Catalytic C−C Bond Formation Using a Simple Nickel Precatalyst System: Base‐ and Activator‐Free Direct C‐Allylation by Alcohols and Amines
作者:Joseph B. Sweeney、Anthony K. Ball、Luke J. Smith
DOI:10.1002/chem.201801241
日期:2018.5.23
A “totally catalytic” nickel(0)‐mediated method for base‐free direct alkylation of allyl alcohols and allyl amines is reported. The reaction is selective for monoallylation, uses an inexpensive NiII precatalyst system, and requires no activating reagents to be present.
A Formal [3+2] Annulation of
<i>β</i>
‐Oxoamides and 3‐Alkyl‐ or 3‐Aryl‐Substituted Prop‐2‐Ynyl Sulfonium Salts: Substrate‐Controlled Chemoselective Synthesis of Substituted
<i>γ</i>
‐Lactams and Furans
A substrate‐controlled synthesis of substituted γ‐lactams and furans has been developed via a formal [3+2] annulation of β‐oxoamides and 3‐alkyl/arylprop‐2‐ynyl sulfonium salts in the presence of cesium carbonate in a chemoselective manner. This novel protocol features easily available starting materials, mild reaction conditions, simple execution, and good to excellent yields of products.
A facile and efficient one-pot synthesis of polysubstituted pyridin-2(1H)-ones from a variety of beta-oxo amides underVilsmeierconditions is described, and a mechanism involving sequential halogenation, formylation and intramolecular nucleophilic cyclization is proposed.
Synthesis and crystal structures of palladium complexes based on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math>-amino-oximes derived from (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>R</mml:mi></mml:math>)-limonene and their application in allylic alkylation of 1,3-dioxo compounds
作者:Yasmina Homrani、Mohamed Amin El Amrani、Pauline Loxq、Frédéric Capet、Isabelle Suisse、Mathieu Sauthier
DOI:10.5802/crchim.142
日期:——
Résumés Anglais Français Coordination compounds Pd(L1)Cl 2 , Pd(L2)Cl 2 , and Pd(L3)Cl 2 have been synthesized from optically pure α-amino-oxime ligands L1–L3 based on (R)-limonene. Structures of the new palladium complexes are characterized and described by NMR spectroscopy and X-rays. These α-amino-oxime ligands were then evaluated in the palladium-catalysed allylation of 1,3-dioxo compounds. Supplementary Materials: Supplementary material for this article is supplied as a separate file: crchim-142-suppl.pdf Les complexes Pd(L1)Cl 2 , Pd(L2)Cl 2 , et Pd(L3)Cl 2 ont été synthétisés à partir des ligands α-amino-oxime L1-L3 issus du (R)-limonene. Ces nouveaux complexes de palladium ont été carractérisés par RMN et diffraction aux rayons X. Les ligands α-amino-oxime associés à des précurseurs de palladium ont été évalués sur des réactions d’alkylation allylique. Compléments : Des compléments sont fournis pour cet article dans le fichier séparé : crchim-142-suppl.pdf
摘要
Raman, Proceedings - Indian Academy of Sciences, Section A, 1958, # 47, p. 244,248