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ChemicalBook CAS DataBase List 1-(3-Pyridinyl)piperazine
67980-77-2

1-(3-Pyridinyl)piperazine synthesis

7synthesis methods
-

Yield: 90%

Reaction Conditions:

with trifluoroacetic acid in dichloromethane for 15 h;

Steps:

1.B 1-(3-Pyridyl)-piperazine fumaric acid salt (1B)
A solution of 1-(3-pyridyl)-4-tert-butoxycarbonylpiperazine (1.3 g, 4.9 mmol), trifluoroacetic acid (11.3 g, 99 mmol) and dichloromethane (50 ml) was stirred for 15 h. The mixture was evaporated. Sodium hydroxide (4 M) was added. The product was extracted three times with dichloromethane (50 ml) and isolated as an oil. Yield 0.72 g, 90 %. The corresponding salt was obtained by addition of a diethyl ether and methanol mixture (9:1), saturated with fumaric acid. Mp 161.7-164.8° C.

References:

Neurosearch A/S US2004/72823, 2004, A1 Location in patent:Page/Page column 14

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