Various C–C and C‐X bonds could be formed by doublefunctionalization of olefins featuring Cu‐mediated assistedtandemcatalysis. Furthermore, one‐pot indoline syntheses with o‐bromostyrenes as an application could be achieved.
Ti/Ni-Mediated Inter- and Intramolecular Conjugate Addition of Aryl and Alkenyl Halides and Triflates
作者:Irene R. Márquez、Delia Miguel、Alba Millán、M. Luisa Marcos、Luis Álvarez de Cienfuegos、Araceli G. Campaña、Juan M. Cuerva
DOI:10.1021/jo402626u
日期:2014.2.21
extent, chlorides and triflates to α,β-unsaturated carbonyls at room temperature, without requiring the previous formation of an organometallic nucleophile. The reaction proceeds inter- and intramolecularly with good functional group compatibility, which is key for the development of free protecting group methodologies. Carbo- and heterocycles of five- and six-memberedrings are obtained in good yields.
Iodine Monochloride-Amine Complexes: An Experimental and Computational Approach to New Chiral Electrophiles
作者:Jürgen Haas、Stewart Bissmire、Thomas Wirth
DOI:10.1002/chem.200500507
日期:2005.9.19
Lactonizations are important steps in many synthetic sequences. Substrate-controlled reactions that use chiral auxiliaries or chiral alkenes have already been studied in depth. This study focuses on stereoselective reagent-controlled iodolactonizations, by application of a new method that uses complexes of iodine monochloride and various donor molecules. (R)-1,2,3,4-Tetrahydro-1-naphthylamine and other amines
Copper-Catalyzed Iminoiodane-Mediated Aminolactonization of Olefins: Application to the Synthesis of 5,5-Disubstituted Butyrolactones
作者:Delphine Karila、Loïc Leman、Robert H. Dodd
DOI:10.1021/ol202436a
日期:2011.11.4
A copper(I)-catalyzed reaction of a variety of 4-aryl-pent-4-enoates with nosyliminolodane generated in situ provides the corresponding 5-aryl-5. nosylamidomethylbutyrolactones. The reaction presumably proceeds via an aziridine intermediate, which could be isolated in one case.
Nucleophilic Phosphine-Catalyzed Iodocyclization of Isoprenoids Bearing an Oxygen Terminal Group
The nucleophilic phosphine-catalyzed diastereoselective iodocyclization of linear isoprenoids bearing an oxygen terminal group was investigated. TBDMS ether of homogeraniol and TBDMS ester of homogeranic acid were successfully converted to the corresponding iodopolycyclic products in the presence of a catalytic amount of triphenylphosphine with complete diastereoselectivity.