Brønsted Acid-Catalyzed Cycloisomerization of But-2-yne-1,4-diols with or without 1,3-Dicarbonyl Compounds to Tri- and Tetrasubstituted Furans
作者:Srinivasa Reddy Mothe、Sherman Jun Liang Lauw、Prasath Kothandaraman、Philip Wai Hong Chan
DOI:10.1021/jo301093f
日期:2012.8.17
efficiently from cycloisomerization of but-2-yne-1,4-diols with or without 1,3-dicarbonyl compounds is described. By taking advantage of the orthogonal modes of reactivity of the alcoholic substrate through slight modification of the reaction conditions, a divergence in product selectivity was observed. At roomtemperature, p-TsOH·H2O-mediated tandem alkylation/cycloisomerization of the propargylic
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.