Synthesis of N-substituted-4-methylene-oxazolidinones via base-catalyzed cyclization of propargylic alcohols with p-toluenesulfonyl isocyanate
作者:Shao-Feng Pi、Yue-Meng Guo、Zheng-Rui Zhou、Han-zhou Sun、Bing Yi
DOI:10.1177/1747519820907304
日期:2020.9
A practical method is developed for the synthesis of oxazolidinone derivatives, an important class of heterocyclic compounds. The effect of bases and solvents on this cyclization reaction is discussed and a simple new base–solvent system (triethylamine in toluene) is found to be the most effective. The reaction conditions developed here are mild and no by-products are observed. Moreover, using optimized
Silver-catalyzed cascade reaction of tosylmethyl isocyanide (TosMIC) with propargylic alcohols to (E)-vinyl sulfones: dual roles of TosMIC
作者:Haniya Bounar、Zhenhua Liu、Lin Zhang、Xiaoxue Guan、Zonglian Yang、Peiqiu Liao、Xihe Bi、Xingqi Li
DOI:10.1039/c5ob01129a
日期:——
An unprecedented silver-catalyzed cascade reaction of tosylmethyl isocyanide (TosMIC) with propargylicalcohols for the efficient synthesis of (E)-vinyl sulfones has been developed where TosMIC plays a dual role as both the reactant in the allenylation of propargylicalcohols and the sulfonyl source.
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.