申请人:SUMIKA FINE CHEMICALS Co., Ltd.
公开号:EP0967213A1
公开(公告)日:1999-12-29
A process for preparing a tetraalkylammonium salt of a 6-halogenopurine derivative, represented by the formula:
wherein R1 is hydrogen, formyl group or acetyl group; each of R2, R3, R4 and R5 is independently a C1-10 alkyl group; X1 is chlorine, bromine or iodine, comprising reacting a 6-halogenopurine derivative represented by the formula:
wherein R1 and X1 are the same as defined above, or a salt thereof with a tetraalkylammonium salt represented by the formula:
wherein R2, R3, R4 and R5 are the same as defined above; X2 is chlorine, bromine, iodine, an inorganic acid residue or an organic acid residue; n is an integer of 1 to 3. The tetraalkylammonium salt of a 6-halogenopurine derivative is useful as intermediates for preparation of antiviral agents.
制备6-卤代嘌呤衍生物的四烷基铵盐的方法,其化学式如下:其中R1为氢、甲酰基或乙酰基;R2、R3、R4和R5中的每一个独立地为C1-10烷基;X1为氯、溴或碘,包括将化学式表示的6-卤代嘌呤衍生物:其中R1和X1与上述定义相同,或其盐与化学式表示的四烷基铵盐反应:其中R2、R3、R4和R5与上述定义相同;X2为氯、溴、碘、无机酸残基或有机酸残基;n为1至3的整数。6-卤代嘌呤衍生物的四烷基铵盐可用作制备抗病毒药物的中间体。