| 摘要 |
NEW MATERIAL:The coumarone derivative of formula I (R1-R3 are H or methyl; the dotted line represents the presence of one pi-electron). EXAMPLE:dl-2,5,7,8-Tetramethyl-2-(4'-methyl-4'-pentenyl)-6-chromanol. USE:An antioxidant for organic substance. PREPARATION:The compound of formula I can be prepared by reacting the hydroquinone compound of formula II with myrcene hydrochloride (geranyl chloride, neryl chloride or their mixture). Myrcene hydrochloride is obtained by adding hydrochloric acid to myrcene which is available easily and economically from a natural product.
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