Rhodium-Catalyzed Domino Hydroformylation/Double-Cyclization Reaction of Arylacetylenecarboxamides: Diastereoselectivity Studies and Application in the Synthesis of 1-Azabicyclo[<i>x.y</i>
.0]alkanes
作者:Jui-Chi Tsai、Yi-Huei Lin、Guei-Tang Chen、Yu-Kai Gao、Yu-Che Tseng、Chien-Lun Kao、Wen-Hua Chiou
DOI:10.1002/asia.201801193
日期:2018.11.2
A domino method for the rapid syntheses of 1‐azabicyclo[x.y.0]alkane scaffolds, such as indolizidines, quinolizidines, decahydropyridoazepines, and their derivatives, has been developed. This strategy involved a rhodium‐catalyzed hydroformylation of allyl‐, 3‐butenyl‐, or homoallyl amides, followed by two spontaneous ring closures under mild conditions. The reaction scope and diastereoselectivity were
已经开发了一种用于快速合成1-氮杂双环[ xy .0]烷烃骨架的多米诺骨牌方法,这些骨架包括吲哚并立兹,喹唑嗪,十氢吡啶并ze庚因及其衍生物。该策略涉及烯丙基,3-丁烯基或高烯丙基酰胺的铑催化加氢甲酰化,然后在温和条件下进行两个自发的闭环反应。通过改变酰胺上的取代方式和改变碳链的长度,可以充分探索反应范围和非对映选择性。该方法用于天然生物碱他四郎胺和表柔比林的合成。两种异构酰胺底物3-丁烯酰胺1 j和高烯丙基酰胺1 i的反应性之间存在明显差异可以归因于在环化过程中从丁烯酰胺衍生而来的过渡态中更好的HOMO-LUMO重叠。DFT计算支持该解释。