Micellar Solution of Sodium Dodecyl Sulfate (SDS) Catalyzes Facile Michael Addition of Amines and Thiols to ?,?-Unsaturated Ketones in Water under Neutral Conditions
作者:H. Firouzabadi、N. Iranpoor、A.?A. Jafari
DOI:10.1002/adsc.200404348
日期:2005.4
Sodiumdodecylsulfate (SDS) catalyzesfacileMichaeladditions of amines and thiols to α,β-unsaturated ketonesunderneutralmicellarconditions to afford the corresponding Michael adducts in good to high yields.
Highly efficient and environmentally benign aza-Michaeladditions of amines to α,β-unsaturated compounds catalyzed by β-cyclodextrin in water to produce the corresponding β-amino compounds in excellent yields under mild conditions are described. β-Cyclodextrin can be recovered and reused in subsequent reactions without loss of activity.
Direct Access to Isotopically Labeled Aliphatic Ketones Mediated by Nickel(I) Activation
作者:Aske S. Donslund、Simon S. Pedersen、Cecilie Gaardbo、Karoline T. Neumann、Lee Kingston、Charles S. Elmore、Troels Skrydstrup
DOI:10.1002/anie.201916391
日期:2020.5.18
An extensive range of functionalized aliphaticketones with good functional-group tolerance has been prepared by a NiI -promoted coupling of either primary or secondary alkyl iodides with NN2 pincer NiII -acyl complexes. The latter were easily accessed from the corresponding NiII -alkyl complexes with stoichiometric CO. This Ni-mediated carbonylative coupling is adaptable to late-stage carbon isotope
Improved Heteroatom Nucleophilic Addition to Electron-Poor Alkenes Promoted by CeCl<sub>3</sub>·7H<sub>2</sub>O/NaI System Supported on Alumina in Solvent-Free Conditions
environmental consciousness in chemical research, the solvent-freeMichaeladdition has attracted our attention. In continuation of our ongoing program to develop synthetic protocols utilizing cerium trichloride, we report an extension of the CeCl3·7H2O/NaI combination supported undersolvent-freeconditions to promote heteroatom Michaeladdition. Using neutral alumina (Al2O3) as solid support permits us
杂原子亲核试剂与强吸电子基团共轭的碳-碳双键的共轭加成是合成有机化学中最重要的新成键策略之一。在这些迈克尔加成方法中,路易斯酸已显示出最佳的启动子活性,特别是,浸渍在无机载体上的试剂的使用正在迅速增加。随着化学研究中环境意识的增强,无溶剂迈克尔的加入引起了我们的关注。在我们正在进行的利用三氯化铈开发合成方案的计划的继续中,我们报告了CeCl 3 ·7H 2的扩展O / NaI组合在无溶剂条件下得到支持,以促进杂原子迈克尔的加成。使用中性氧化铝(Al 2 O 3)作为固体载体可以避免某些与无机载体为硅胶的过程相关的问题。CeCl 3 ·7H 2 O / NaI / Al 2 O 3该系统对于利用弱亲核试剂(例如咪唑和氨基甲酸酯)的杂配迈克尔加成反应很好,并且在不同于α,β-不饱和羰基化合物的迈克尔受体的情况下,反应也以良好的收率进行。该方法的重要合成应用是生产4-哌啶酮衍生物时的分子内氮杂-
Palladium-Catalyzed Aerobic Oxidative Coupling of Allylic Alcohols with Anilines in the Synthesis of Nitrogen Heterocycles
with anilines to afford β-amino ketones which are converted into substituted quinolines in a one-pot fashion. The exclusive preference for N-alkylation over N-allylation makes this approach unique when compared to those reported in literature. Detailed mechanistic investigations reveal that the conjugate addition pathway was the predominant one over the allylic amination pathway. The notable aspects of