A palladium-catalyzed three component cascade S-transfer reaction of acetylinic oximes with aryl halides using readily available Na2S2O3 as an odorless sulfenylation reagent under aerobic conditions in ionic liquids was described. The present protocol features environmental friendliness, good functional group compatibility, odorless sulfenylation reagents, without any ligand or additive, and excellent
描述了在有氧条件下在离子液体中使用易于获得的Na 2 S 2 O 3作为无味的亚磺酰基化试剂,炔属肟与芳基卤化物进行钯催化的三组分级联S转移反应。本协议的特点是环境友好,良好的官能团相容性,无味的亚磺酰化试剂,无需任何配体或添加剂,并且原子和步骤经济性极佳。值得注意的是,该级联程序将为合成和药物化学中结构复杂的异恶唑支架的构建带来进一步的后期修饰。
Palladium‐Catalyzed Cascade Desulfitative Arylation of Acetylinic Oximes with Sodium Arylsulfinates
An efficient and practical palladium-catalyzed aerobic desulfitative arylation of acetylinic oximes with sodiumarylsulfinates under oxygen atmosphere in ionic liquid for the assembly of structurally diverse 4-aryl isoxazoles is accomplished. In the presence of 0.5 mol % of IPr-Pd-Im-Cl2, both the acetylinic oximes and sodiumarylsulfinates are well tolerated.
palladium-catalyzed cascad cyclization/alkenylation of ynone oximes with various vinylsilane agents for the assembly of synthetically valuable isoxazolyl vinylsilane derivative has been accomplished. Under the optimized conditions, a wide array of ynone oximes can be efficiently converted into the isoxazolyl vinylsilanes in moderate to good yields with eminent functional group compatibility.