Formation, Selective Encapsulation, and Tautomerization Control of Isoindoleone Utilizing Guanidinium Sulfonate Framework
Formation, Selective Encapsulation, and Tautomerization Control of Isoindoleone Utilizing Guanidinium Sulfonate Framework
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利用磺酸胍骨架异吲哚酮的形成、选择性封装和互变异构控制
DOI:
10.1002/chem.202400957
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发表时间:
2024
期刊:
影响因子:
--
通讯作者:
Lee, Alfred Y.
中科院分区:
文献类型:
--
作者:
Chaudhry, Mohammad T.;Newman, Justin A.;Lee, Alfred Y.
Herein we report the use of tetrakis (guanidinium) pyrenetetrasulfonate (G4PYR) and bis (guanidinium) 1,5‐napthalene disulfonate (G2NDS) to catalyze the cyclization of 2‐cyanobenzamide (1) to isoindolone (2). Moreover, we demonstrate the remarkable selectivity of these guanidinium organosulfonate hosts in encapsulating2over1. By thoroughly investigating the intramolecular cyclization reaction, we determined that guanidinium and the organosulfonate moiety acts as the catalyst in this process. Additionally,2is selectively encapsulated, even in mixtures of other structurally similar heterocycles like indole. Furthermore, the tautomeric state of2(amino isoindolone (2–A) and imino isoindolinone forms (2–I)) can be controlled by utilizing different guanidinium organosulfonate frameworks.