According to the isoprene rule proposed by Ruzicka, terpenes can be considered to arise from head-to-tail joining of simple five-carbon Isoprene unIts. CH3 CH2-C-CH-CH Head Isoprene Tail 2-Methyl-1, 3-butadiene Tail Head rene Head Pinene
◼ According to the isoprene rule proposed by Ruzicka, terpenes can be considered to arise from head-to-tail joining of simple five-carbon isoprene units. CH2 C CH CH3 CH2 1 2 3 4 Isoprene 2-Methyl-1,3-butadiene Head Tail Tail Head Myrcene Tail Head -Pinene
Classification of Terpenes Carbon atoms I Isoprene units Classification 10 Monoterpenes 15 Sesquiterpenes 20 25 30 234568 Diterpenes Sesterterpenes Triterpenes 40 Tetraterpenes
Classification of Terpenes Carbon atoms Isoprene units Classification 10 2 Monoterpenes 15 3 Sesquiterpenes 20 4 Diterpenes 25 5 Sesterterpenes 30 6 Triterpenes 40 8 Tetraterpenes
β- Pinene Camphene Limonene β-蒎烯 莰烯 苧烯 β- Caryophyllene β-石竹烯
-Pinene Camphene Limonene -蒎烯 莰烯 苧烯 -Caryophyllene -石竹烯
OH CHOH CH2OH CH2OH analog Nerol Geraniol Citronellol 芳樟醇橙花醇 香叶醇 香茅醇
OH CH2 OH CH2 OH CH2 OH Linalool Nerol Geraniol Citronellol 芳樟醇 橙花醇 香叶醇 香茅醇