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β-紫羅蘭酮

非售品
CAS:127-41-3
分子式:C13H20O
分子量:

 α-紫羅蘭酮
 英文: α-ionone
 CAS號: 127-41-3
 分子式:  C13H20O
 相關信息:
存在于大柱波羅尼亞(Boronia megastigma)、廣木香(Saussurea lappa)和桂花(Osmanthus fragrans)精油中。主要有α-和β-兩種異構體,α-體具強的花香,稀釋后似紫羅蘭香。沸點80.2℃(0.13kPa)。d250.9279. 1.4959。由檸檬醛和丙酮在堿存在下縮合成假性紫羅蘭酮,然后在酸催化下環化取得。用脫氫芳樟醇為原料同異丙烯基乙醚反應后重排和雙鍵的轉移,或同乙酰乙酸乙酯的Carroll反應均可生成假性紫羅蘭酮。環化反應時如用磷酸為環化劑,產物中富含α-體。如用濃硫酸時則主要生成β-體。廣泛用于日用化妝和食用香精。
亚洲综合小说另类图片五月天
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