我们报告说,氮杂环可以在钯催化的乙烯基氮丙啶动态动力学不对称烷基化中作为有能力的亲核试剂。得到的烷基化产物具有高区域选择性、化学选择性和对映选择性。取代的 1H-吡咯和 1H-吲哚都被成功地用于得到支化的 N-烷基化产物。通过将该方法应用于制备几种药物化学先导化合物和溴吡咯生物碱,包括 longamide B、longamide B 甲酯、hanishin、agesamides A 和 B 以及环碘酮,证明了该方法的合成效用。
Reaction of Vinyl Aziridines with Arynes: Synthesis of Benzazepines and Branched Allyl Fluorides
作者:Sherif J. Kaldas、Eva Kran、Christian Mück‐Lichtenfeld、Andrei K. Yudin、Armido Studer
DOI:10.1002/chem.201904727
日期:2020.2.3
on the reaction conditions and the choice of the aryne precursor, the aziridinium intermediate can be trapped through two distinct mechanistic pathways. The first one proceeds through a formal [5+2] cycloaddition to furnish valuable multi-substituted benzazepines. In the second pathway, the aziridinium is intercepted by a fluoride ion to afford allylic fluorides in good yields. Both reactions proceed