Much like linear, branched, and cyclic alkanes, condensed phosphates exist as linear, branched, and cyclic structures. Inasmuch as alkanes are the cornerstone of organic chemistry, generating an inexplorably large chemical space, a comparable richness in structures can be expected for condensed phosphates, as also for them the concepts of isomerism apply. Little of their chemical space has been charted, and only a few different synthesis methods are available to construct isomers of condensed phosphates. Here, we will discuss the application of phosphoramidites with one, two, or three P–N bonds that can be substituted selectively to access different condensed phosphates in a highly controllable manner. Work directed toward the further exploration of this chemical space will contribute to our understanding of the fundamental chemistry of phosphates.

中文翻译：

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冷凝损失：聚磷酸盐、环磷酸盐和超磷酸盐

与直链、支链和环状烷烃非常相似，缩合磷酸酯以直链、支链和环状结构存在。由于烷烃是有机化学的基石，产生了不可探索的大化学空间，因此可以预期缩合磷酸盐具有相当丰富的结构，因为异构体的概念也适用于它们。它们的化学空间很少被绘制出来，只有几种不同的合成方法可用于构建缩合磷酸盐的异构体。在这里，我们将讨论具有一个、两个或三个 P-N 键的亚磷酰胺的应用，这些 P-N 键可以被选择性取代，以高度可控的方式获得不同的缩合磷酸盐。进一步探索这一化学领域的工作将有助于我们了解磷酸盐的基本化学。