Optically active 1,3-dioxin-4-ones have the formula :
wherein n is a value of 1 to 3 ; X is a hydrogen atom, a benzyloxy group, a chlorine atom or N3 ; Y is a hydrogen atom or an acetyl group ; the symbol * represents an asymmetric carbon atom ; and the substituent chain is present at the 5- or 6-position ; provided that when n is 1 and X is a benzyloxy group, a chlorine atom or N3, the substituent is present at the 6-position ; when n is 2 and X is a hydrogen atom the substituent is present at the 5-position ; and when n is 3 and X is a hydrogen atom, the substituent is present at the 6-position.
Various methods for the preparation are disclosed.
具有光学活性的 1,3-二恶英-4-酮的
化学式为 :
其中 n 的值为 1 至 3;X 为氢原子、苄氧基、
氯原子或 N3;Y 为氢原子或乙酰基;符号 * 代表不对称碳原子;取代基链存在于 5 位或 6 位;当 n 为 1 时,X 为苄氧基、
氯原子或 N3,取代基存在于 6 位;当 n 为 2 时,X 为氢原子,取代基存在于 5 位;当 n 为 3 时,X 为氢原子,取代基存在于 6 位。
已公开的制备方法有多种。