Tris(pentafluorophenyl)borane-Catalyzed Alkylation of 1,3-Dicarbonyl Compounds with Benzylic Alcohols: Access to Oxygenated Heterocycles
作者:Chada Reddy、Jonnalagadda Vijaykumar、René Grée
DOI:10.1055/s-0030-1258214
日期:2010.11
rane has found to be an effective catalyst for the alkylation of 1,3-dicarbonyl compounds using benzylicalcohols as alkylating agents. Various 1,3-dicarbonyl compounds reacted cleanly with different benzylicalcohols to provide the corresponding monoalkylated products in good yield. In addition tris(pentafluorophenyl)borane efficiently promoted the C3 alkylation of 4-hydroxycoumarins. Further, several
A simple and efficient procedure for carbon-carbon bond formation has been developed starting from alcohols and active methylene-containing compounds usingsilica gel supportedsodiumhydrogen sulfate (NaHSO4/SiO2) under mild conditions. NaHSO4/SiO2 can be reused without loss of catalytic activity at least ten times. carbon-carbon coupling - silica gel - alcohol - supported catalysts