Photoinduced Multicomponent Synthesis of α-Silyloxy Acrylamides, an Unexplored Class of Silyl Enol Ethers
作者:Francesco Ibba、Pietro Capurro、Silvia Garbarino、Manuel Anselmo、Lisa Moni、Andrea Basso
DOI:10.1021/acs.orglett.8b00009
日期:2018.2.16
photoinduced, multicomponent reaction of α-diazoketones, silanols, and isocyanides affords α-silyloxy acrylamides, formally derived from α-keto amides. The presence of a secondary amido group makes classic preparative methods for silyl enol ethers unfeasible in this case, while the mild conditions required by this photochemical approach allow their synthesis in good yields; moreover, the general structure
α-重氮酮,硅烷醇和异氰酸酯的光诱导多组分反应,可得到形式上衍生自α-酮酰胺的α-甲硅烷氧基丙烯酰胺。在这种情况下,仲酰胺基团的存在使经典的制备甲硅烷基烯醇醚的方法不可行,而这种光化学方法所需的温和条件使其合成产率很高。此外,通过改变多组分反应的每个组分,可以容易地改变总体结构。可以利用对反应条件(即溶剂,辐射,添加剂)的微调来获得完全的Z选择性。已经研究了这种被忽视的甲硅烷基烯醇醚的反应性,并且发现了可以为新应用铺平道路的特征。