申请人:Novartis International Pharmaceutical Ltd.
公开号:US06437125B1
公开(公告)日:2002-08-20
The invention provides a method of rearranging a compound of formula (I), wherein R and R′ are selected independently from hydrogen and C1-12alkyl; and R1 and R2 are selected independently from hydrogen, hydroxy, halo, C1-12alkyl- or aryl carbonate, amino, mono- or di-C1-12alkylamino, C1-12alkyl or arylamido, C1-12alkyl- or arylcarbonyl, C1-12alkyl- or arylcarboxy, C1-12alkyl- or arylcarbamoyl, C1-12alkyl, C2-12alkenyl, C2-12alkynyl, aryl, heteroaryl, C1-12alkoxy, aryloxy, azido, C1-12alkyl- or arylthio, C1-12alkyl- or arylsulfonyl, C1-12alkyl- or arylsilyl, C1-12alkyl- or arylphosphoryl, and phosphato; to form a compound of formula (II), wherein R, R′, R1 and R2 are as defined for formula (I); said method comprising treating the compound of formula (I) with a palladium (0) catalyst and a (diphenylphosphino)nC1-6 alkane, wherein n is an integer of 1-6. The invention also provides methods of R making penciclovir and famciclovir using this rearrangement reaction.
本发明提供了一种重排式化合物的方法,其中化合物的式子为(I),其中R和R′分别独立地选择氢和C1-12烷基;R1和R2分别独立地选择氢、羟基、卤素、C1-12烷基或芳香基碳酸酯、氨基、单或双C1-12烷基氨基、C1-12烷基或芳香基酰胺、C1-12烷基或芳香基甲酰、C1-12烷基或芳香基羧基、C1-12烷基或芳香基氨基甲酰、C1-12烷基、C2-12烯基、C2-12炔基、芳香基、杂环芳基、C1-12烷氧基、芳香氧基、叠氮基、C1-12烷基或芳香基硫基、C1-12烷基或芳香基磺酰基、C1-12烷基或芳香基硅烷基、C1-12烷基或芳香基磷酰基和磷酸酯;通过使用钯(0)催化剂和(二苯基膦)nC1-6烷烃(其中n是1-6的整数)处理式(I)的化合物,形成式(II)的化合物,其中R、R′、R1和R2与式(I)中定义的一样。本发明还提供了使用此重排反应制备penciclovir和famciclovir的方法。