Phenolate-induced intramolecular ring-opening cyclization of <i>N</i>-tosylaziridines: access to functionalized benzoxacycles
作者:Runjun Devi、Jonali Das、Bipul Sarma、Sajal Kumar Das
DOI:10.1039/c8ob01143e
日期:——
fluoride (TBAF) at room temperature. Our ability to synthesize benzoxacycle-based N-tosyl-protected amino alcohols, that are otherwise difficult to obtain by traditional synthetic routes, has opened the door to diversify the chemistry of β-amino alcohols. We also succesfully performed the Baeyer–Villiger oxidation of a salicylaldehyde ether bearing a tethered N-tosylaziridine moiety with m-CPBA followed
苯甲酸酯诱导的,非对映的和区域选择性的分子内exo -tet开环环化的N-甲苯磺酰氮丙啶是第一次。带有束缚的(邻-(叔丁基二甲基甲硅烷氧基))芳基取代基的N-甲苯磺酰氮丙啶底物,在Sharpless叠氮化条件下直接由相应的烯烃制备,提供了功能化的2,3-二氢苯并呋喃,苯并二氢吡喃和1-苯并庚烷衍生物,收率极佳。在室温下用四丁基氟化铵(TBAF)处理。我们合成基于苯并环的氮的能力甲苯磺酰基保护的氨基醇原本很难通过传统的合成途径获得,但为β-氨基醇的化学多样化开辟了大门。我们还成功地进行了带有m -CPBA的带有拴系N-甲苯磺酰基氮丙啶部分的水杨醛醚的Baeyer-Villiger氧化,随后进行串联皂化和6- exo -tet氮丙啶开环环化,提供了相应的反式-3,4-二取代-1,4-苯并二恶烷衍生物。总体而言,该研究揭示了苯并恶杂环化合物合成的新途径,也扩大了氮丙啶作为合成结构单元的影响。