Sulfonyl Group Dance: A Tool for the Synthesis of 6-Azido-2-sulfonylpurine Derivatives
作者:Ja̅nis Miķelis Zaķis、Kristers Ozols、Irina Novosjolova、Reinis Vilšķe̅rsts、Anatoly Mishnev、Ma̅ris Turks
DOI:10.1021/acs.joc.9b03518
日期:2020.4.3
6-azido-2-sulfonylpurine derivatives with 61-83% yields when treated with sodium azide. Under optimized reaction conditions, the title compounds are obtained in a one-pot process, which involves a sequential treatment of 2,6-dichloropurines with a selected sodium sulfinate and sodium azide. Such a sulfonyl group dance (functional group swap) results from a cascade of SNAr reactions, which are facilitated
当用叠氮化钠处理时,用9-取代的2-氯-6-磺酰基嘌呤可提供61-83%产率的6-叠氮基-2-磺酰基嘌呤衍生物。在优化的反应条件下,以一锅法获得标题化合物,该过程涉及用选定的亚磺酸钠和叠氮化钠依次处理2,6-二氯嘌呤。磺酰基基团的跳动(官能团交换)是由SNAr反应级联产生的,叠氮基甲亚胺-四唑(叠氮化物-四唑)互变异构平衡促进了这种反应。作为四唑嘌呤互变异构体的迈森海默型中间体的形成受到包括15N NMR在内的各种光谱方法的支持。