MINYAK CENGKEH KiMIA MINYAK ATSIRI. HISTORY OF CLOVE Cloves were used in China as early as 266 BC, and by the 4 th century, they were known in Europe,
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Presentasi berjudul: "MINYAK CENGKEH KiMIA MINYAK ATSIRI. HISTORY OF CLOVE Cloves were used in China as early as 266 BC, and by the 4 th century, they were known in Europe,"— Transcript presentasi:
MINYAK CENGKEH KiMIA MINYAK ATSIRI
HISTORY OF CLOVE Cloves were used in China as early as 266 BC, and by the 4 th century, they were known in Europe, although very expensive. Same as with nutmeg, the Dutch also destroyed all trees from surrounding native islands to secure a monopoly, and cultivated them only in a small group of islands. In 1770, the French managed to introduce clove trees to Mauritius, and started cultivating them there, as well as in Zanzibar, Penang and Sumatra.
COLLECTION & PREPARATION The flower buds are collected when the lower part turns green-crimson. The cloves are dried in the open air on mats & separated from their peduncles (forming clove stalks which are also sold commercially). If left on the tree for too long, the buds open & the petals fall, leaving “brown cloves”. Later the fruits (“mother cloves”) are produced.
MACROSCOPICAL FEATURES Cloves are mm long. The head consists of 4 slightly projecting calyx teeth, 4 membranous petals and numerous incurved stamens around a large style. Odour: Spicy & Pungent Taste: Aromatic
MICROSCOPICAL FEATURES Heavy cuticularized epidermis Numerous oil cells (shizolysigenous) Calcium oxalates (cluster crystals & prisms) Stomata (epidermis of sepals) Starch (Fruit – “mother cloves”) Lignified sclereids
USES OF CLOVE Stimulant aromatic Spice For the preparation of volatile oil Sesquiterpenes: potential anti-carcinogenic compounds
CLOVE OIL Oil distilled in Europe and the US normally does not need purification, while oil distilled in other areas (e.g. Madagascar) does. After purification the oil is sold with varying eugenol contents. Oil of cloves is yellow or colourless, is slightly heavier than water.
CLOVE OIL - CONSTITUENTS Volatile oils : PHENOLIC COMPOUNDS : mainly eugenol NON PHENOLIC COMPOUNDS : Sesquiterpenes (α and β caryophyllene, a-kubeben, a-kopaen, d, kadinen, kadina-1,3,5-trien) Oil of clove – like other volatile/essential oils – should be stored in a well-fitted, air-tight container, & should be protected from light & heat.
ISOLASI EUGENOL DAN KARIOFILEN MINYAK DAUN CENGKEH DIDESTILASI BERTINGKAT DENGAN PENGURANGAN TEKANAN. DESTILAT DENGAN TITIK DIDIH Oc PADA 5 mmHg, PADA KROMATOGRAFI GAS MEMPUNYAI DUA PUNCAK UTAMA, YAITU b-KARIOFILEN (28.0%) DAN EUGENOL (71,5%). Sifat fisik : nD = 1,530, massa jenis pada 30oC = 0,9994 ISOLASI EUGENOL : DItambahkan DENGAN NaOH, FASA AIR DIASAMKAN, DAN FASA EUGENOL DIDESTILASI EUGENOL nD = 1,5369; d = 1,053 Lapisan kariofilena didestilasi ulang.
IDENTIFIKASI EUGENOL SPEKTRUM H NMR EUGENOL
DERIVATISASI EUGENOL 1.SINTESIS EUGENIL METIL ETER Eugenil Metil Eter sangat luas digunakan sebagai komposisi parfum, baunya lebi lunak dari eugenol Penarik lalat buah jantan (feromon)
2. SINTESIS EUGENIL ASETAT EUGENIL ASETAT DIGUNAKAN SEBAGAI PENGHARUM SABUN DAN IMITATION SPICE OIL
3. SINTESIS VANILIN Isoeugenol, senyawa yang digunakan jenis pewangi floral dan fancy bonqouets, anyelir.
SINTESIS AMFETAMIN Amfetamin adalah psikostimulan, obat-obatan yang menstimulir dan menaikkan kepercayaan diri. Digunakan juga untuk perangsang psikomotor agar tidak mengantuk Penekan nafsu makan antiobesitas
SINTESIS DOPA DOPA OBAT PENYAKIT PARKINSON
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