There is disclosed a dihalo-compound of formula (1):
1
wherein X
1
and X
2
represent different halogen atoms, R represents a hydrogen atom or a protective group for a hydroxyl group, and a process for producing vitamin A derivative via a sulfone derivative of formula (5):
2
wherein Ar represents an optionally substituted aryl group, and R represents the same as defined above.
公开了一种式子为(1)的二卤代化合物:1其中X1和X2代表不同的卤素原子,R代表氢原子或羟基的保护基团,并且通过式子为(5)的磺酰衍
生物制备
维生素A衍
生物的方法:2其中Ar代表可选取代的芳基团,R与上述定义相同。