Copper-Catalyzed Diamination of Alkenes of Unsaturated Ketohydrazones with Amines
作者:Manman Chen、Li-Jing Wang、Pei-Xing Ren、Xiao-Ying Hou、Zhang Fang、Meng-Nan Han、Wei Li
DOI:10.1021/acs.orglett.7b03401
日期:2018.2.2
A convenient copper-catalyzed intra-/intermoleculardiamination of β,γ-unsaturated hydrazones has been developed with simple amines as external amine sources. The protocol enables efficient access to various nitrogen-containing pyrazolines under mild reaction conditions.
Graphite intercalation compounds as precursors of activated metals
作者:P. Marceau、L. Gautreau、F Béguin、G. Guillaumet
DOI:10.1016/0022-328x(91)83083-g
日期:1991.2
compound was used as metallic agent for the synthesis of various ν,γ-unsaturated ketones from nitriles and a allylichalide. In aromatic series, the reaction is not influenced by the groups present on the ring of the nitrile. The most striking feature of the reaction is that the chloro and bromo parent reagents have comparable reactivities; this is attributed to the fact that the reaction of the activated
An efficient N-centred radical 5-exo cyclization/addition/aromatization cascade by cooperative visible light photoredox and cobalt catalysis is described, giving dihydropyrazole-fused benzosultams in satisfactory yields.
[EN] ORGANOZINC REAGENTS AND PROCESSES FOR PREPARING AND USING THE SAME<br/>[FR] RÉACTIFS ORGANOZINCIQUES ET LEURS PROCÉDÉS DE PRÉPARATION ET D'UTILISATION
申请人:UNIV MUENCHEN LUDWIG MAXIMILIANS
公开号:WO2016146689A1
公开(公告)日:2016-09-22
Provided is an organozinc composition comprising (a) an organozinc complex carrying an allylic ligand, (b) a magnesium component and (c) a lithium component. The organozinc composition is useful as a synthetic intermediate with excellent reactivity and selectivity, and can be stored for extended periods of time without loss of activity. Moreover, a process for the preparation of the organozinc composition and synthetic procedures making use of the organozinc composition are provided.
Hydrazonyl Radical-Participated Tandem Reaction: A Strategy for the Synthesis of Pyrazoline-Functionalized Oxindoles
作者:Xiao-Yong Duan、Xiu-Long Yang、Pan-Pan Jia、Man Zhang、Bing Han
DOI:10.1021/acs.orglett.5b03003
日期:2015.12.18
efficient and practical tandem cyclization/addition/cyclization strategy is developed for the initial generated hydrazonylradicals derived from the oxidation of β,γ-unsaturatedhydrazones. By using this protocol, structurally novel pyrazoline-functionalized oxindoles are prepared by the reaction of easily accessible β,γ-unsaturatedhydrazones with N-aryl acrylamides under the metal- and solvent-free conditions