One-Pot Cascade Synthesis of Fused Nitrogen-Containing Heterocycles in Aqueous Media – Utility of N-Protective Groups in Intramolecular Diels–Alder Reaction of Furan
作者:Aydin Demircan、Muhammet Kandemir、Medine Colak、Muhsin Karaarslan
DOI:10.1055/s-0035-1562458
日期:——
Diels–Alder (IMDA) reaction of furan in aqueous media without the use of microwave irradiation was investigated. Protection of the amine functionality and the cycloaddition reaction were performed as a one-pot, two-component process. Various nitrogen-protecting groups and their electronic and steric effects on the cycloaddition reaction were studied. The protection–intramolecular Diels–Alder reaction sequence
摘要 研究了在不使用微波辐射的情况下,呋喃在水性介质中的无金属热分子内Diels-Alder(IMDA)反应。胺官能团的保护和环加成反应以一锅,两组分的方法进行。研究了各种氮保护基及其对环加成反应的电子和空间影响。保护-分子间Diels-Alder反应顺序在环境温和的水性条件下进行,这些条件可被具有广泛氮保护基团的底物所耐受,例如苄氧羰基(Cbz),三苯甲基,叔丁氧羰基(Boc),三氟乙酰基,甲苯磺酰基,甲磺酰基和p-壬基[(4-硝基苯基)磺酰基]。这项研究允许开发立体选择性,串联烯丙胺异构化-Diels-Alder环加成序列,从而在一个简单的一锅法中快速组装复杂的含氮杂环。 研究了在不使用微波辐射的情况下,呋喃在水性介质中的无金属热分子内Diels-Alder(IMDA)反应。胺官能团的保护和环加成反应以一锅,两组分的方法进行。研究了各种氮保护基及其对环加成反应的电子和空间影响。保护-分