Nickel-Catalyzed Decarboxylative Difluoroalkylation of α,β-Unsaturated Carboxylic Acids
作者:Gang Li、Tao Wang、Fan Fei、Yi-Ming Su、Yan Li、Quan Lan、Xi-Sheng Wang
DOI:10.1002/anie.201511321
日期:2016.3.1
The first example of nickel‐catalyzed decarboxylative fluoroalkylation of α,β‐unsaturated carboxylic acids has been developed with commonly available fluoroalkyl halides. This novel transformation has demonstrated broad substrate scope, excellent functional‐group tolerance, mild reaction conditions, and excellent stereoselectivity. Mechanistic investigations indicate that a fluoroalkyl radical is involved
Dual Nickel/Ruthenium Strategy for Photoinduced Decarboxylative Cross-Coupling of α,β-Unsaturated Carboxylic Acids with Cycloketone Oxime Esters
作者:Xiao-Yu Lu、Ze-Jie Xia、Ang Gao、Qi-Le Liu、Run-Chuang Jiang、Chuang-Chuang Liu
DOI:10.1021/acs.joc.1c00726
日期:2021.7.2
Herein, a dual nickel/ruthenium strategy is developed for photoinduced decarboxylative cross-coupling between α,β-unsaturatedcarboxylicacids and cycloketone oxime esters. The reaction mechanism is distinct from previous photoinduced decarboxylation of α,β-unsaturatedcarboxylicacids. This reaction might proceed through a nickelacyclopropane intermediate. The C(sp2)–C(sp3) bond constructed by the
Antimalarials. Synthesis and antimalarial activity of 1-(4-methoxycinnamoyl)-4-(5-phenyl-4-oxo-2-oxazolin-2-yl)piperazine and derivatives
作者:Thomas R. Herrin、Jeanne M. Pauvlik、Evelyn V. Schuber、Adolph O. Geiszler
DOI:10.1021/jm00246a009
日期:1975.12
The preparation and activity against Plasmodium berghei of derivatives of 1-(4-methoxycinnamoyl)-4-(5-phenyl-4-oxo-2-oxazolin-2-yl)piperazine are described. Replacement of the cinnamoyl group was accomplished by acylation or alkylation of 1-(5-phenyl-4-oxo-2-oxazolin-2-yl)piperazine. Modifications of the 5-phenyl group were prepared either by a sequence of reactions involving mandelic ester-pemoline-piperazine
Palladium(II)-Catalyzed Oxidative Decarboxylative [2 + 2 + 1] Annulation of Cinnamic Acids with Alkynes: Access to Polysubstituted Pentafulvenes
作者:Shiyong Peng、Nuan Chen、Hong Zhang、Min He、Hongguang Li、Ming Lang、Jian Wang
DOI:10.1021/acs.orglett.0c01955
日期:2020.7.17
An unprecedented palladium(II)-catalyzed oxidative decarboxylative [2 + 2 + 1] annulation of cinnamic acids with alkynes has been developed for the synthesis of polysubstituted pentafulvenes. Ag2CO3 and DMSO are essential for the reaction. This protocol features readily available starting materials, a wide substrate scope, and moderate to excellent yields. Moreover, various significant frameworks can
已开发出前所未有的钯(II)催化的肉桂酸与炔烃的氧化脱羧[2 + 2 +1]环合反应,用于合成多取代的五烯酮。Ag 2 CO 3和DMSO对反应至关重要。该协议的特点是容易获得的起始原料,广泛的底物范围以及中等至极好的产率。而且,可以通过氧化,还原和Scholl型反应从五烯丙基戊烯的后期转化中容易地获得各种重要的构架。