Described is a new diphosphonate intermediate useful in a new process for producing 4-amino-1-hydroxybutylidene-1,1-bisphosphonic acid (ABP), a new antihypercalcemic agent. The process involves a 3-step sequence starting with 4-phthalimidobutanoyl chloride which can be practiced as a "one-pot" reaction sequence, without employing PCl.sub.3 or H.sub.3 PO.sub.3. The new intermediate has the structure: ##STR1## where n=1-5.
描述了一种新的
二膦酸中间体,可用于生产4-
氨基-1-羟基
丁烯基-1,1-
双膦酸(ABP),一种新的抗高
钙血症药物的新工艺。该工艺包括一个三步反应序列,以4-邻苯二甲
酰亚胺丁酰氯为起始物,可以作为“一锅法”反应序列进行,而不需要使用PCl.sub.3或H.sub.3 PO.sub.3。新的中间体具有以下结构:##STR1## 其中n=1-5。