H | 2,3-dihydro | ||
| 5-APDB | 152624-03-8 | H | H | H | 2-aminopropyl | H | H | 2,3-dihydro | |
| 5-MAPDB | 1354631-78-9 | H | H | H | 2-(methylamino)propyl | H | H | 2,3-dihydro | |
| 5-EAPDB | H | H | H | 2-(ethylamino)propyl | H | H | 2,3-dihydro | ||
| 6-APDB | 1354631-78-9 | H | H | H | H | 2-aminopropyl | H | 2,3-dihydro | |
| 6-MAPDB | 1354631-81-4 | H | H | H | H | 2-(methylamino)propyl | H | 2,3-dihydro | |
| 6-EAPDB | H | H | H | H | 2-(ethylamino)propyl | H | 2,3-dihydro | ||
| bk-5-MAPB | H | H | H | 1-oxo-2-(methylamino)propyl | H | H | - | ||
| bk-6-MAPB | H | H | H | H | 1-oxo-2-(methylamino)propyl | H | - | ||
| 5-MBPB | H | H | H | 2-(methylamino)butyl | H | H | - | ||
| 6-MBPB | H | H | H | H | 2-(methylamino)butyl | H | - | ||
| 5-DBFPV | 2117405-32-8 | H | H | H | 1-oxo-2-(pyrrolidin-1-yl)pentyl | H | H | 2,3-dihydro | |
| 6-MeO-5-APDB | H | H | H | 2-aminopropyl | methoxy | H | 2,3-dihydro | ||
| F (F-1) | 99355-77-8 | H | H | H | methoxy | 2-aminopropyl | H | 2,3-dihydro | |
| F-2 | 99355-74-5 | methyl | H | H | methoxy | 2-aminopropyl | H | 2,3-dihydro | |
| F-22 | 952016-51-2 | dimethyl | H | H | methoxy | 2-aminopropyl | H | 2,3-dihydro | |
| 7-APB | 286834-86-4 | H | H | H | H | H | 2-aminopropyl | - | |
| DOI-2-HEMIFLY (4-I-5-MeO-7-APDB) | H | H | iodo | methoxy | H | 2-aminopropyl | 2,3-dihydro | ||
| Amiodarone | 1951-25-3 | propyl | 3,5-diiodo-4-(2-diethylamino-ethoxy)benzoyl | H | H | H | H | - | |
| 2C-B-FLY | 733720-95-1 | H | H | 2-aminoethyl | 5,6-dihydrofuro[5,6-f] | - | bromo | 2,3-dihydro | |
| 2C-B-DRAGONFLY | 260809-98-1 | H | H | 2-aminoethyl | furo[5,6-f] | - | bromo | - | |
| 2C-C-FLY | 1354633-83-2 | H | H | 2-aminoethyl | 5,6-dihydrofuro[5,6-f] | - | chloro | 2,3-dihydro | |
| 2C-I-FLY | 1354633-88-7 | H | H | 2-aminoethyl | 5,6-dihydrofuro[5,6-f] | - | iodo | 2,3-dihydro | |
| 2C-D-FLY | 1354634-07-3 | H | H | 2-aminoethyl | 5,6-dihydrofuro[5,6-f] | - | methyl | 2,3-dihydro | |
| 2C-E-FLY | H | H | 2-aminoethyl | 5,6-dihydrofuro[5,6-f] | - | ethyl | 2,3-dihydro | ||
| 2C-EF-FLY | H | H | 2-aminoethyl | 5,6-dihydrofuro[5,6-f] | - | 2-fluoroethyl | 2,3-dihydro | ||
| 2C-T-7-FLY | 1354633-05-8 | H | H | 2-aminoethyl | 5,6-dihydrofuro[5,6-f] | - | n-propylthio | 2,3-dihydro | |
| 2C-MeTriox | H | H | 2-aminoethyl | 5,6-methylenedioxy[5,6-f] | - | methyl | 2,3-dihydro | ||
| MeTriox | H | H | 2-aminopropyl | 5,6-methylenedioxy[5,6-f] | - | methyl | 2,3-dihydro | ||
| DOB-FLY | 219986-75-1 | H | H | 2-aminopropyl | 5,6-dihydrofuro[5,6-f] | - | bromo | 2,3-dihydro | |
| Bromo-DragonFLY | 502759-67-3 | H | H | 2-aminopropyl | furo[5,6-f] | - | bromo | - | |
| DOB-2-DRAGONFLY-5-BUTTERFLY | 1043541-82-7 | H | H | 2-aminopropyl | 5,6-dihydropyrano | - | bromo | - | |
| DOM-FLY | 748748-08-5 | H | H | 2-aminopropyl | 5,6-dihydrofuro[5,6-f] | - | methyl | 2,3-dihydro | |
| DOMOM-FLY[20] | H | H | 2-aminopropyl | 5,6-dihydrofuro[5,6-f] | - | methoxymethyl | 2,3-dihydro | ||
| 2C-B-FLY-NBOMe | 1335331-42-4 | H | H | 2-[(2-methoxybenzyl)-amino]ethyl | 5,6-dihydrofuro[5,6-f] | - | bromo | 2,3-dihydro | |
| 2C-B-DRAGONFLY-NBOH | 1335331-45-7 | H | H | 2-[(2-hydroxybenzyl)-amino]ethyl | furo[5,6-f] | - | bromo | - | |
| TFMFly | 780744-19-6 | H | H | 2-aminopropyl | 5,6-dihydrofuro[5,6-f] | - | trifluoromethyl | 2,3-dihydro | |
| Mescaline-FLY | H | H | 2-aminoethyl | 5,6-dihydrofuro[5,4-b] | - | methoxy | 2,3-dihydro | ||
| YM-348 | 372163-84-3 | ethyl | H | 1-(2-aminopropyl)-pyrazol[4,5-f] | - | H | H | - | |
| 2-Desethyl-YM-348 | 748116-94-1 | H | H | 1-(2-aminopropyl)-pyrazol[4,5-f] | - | H | H | - |
Substituted benzofurans saw widespread use asrecreational drugs by being sold asresearch chemicals making them exempt from drug legislation. Many of the more common compounds were banned in the UK in June 2013 astemporary class drugs, while others have been made permanently illegal in various jurisdictions.[21][22][23]