In recent investigation for 1-phenyl naphthalene has been synthesis via friedel craft acylation and Perkin–Oglialoro reaction followed by cyclization reaction. The key precursor use for synthesis of foresaid product by β -benzoyl propionic acid (β -BPA) through friedel craft acetylating reaction by mixture of succinic anhydride, benzene and its derivative with zeolite at streamline time to obtain blended accumulation followed by work-up with cold acid-water (1:1) treatment. The obtaining accumulation on distillation to eliminate benzene liquor and obtained crude mass. It dissolve in aqueous solution of sodium carbonate (1:10) and acidification by hydrochloric acid to form crude ï¢-benzoyl propionic acid (ï¢-BPA) and their derivatives. In perkin acid synthesize by two steps in which butenolides are prepared by ß-BPA and aryl aldehyde using weak base catalyst pyridine and followed by cleavage of lactone ring methanolic base hydrolysis to form perkin acid. The perkin acid undergoes cyclization using zeolite gives 1-phenyl naphthalene. The similar contexts the 1-phenyl naphthalene derivatives are extracted from medicinal plant i.e., Cleistanthus collinus and isolated by column chromatography. These entire compounds are determined by UV-Visible spectrophotometry.