A highly efficient and atom-economic route to synthesize 5-(1,3,4-alkatrien-2-yl)oxazolidin-2-ones via palladium-catalyzed cyclization reactions of 2,3-allenyl amines with propargylic carbonates was reported. The CO2 generated in situ from propargylic carbonates is incorporated into the oxazolidin-2-one unit with high efficiency, affording the products in 70–92% yields.
据报道,通过
钯催化的2,3-烯基胺与
碳酸炔丙基酯的环化反应,可以合成5-(1,3,4-烷基
三烯-2-基)
恶唑烷-2-酮的高效且经济的路线。由炔
丙基碳酸酯原位产生的CO 2被高效地引入到
恶唑烷-2-一单元中,从而使产物的收率达到70-92%。