Friska, Nanda Nabila2023-02-132023-02-132022-11PerpustakaanElfitrahttps://repository.unri.ac.id/handle/123456789/10852Pyrazoline is a five ring heterocyclic compound containing two adjacent nitrogen atoms and one endocylic double bond. Pyrazoline 5-(4-methoxyphenyl)-3-(naphthalene-2-yl)- 1-tosyl-4,5-dihydro-1H-pyrazole (PZN-2NFT-4TSH) had synthesized through the cyclization of the chalcone 3-(4-methoxyphenyl)-1-(naphthalen-2-yl)-2-propen-1-one with p-toluenesulfonyl hydrazine. The method used is stirring at 70-80oC assisted with hydrochloric acid as catalyst to produce white crystals with yield 47,33%. The purity of the compound was determined using TLC, melting point, and HPLC. The structure of synthesized compound was confirmed by ultraviolet (UV) and fourier transform infrared (FTIR) spectroscopy data analysis.enstirrerpyrazolinesynthesisArticle