Method for preparing polyazacycloalkanes grafted on silica gel and use of grafted compounds
申请人:Commissariat a l'Energie Atomique
公开号:US06372903B1
公开(公告)日:2002-04-16
The invention concerns a method for preparing polyazacycloalkanes immobilised on a silica gel from a polyazacycloalkane of formula (A) in which: R1 and R2 represent a hydrogen atom, an alkyl radical, or a [hetero(aryl)]alkyl radical; W1, W2 and W3 represent a radical of formula (B): —[(CT1T2)n—[N(R3)]p—(CT3T4)m]l— such as defined in the description; R3 represents a hydrogen atom, an alkyl radical or a [hetero(aryl)]alkyl radical, provided that the polyazacycloalkane ring of the compound of formula (A) comprises not more than 30 cyclic carbon atoms, and not more than 6 cyclic nitrogen atoms. The invention is characterised in that: (a) the compound of formula (A) is reacted with a compound of formula (C): Z—R4—Si(X1)(X2)(X3), such as defined in the description to form a compound of formula (D); (b) said compound of formula (D) is condensed on the silanol sites of a silica gel to form the immobilised polyazacycloalkane of formula (E); and (c) some ethanol sites having not reacted are, if required, protected by Z′, a group protecting the hydroxyl function. The invention is useful for separating oxygen from air.
该发明涉及一种从公式(A)中的聚氮环烷制备固定在硅胶上的聚氮环烷的方法,其中:R1和R2代表氢原子、烷基基团或一个[杂(芳基)]烷基基团;W1、W2和W3代表公式(B)的基团:—[(CT1T2)n—[N(R3)]p—(CT3T4)m]l—,如描述中定义的;R3代表氢原子、烷基基团或一个[杂(芳基)]烷基基团,前提是公式(A)化合物的聚氮环烷环包含的不超过30个环状碳原子和不超过6个环状氮原子。该发明的特征在于:(a)公式(A)的化合物与公式(C)的化合物发生反应:Z—R4—Si(X1)(X2)(X3),如描述中定义的形成公式(D)的化合物;(b)所述的公式(D)的化合物在硅胶的硅醇位点上缩合形成公式(E)的固定聚氮环烷;(c)如果需要,一些未反应的乙醇位点通过Z′进行保护,Z′是保护羟基的基团。该发明对于从空气中分离氧气是有用的。