申请人:——
公开号:US20040110966A1
公开(公告)日:2004-06-10
A method for the preparation of a compound of formula (II) wherein R
1
and R
2
are independently H, alkyl, alkoxy, oxoalkyl, alkenyl, aryl or arylalkyl whether unsubstituted or substituted, optionally interrupted by one or more hetero atoms, straight chain or branched chain, hydrophilic, hydrophobic or fluorophilic; R
3
, R
4
, R
5
and R
6
are independently or all hydrogen or halogen; provided that at least two of the R
3
, R
4
, R
5
and R
6
are halogens.
一种制备式(II)化合物的方法,其中R1和R2独立地为H、烷基、烷氧基、氧代烷基、烯基、芳基或芳基烷基,无论是否取代,可选地由一个或多个杂原子中断,直链或支链,亲水性、疏水性或亲氟性;R3、R4、R5和R6独立地或全部为氢或卤素;但至少两个R3、R4、R5和R6为卤素。