HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 408097Generated: October 29, 2026
Piperazine → 7-ethyl-2-piperazin-1-yl-6,7,8,9-tetrahydro-5H-pyrazino[2,3-d]azepine
https://huagongshe.com/reaction/408097
Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Piperazine | HCID 4837 | — |
| Reactant | 2-chloro-7-ethyl-6,7,8,9-tetrahydro-5H-pyrazino[2,3-d]azepine | HCID 58071589 | — |
| Product | 7-ethyl-2-piperazin-1-yl-6,7,8,9-tetrahydro-5H-pyrazino[2,3-d]azepine | HCID 58071600 | 52.6% |
Reaction Steps
3 g 2-chloro-7-ethyl-6,7,8,9-tetrahydro-5H-pyrazino[2,3-d]azepine are combined with 23.3 g piperazine and the mixture is heated to 145° C. for 5 hours. Excess piperazine is distilled off and the residue is treated with dichloromethane and methanol. Any product precipitated is suction filtered and purified by chromatography (Alox, dioxane/toluene/methanol/NH4OH 50/20/20/2). 1.95 g product are obtained.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US08759326B2 |
|---|
| Source dataset | uspto-grants-2014_06 |
|---|
| ORD ID | ord-beca2182d8fe4e4487d98701b8bf8b50 |
|---|
| Source note | uspto-grants-2014_06 |
|---|
