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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 42176Generated: October 26, 2026

Piperazine → 1-Benzyl-4-piperazin-1-yl-phthalazine

https://huagongshe.com/reaction/42176

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPiperazineHCID 4837—
ReactantTriethylamineHCID 8471—
ReactantN-methyl-2-pyrrolidoneHCID 13387—
Reactant1-Benzyl-4-chlorophthalazineHCID 6404566—
SolventDichloromethaneHCID 6344—
Product1-Benzyl-4-piperazin-1-yl-phthalazineHCID 640402358.6%

Reaction Steps

1-Benzyl-4-chlorophthalazine (1.06 g, 4.18 mmol) and piperazine (1.82 g, 20.9 mmol) are added into a microwave vial, followed by NMP (5 ml) and triethylamine (6.62 ml, 12.5 mmol). The vial is sealed and irradiated in the microwave at 180° C. (high absorption setting) for 30 minutes. Dichloromethane (10 mL) is added to form a precipitate, which is washed with additional dichloromethane and dried under reduced pressure to afford the product as a white powder (745 mg, 58% yield).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08536168B2
Source datasetuspto-grants-2013_09
ORD IDord-2b84ef5d88e24f2ea72c32f3e89068b2
Source noteuspto-grants-2013_09