A heterogeneous gold(I)-catalyzed regioselective hydration of propargyl acetates toward α-acyloxy methyl ketones
作者:Yingying Du、Fang Yao、Rongli Zhang、Mingzhong Cai
DOI:10.1016/j.jorganchem.2020.121136
日期:2020.3
heterogeneous gold(I)-catalyzed regioselective hydration of propargylacetates has been developed that proceeds smoothly in 1,4-dioxane at room temperature in the presence of 1 mol% diphenylphosphine-modified MCM-41-anchored gold(I) complex [Ph2P-MCM-41-AuSbF6] as catalyst and provides an efficient and practical approach for the synthesis of a variety of α-acyloxy methyl ketones with high atom economy
Regioselective Synthesis of Multifunctional Allylic Amines; Access to Ambiphilic Aziridine Scaffolds
作者:Dean D. Roberts、Mark G. McLaughlin
DOI:10.1021/acs.orglett.1c01398
日期:2021.6.4
propargylic amines. The reaction utilizes a PtCl2/XantPhos catalyst system to deliver hydrosilanes across the alkyne to afford multifunctional allylic amines in high yields. The reaction is tolerant to a wide variety of functional groups and provides high value intermediates with two distinct functional handles. The synthetic applicability of the reaction has been shown through the synthesis of diverse ambiphilic
Asymmetric Synthesis of Hydroquinolines with α,α‐Disubstitution through Organocatalyzed Kinetic Resolution
作者:Yunrong Chen、Chaofan Zhu、Zheng Guo、Wei Liu、Xiaoyu Yang
DOI:10.1002/anie.202015008
日期:2021.3
The first kinetic resolution of hydroquinoline derivatives with α,α‐disubstitution has been achieved through asymmetric remote aminations with azodicarboxylates enabled by chiral phosphoric acid catalysis. Mechanistic studies suggest a monomeric catalyst pathway proceeding through rate‐ and enantio‐determining electrophilic attack promoted by a network of attractive non‐covalent interactions between
Ruthenium‐Catalyzed Synthesis of Functionalized Dienes from Propargylic Esters: Formal Cross‐Coupling of Two Carbenes
作者:Chloé Vovard‐Le Bray、Sylvie Dérien、Pierre H. Dixneuf
DOI:10.1002/anie.200805031
日期:2009.2.9
Cross‐couplingcarbenes: The coupling of a propargylicester with a diazoalkane in the presence of [RuCl(cod)Cp*] catalyst leads to the formation of functionalized conjugated dienes with high stereoselectivity. The reaction involves the cross‐coupling of a vinylcarbene fragment, arising from a ruthenium‐catalyzedpropargylicester rearrangement, with a diazoalkane carbene.