Sintesis Hemiterpena Turunan 3-Metil-2-Buten-1-ol

Khasanah, Utami (2015) Sintesis Hemiterpena Turunan 3-Metil-2-Buten-1-ol. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Monoterpena dan seskuiterpena teroksigenasi merupakan kelompok senyawa kimia yang memegang peranan penting sebagai pewangi dalam industri parfum. Hemiterpena merupakan kelompok terpena terkecil yang berpotensi besar sebagai senyawa pewangi, tetapi jarang dijumpai di alam. 3-metil-2-buten-1-il asetat merupakan hemiterpena dengan aroma fresh, green, strong fruity yang telah diproduksi sejak tahun 1960, dan banyak dimanfaatkan dalam produk-produk pewangi. Metode sintesis 3- metil-2-buten-1-il asetat telah dikembangkan, tetapi masih terdapat kekurangan. Penelitian yang dilaksanakan mengkaji sintesis 3-metil-2-buten-1-il asetat pada suhu kamar dari reaksi 3- metil-2-buten-1-ol dengan asetil klorida dengan kondisi tanpa basa (metode A), dengan basa trietilamina (metode B), dan dengan basa piridina (metode C). Sintesis dengan metode A berlangsung dalam waktu 50 m enit, tetapi dihasilkan campuran senyawa yang diantaranya adalah 3-metil-2-buten-1-il asetat. 3- metil-2-buten-1-il asetat berhasil disintesis dengan metode B, yang membutuhkan waktu 40 m enit dengan rendemen 92%. Sintesis 3-metil-2-buten-1-il asetat dengan metode C berlangsung dalam waktu 30 menit dengan rendemen 95%. Sintesis hemiterpena 3-metil-2-buten-1-il heksanoat dan 3-metil-2-buten- 1-il-3,3-dimetil butanoat selanjutnya dilakukan dengan mengadaptasi metode C, dan diperoleh rendemen masing-masing 95% dan 94% dalam waktu tidak lebih dari 30 menit. ========================================================================================== Oxygenated monoterpene and sesquiterpene are the most important chemistry compound as fragrance. Hemiterpene is a terpene group with the smallest abundance and has great potential as a feragrance compound, but very rarely. 3-methyl-2-buten-1-yl acetate is a hemiterpene with fresh, green, strong fruity aroma that widely used as a fragrance and has been produced since 1960. Method of synthesis of 3-methyl-2-buten-1-yl acetate had been developed, but still deficiency. Research had been do to examined the synthesis of 3-methyl-2-buten-1-yl acetate at room temperature from the reaction of 3-methyl-2-buten-1-ol and acetyl chloride with the absence of base (method A), the presence of triethylamine (method B), and the presence of pyridine (method C). Synthesis with method A needed 50 minutes time of reaction, but produced mixture compounds and either is 3-methyl-2-buten- 1-yl acetate. 3-methyl-2-buten-1-yl acetate had been synthesized with method B for 40 minutes with 92% of yield. Synthesis of 3- methyl-2-buten-1-yl acetate with method C had been do f or 30 minutes with 95% of yield. Synthesis of 3-methyl-2-buten-1-yl hexanoate and 3-methyl-2-buten-1-yl-3,3-dimethyl butanoate had been do with adapted method C, and it produced 95% and 94% of yield in the time less than 30 minutes.

Item Type: Thesis (Undergraduate)
Additional Information: RSKi 572.549 Kha s
Uncontrolled Keywords: hemiterpena, sintesis, senyawa pewangi, hemiterpene, shynthesis, fragrance compound
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Mathematics and Science > Chemistry > (S1) Undergraduate Theses
Depositing User: Eny Widiastuti -
Date Deposited: 25 Apr 2018 03:26
Last Modified: 25 Apr 2018 03:26
URI: http://repository.its.ac.id/id/eprint/51803

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