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
GHOSAL, S.;NIRMAL, M.;MEDINA, J. C.;KYLER, K. S., SYNTH. COMMUN., 17,(1987) N 14, 1683-1694
作者:GHOSAL, S.、NIRMAL, M.、MEDINA, J. C.、KYLER, K. S.
DOI:——
日期:——
Metal-free synthesis of chlorinated and brominated phosphinoyl 1,3-butadiene derivatives and its synthetic applications
作者:Teng Liu、Yun-Tao Xia、Jie Zhu、Ai-Min Lu、Lei Wu
DOI:10.1016/j.tetlet.2015.10.029
日期:2015.11
We report here an efficient and transition-metal free strategy for the synthesis of chlorinated and brominated phosphinoyl 1,3-butadienes and derivatives. Pre-prepared HCl/HBr solutions enabled the in situ rearrangement of phosphinoyl-α-allenic alcohols to conjugated vinyl cations, which afforded various novel polysubstituted phosphinoyl 1,3-butadienes in medium to excellent yields. The resulting products