摘要
假性紫罗兰酮在浓硫酸及 - 2 0°C低温条件下反应 ,主要生成 β-紫罗兰酮 ,少量的 α-及 γ-紫罗兰酮 ,同时生成副产物 ( I)及 ( II)。用 IR、1H NMR及 MS光谱分析方法 ,对副产物 ( I)进行了结构鉴定 ,结构为 3,4,4a,5 ,8,8a-六氢 - 2 ,5 ,5 ,8a-四甲基 - 2 H - 1
Ionone reacted with concentrated sulphuric acid at low temperature to form α Ionone、 β Ionone, γ Ionone and small amounts of by product (I) and (II). The by\|product(I) was isolated and purified by fractionation, meanwhile, its structure was indentified by GC IR,GC MS and 1H NMR methods. The structure of by product(I) is 3,4,4a,5,8,8a hexahydro 2,5,5,8a tetramethyl 2H 1 benzopyran.
出处
《化学世界》
CAS
CSCD
北大核心
2002年第4期191-192,196,共3页
Chemical World
