Access to 1,3-oxazine-2,4-diones/1,3-thiazine-2,4-diones <i>via</i> organocatalytic CO<sub>2</sub>/COS incorporation into allenamides
作者:Hui Zhou、Rui Wang、Hui Zhang、Wei Chen、Xiao-Bing Lu
DOI:10.1039/c9ob02398d
日期:——
Lewis base-CO2/COS adducts were firstly studied as organocatalysts for [4 + 2] annulation of CO2/COS with allenamides to selectively synthesize 1,3-oxazine-2,4-diones/1,3-thiazine-2,4-diones.
Silver-Catalyzed Cross-Coupling of Propargylic Alcohols with Isocyanides: An Atom-Economical Synthesis of 2,3-Allenamides
作者:Jianquan Liu、Zhenhua Liu、Nannan Wu、Peiqiu Liao、Xihe Bi
DOI:10.1002/chem.201304255
日期:2014.2.17
Cross‐coupling reactions between propargylicalcohols and isocyanides, by means of silver catalysis, have been described. This new reaction is both atom and step efficient and is applicable to a broad scope of substrates, allowing the synthesis of a range of synthetically valuable 2,3‐allenamides in moderate to excellent yields.