An iron-catalyzed three-component cyanoalkylsulfonylation of 2,3-allenoic acids, K2S2O5, and the ring-opening of cyclobutanone oximeesters is described. The radical tandem cyclization route allows access to diverse cyanoalkylsulfonylated butenolides in moderate to good yields under mild conditions. Moreover, the products are further converted, offering the corresponding derivatives.
描述了铁催化的 2,3-丙二烯酸、K 2 S 2 O 5 的三组分氰基烷基磺酰化和环丁酮肟酯的开环。自由基串联环化路线允许在温和条件下以中等至良好的产率获得各种氰基烷基磺酰化丁烯内酯。此外,产品进一步转换,提供相应的衍生产品。
Copper-Catalyzed Phosphorylation of 2,3-Allenoic Acids and Phosphine Oxide: Access to Phosphorylated Butenolides
Cu-catalyzed annulation of 2,3-allenoic acids with diphenylphosphine oxide, leading to the formation of 4-phosphate butenolides in up to 88% yield. The formation of the C–Pbond provides new avenues for the functionalization of different furan-2(5H)-ones, with favorable features such as suitable functional group tolerance and mild synthesis conditions.
我们研究了一种新型的 Cu 催化的 2,3-烯丙酸与二苯基氧化膦的环化,导致以高达 88% 的产率形成 4-磷酸丁烯内酯。C-P键的形成为不同呋喃-2( 5H )-酮的功能化提供了新的途径,具有合适的官能团耐受性和温和的合成条件等有利特征。