An efficient and practical method was developed for the synthesis of tetrahydro-1H-pyrrolo[1,2-a]imidazol-2-ones based on the decarboxylative cyclization reaction of α-ketoamides and proline. In most cases, tetrahydro-1H-pyrrolo[1,2-a]imidazol-2-ones were obtained with perfect diastereoselectivity to give trans-isomer in excellent yield.
基于α-酮酰胺与脯氨酸的脱羧环化反应,开发了一种高效,实用的四氢-1 H-吡咯并[1,2 - a ]咪唑-2-酮的合成方法。在大多数情况下,以完美的非对映选择性获得四氢-1 H-吡咯并[1,2- a ]咪唑-2-酮,从而以优异的收率得到反式异构体。
Synthesis of 1,2-Fused Bicyclic Imidazolidin-4-ones by Redox-Neutral Cyclization Reaction of Cyclic Amines and α-Ketoamides
作者:Jiashou Wu、Yi Liu、Zhengneng Jin、Huajiang Jiang
DOI:10.1055/s-0036-1591951
日期:2018.5
A redox annulation reaction of cyclic amines and α-ketoamides was developed. A variety of 1,2-fused bicyclic imidazolidin-4-ones were synthesized in moderate to good yields from cyclic amines by redox-neutral α-C–H functionalization.
Selective Monoethynylation of 2‐Oxoacetamides Using Calcium Carbide as a Concise Solid Alkyne Source
作者:Yue Wang、Fei Wen、Zheng Li
DOI:10.1002/asia.202200698
日期:2022.10.4
Multifunctional compounds, 2-hydroxybut-3-ynamides, are selectively synthesized using inexpensive and easy-to-handle solidcalciumcarbide as an alkynesource instead of inflammable and explosive gaseous acetylene through monoethynylation of 2-oxoacetamides.