modified in various ways in the search for new functions, but few examples are known of crown ethers incorporating heterocycles in macro-ring systems. Here we report a simple and versatile synthesis of crown ether-bearing heterocycles. An acylurea moiety in the heterocycles is efficiently transformed to 'crown ether' of various ring sizes. The products included a Ca(2+)-selective fluoroionophore. Our
为了寻找新的功能,杂环已经以各种方式被修饰,但是很少有人知道在大环系统中掺入杂环的
冠醚。在这里,我们报告了一种简单而通用的冠状含醚杂环的合成方法。杂环中的酰
脲部分被有效地转化为各种环大小的“
冠醚”。产品包括Ca(2 +)-选择性
氟离子载体。我们的简单方法有望提供许多新颖的功能性
杂环化合物,包括
氟离子载体和候选药物。