The present invention provides a process for preparing 5-(acetylamino)-4-[(aminoiminomethyl)amino]-2,6-anhydro-3,4,5-trideoxy-D-glycero-D-galacto-non-enonic acid Formula (I), which process comprises reducing compound of Formula (IV) by Lindlar catalyst in presence of hydrogen to obtain compound of Formula (V). reacting compound of Formula (V) with pyrazole-1H-carboxamidine or its suitable salt to obtain compound of Formula (VIII). hydrolyzing the compound of Formula (VIII) to give compound of Formula (I). The present invention also provides compounds of formula (VIII) which may be used in the synthesis of zanamivir. The present invention also provides process for preparing compound of formula (VIII) and process involving the use of Formula (VIII), including in the synthesis of zanamivir.
本发明提供了一种制备5-(乙酰
氨基)-4-[(
氨基亚
甲基)
氨基]-2,6-
脱氧-3,4,5-三去
氧-D-
甘露醇-
D-半乳糖-9-
烯酸酐式化合物(I)的方法,该方法包括将式(IV)化合物在
氢气存在下通过Lindlar
催化剂还原得到式(V)化合物,将式(V)化合物与
吡唑-1H-羧酰
胍或其适宜的盐反
应得到式(VIII)化合物,
水解式(VIII)化合物得到式(I)化合物。本发明还提供了式(VIII)化合物,可用于制备
扎那米韦。本发明还提供了制备式(VIII)化合物的方法和涉及使用式(VIII)化合物的方法,包括在
扎那米韦的合成中。