Vilsmeier–Haack-Initiated Formylative Rearrangement of Spirodioxo-lan-5-ones into Functionalized 4,5,6,7-Tetrahydrobenzofurans
作者:Svetlana A. Varenichenko、Victor Markov、Jonas F. Goebel、Lukas J. Gooßen、Oleg K. Farat
DOI:10.1021/acs.joc.3c02042
日期:2024.3.1
furans can be synthesized in a single step from substituted dioxolan-5-ones by reacting with Vilsmeier–Haack reagents. These reagents are generated from POCl3 or PBr3 and DMF. The reaction cascade is mechanistically complex and involves deoxyhalogenation, iminomethylation, and electrophilic rearrangement steps, which are facilitated by the DMF solvent. The synthesis of hard-to-access 4,5,6,7-tetrahydrobenzofurans
通过与 Vilsmeier-Haack 试剂反应,可以用取代的二氧戊环-5-酮一步合成药学相关的双环呋喃。这些试剂由 POCl 3或 PBr 3和 DMF 生成。该级联反应机制复杂,涉及脱氧卤化、亚氨基甲基化和亲电重排步骤,这些步骤均由 DMF 溶剂促进。难以获得的4,5,6,7-四氢苯并呋喃和取代的脂肪族呋喃的合成特别有用。这些化合物是 2,3-二氢苯并呋喃药效团的潜在等排体,可能对药物发现感兴趣。