peroxide (DTBP)-promoted α-alkylation of α-amino carbonyl compounds by simple alkanes is developed, proceedingthrough dual sp3 C–H bonds cleavage. The reaction was applicable for α-amino ketones and α-amino esters, providing a facile pathway for the α-functionalization of these substrates. The radical pathway is involved in this transformation.
Zinc Iodide Catalyzed Synthesis of 3-Aminoimidazo[1,2-a]pyridines from 2-Aminopyridines and α-Amino Carbonyl Compounds
作者:Guosheng Huang、Xu Han、Chaowei Ma、Zhaoyang Wu
DOI:10.1055/s-0035-1560375
日期:——
concise approach to 3-aminoimidazo[1,2-a]pyridines is developed via the zinc iodide catalyzed reaction of 2-aminopyridines and α-amino carbonyl compounds in the presence of oxygen. This novel and user-friendly protocol employing diverse and easily available substrates affords the desired products in good to excellent yields. A concise approach to 3-aminoimidazo[1,2-a]pyridines is developed via the
摘要 通过在氧存在下2-氨基吡啶和α-氨基羰基化合物的碘化锌催化反应,开发了一种简单的3-氨基咪唑并[1,2- a ]吡啶的方法。这种新颖且用户友好的方案采用了多种多样且易于获得的底物,从而以良好至极佳的产量提供了所需的产品。 通过在氧存在下2-氨基吡啶和α-氨基羰基化合物的碘化锌催化反应,开发了一种简单的3-氨基咪唑并[1,2- a ]吡啶的方法。这种新颖且用户友好的方案采用了多种多样且易于获得的底物,从而以良好至极佳的产量提供了所需的产品。
Palladium-catalyzed oxidative cross-coupling for the synthesis of α-amino ketones
作者:Xiao-Hong Wei、Zhen-Hua Li、Lian-Biao Zhao、Ping Zhang、Han-Cheng Zhou、Yan-Bin Wang
DOI:10.1039/c9ra06108h
日期:——
A novel oxidative cross-couplingreaction for the synthesis of α-aryl α-amino ketones in the presence of palladiumcatalysts using T+BF4− as an oxidant has been developed. This transformation was achieved by direct C–H oxidation of α-aminocarbonyl compounds and arylation. The mild reaction has a broad reaction scope and gives desired α-aryl α-amino ketones in moderate to excellent yields.
A one-pot oxidative cross-dehydrogenative [2 + 3] annulation of α-amino ketones with α-keto esters at room temperature is reported. The protocol features copper/organo cooperative catalysis and provides densely functionalized pyrrolones in high yields. Subsequent reduction furnished multi-substituted pyrrolidinones which represent the core-structure of the natural product clausenamide, a lead molecule