Provided are a fosaprepitant phosphate intermediate (IV) preparation method, a fosaprepitant phosphate intermediate (IV-A) and a method of (AA) for preparing fosaprepitant dimeglumine by using the intermediate (IV-A). IV: R
1
and R
2
are independently selected from C1-C7 alkyl groups or benzyl groups; IV-A: R
1
and R
2
are independently selected from C1-C7 alkyl groups, and R
1
and R
2
are not both benzyl groups.
提供了一种fosaprepitant
磷酸盐中间体(IV)的制备方法,一种fosaprepitant
磷酸盐中间体(IV-A)和一种利用中间体(IV-A)制备fosaprepitant二
甲胍的方法(
AA)。IV:R1和R2分别选择C1-C7烷基或苄基;IV-A:R1和R2分别选择C1-C7烷基,且R1和R2不同时为苄基。