SINTESIS 3,4-DIMETOKSIBENZIL ASETAT DAN METIL-(3,4- DIMETOKSIFENIL) ASETAT DARI VANILIN DENGAN METODE SONIKASI

• Main Authors: , FIA NABILA, , Dra. Tutik Dwi Wahyuningsih, M.Si., Ph.D
• 格式: Theses and Dissertations NonPeerReviewed
• 出版: [Yogyakarta] : Universitas Gadjah Mada 2012
• 主題: ETD
• 在線閱讀: https://repository.ugm.ac.id/101024/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=57231
• 機構: Universitas Gadjah Mada

Synthesis of 3,4-dimethoxybenzyl acetate and methyl-(3,4-dimetoxy phenyl) acetate from vanillin have been carried out. Both esters have an activity as attractant fruit flies Dacus dorsalis and Dacus curcubitae. Synthesis of 3,4-dimethoxybenzyl alcohol was carried out via methylation of vanillin followed by reduction. Vanillin methylation with dimethyl carbonate (DMC) was performed under sonication. This reaction yielded 98,36% veratraldehyde. Veratraldehyde was then reduced at room temperature using NaBH4 with stirring and sonication methods, yielded 97,00 and 98,87% 3,4- dimethoxybenzyl alcohol, respectively. 3,4-Dimethoxybenzyl acetate was yielded 98.28% from esterification of 3,4-dimethoxybenzyl alcohol and acetic acid by the use of sulfuric acid as a catalyst with sonication. Methyl-(3,4-dimethoxyphenyl) acetate was produced via 4 concecutive reactions, i.e. 1) chlorination of 3,4-dimethoxybenzyl alcohol with SOCl2 yielded 77,75% 3,4-dimethoxybenzyl chloride, 2) nitrilization of 3,4- dimethoxybenzyl chloride with NaCN in acetone yielded 66,16% 3,4- dimethoxyphenyl acetonitrile, 3) the product was then hydrolyzed with HCl, yielded 89,28% 3,4-dimethoxybenzyl carboxylate and 4) esterification of 3,4- dimethoxybenzyl carboxylate using methanol and sulfuric acid as a catalyst by sonication, yielded 95.23% yellowish viscous liquid of methyl-(3,4- dimethoxyphenyl) acetate.