Zirconium-Mediated Intramolecular Coupling Reactions of Unsaturated Anilines. Diastereoselective Synthesis of Azetidines
摘要:
Imine complexes of zirconocene, generated by a beta-hydrogen abstraction process, which possess a carbon-carbon multiple bond, undergo inter-or intramolecular carbometalation to afford 1,4-cyclohexanediamine or cycloalkylaniline derivatives depending on the relative position of the unsaturated moiety with respect to the imine complex. A new diastereoselective synthesis of azetidines has been developed by treatment of azazirconacyclopentanes with iodine.
Zirconium-Mediated Intramolecular Coupling Reactions of Unsaturated Anilines. Diastereoselective Synthesis of Azetidines
摘要:
Imine complexes of zirconocene, generated by a beta-hydrogen abstraction process, which possess a carbon-carbon multiple bond, undergo inter-or intramolecular carbometalation to afford 1,4-cyclohexanediamine or cycloalkylaniline derivatives depending on the relative position of the unsaturated moiety with respect to the imine complex. A new diastereoselective synthesis of azetidines has been developed by treatment of azazirconacyclopentanes with iodine.
Trapping rhodium carbenoids with aminoalkynes for the synthesis of diverse N-heterocycles
作者:Arianne C. Hunter、Bilal Almutwalli、Anae I. Bain、Indrajeet Sharma
DOI:10.1016/j.tet.2018.06.042
日期:2018.9
A convergent approach for the synthesis of diverse N-heterocycles is described. The reaction involves trapping of diazo-derived rhodiumcarbenoids with gold activated aminoalkynes, and accommodates both the donor/acceptor (D/A) as well as acceptor/acceptor (A/A) diazo carbonyls. Mechanistic investigations indicate that the Rh(II)/Au(I) catalyzed reaction of aminoalkynes with D/A diazos is concerted
A convenient titanium-mediated intermolecular alkyne–carbonate coupling reaction
作者:Andrzej Wolan、Frédéric Cadoret、Yvan Six
DOI:10.1016/j.tet.2009.07.015
日期:2009.9
A direct diastereoselective titanium-mediated intermolecular coupling of internal alkynes with dialkyl carbonates under Kulinkovich-type reaction conditions is presented. The influence of the structures of the coupling partners on the yields and regioselectivities of this transformation is described. (C) 2009 Elsevier Ltd. All rights reserved.
Structure and Dynamic Behavior of Phosphine Gold(I)-Coordinated Enamines: Characterization of α-Metalated Iminium Ions
作者:Madhavi Sriram、Yuyang Zhu、Andrew M. Camp、Cynthia S. Day、Amanda C. Jones
DOI:10.1021/om500670z
日期:2014.8.25
Zirconium-Mediated Intramolecular Coupling Reactions of Unsaturated Anilines. Diastereoselective Synthesis of Azetidines
作者:José Barluenga、Roberto Sanz、Francisco J. Fañanás
DOI:10.1021/jo9705780
日期:1997.8.1
Imine complexes of zirconocene, generated by a beta-hydrogen abstraction process, which possess a carbon-carbon multiple bond, undergo inter-or intramolecular carbometalation to afford 1,4-cyclohexanediamine or cycloalkylaniline derivatives depending on the relative position of the unsaturated moiety with respect to the imine complex. A new diastereoselective synthesis of azetidines has been developed by treatment of azazirconacyclopentanes with iodine.