第章萜^族化合物 rones
第十八章 萜类和甾族化合物 Terpenes and Steroids
181萜类 Terpenes
18.1 萜类 Terpenes
t has been known for centuries that codistillation of many plant materials with steam(called steam distillation produces a fragrant mixture of liquids known as plant essential oils These compounds have had a variety of uses, particularly in early medicine and in the making of perfumes
◼ It has been known for centuries that codistillation of many plant materials with steam (called steam distillation) produces a fragrant mixture of liquids known as plant essential oils. ◼ These compounds have had a variety of uses, particularly in early medicine and in the making of perfumes
Chemically, the essential oils of plants consist largely of mixtures of lipids called terpenes a Terpenes are small organic molecules that have an immense diversity of structure. Thousands of different terpenes are known; some are hydrocarbons and others contain oxygen; some are open chain molecules, and others contain rings
◼ Chemically, the essential oils of plants consist largely of mixtures of lipids called terpenes. ◼ Terpenes are small organic molecules that have an immense diversity of structure. Thousands of different terpenes are known; some are hydrocarbons, and others contain oxygen; some are openchain molecules, and others contain rings
Some terpenes isolated from essential oils Myrcene(oil of bay)a-Pinene(oil of turpentine) 月桂烯 α-蒎烯 Carvone(oil of spearmint) 香芹酮
Some terpenes isolated from essential oils Myrcene (oil of bay) -Pinene (oil of turpentine) O Carvone (oil of spearmint) 月桂烯 -蒎烯 香芹酮