Intramolecular Fe(II)-Catalyzed N−O or N−N Bond Formation from Aryl Azides
作者:Benjamin J. Stokes、Carl V. Vogel、Linda K. Urnezis、Minjie Pan、Tom G. Driver
DOI:10.1021/ol101040p
日期:2010.6.18
Iron(II) bromide catalyzes the transformation of aryl and vinyl azides with ketone or methyl oxime substituents into 2,1-benzisoxazoles, indazoles, or pyrazoles through the formation of an N−O or N−N bond. This transformation tolerates a variety of different functional groups to facilitate access to a range of benzisoxazoles or indazoles. The unreactivity of the Z-methyloxime indicates that N-heterocycle
溴化铁 (II) 催化具有酮或甲基肟取代基的芳基和乙烯基叠氮化物通过形成 N-O 或 NN 键而转化为 2,1-苯并异恶唑、吲唑或吡唑。这种转化可耐受多种不同的官能团,以促进获得一系列苯并异恶唑或吲唑。 Z-甲基肟的不反应性表明,N-杂环的形成是通过酮或肟对活化的平面叠氮化铁络合物的亲核攻击而发生的。
Copper‐Catalyzed Enantioselective Doyle–Kirmse Reaction of Azide‐Ynamides via α‐Imino Copper Carbenes
作者:Xin Liu、Li‐Gao Liu、Can‐Ming Chen、Xiao Li、Zhou Xu、Xin Lu、Bo Zhou、Long‐Wu Ye
DOI:10.1002/anie.202216923
日期:2023.3
A novel copper-catalyzed asymmetric Doyle-Kirmse of azide-ynamides via α-imino copper carbenes is disclosed, enabling the practical and divergent assembly of chiral [1,4]thiazino [3,2-b]indoles in generally moderate to excellent yields and excellent enantioselectivities. This protocol represents the first asymmetric Doyle–Kirmse reactionvia a non-diazo approach and the first asymmetric [2,3]-sigmatropic