Iodine(III)-Catalyzed Formal [2 + 2 + 1] Cycloaddition Reaction for Metal-Free Construction of Oxazoles
作者:Takuma Yagyu、Yusuke Takemoto、Akira Yoshimura、Viktor V. Zhdankin、Akio Saito
DOI:10.1021/acs.orglett.7b00742
日期:2017.5.19
The iodine(III) catalyst, in situ generated from iodoarene as a precatalyst with m-CPBA and Tf2NH, promoted the metal-free [2 + 2 + 1] cycloaddition-type reactions of alkynes, nitriles, and oxygen atoms for the regioselective formations of 2,4-disubstituted and 2,4,5-trisubstituted oxazole. A first example of iodine catalysis for multicomponent reactions is represented.
由碘芳烃作为原催化剂与m -CPBA和Tf 2 NH原位生成的碘(III)催化剂促进了炔烃,腈和氧原子的无金属[2 + 2 + 1]环加成反应。 2,4-二取代和2,4,5-三取代的恶唑的区域选择性形成。代表了用于多组分反应的碘催化的第一个例子。