One-pot furan synthesis through diethylzinc-mediated coupling reaction between two α-bromocarbonyl compounds
作者:Ryo Hikima、Aika Takeshima、Taichi Kano
DOI:10.1039/d3ob01521a
日期:——
Polysubstituted furans were synthesized in one-pot through the Et2Zn-mediated couplingreaction between dibromoketones and monobromo carbonyl compounds and the subsequent β-elimination with bromoacetyl bromide. Polysubstituted pyrroles were also prepared in one-pot by addition of primary amines after the couplingreaction.
Efficient AgOTf or Ph3PAuCl–AgSbF6 catalyzed cyclization of 1-hydroxy-2-alkynylallylphosphonates/2-alkynylallyl alcohols to 2-furylphosphonates/2,3,5-trisubstituted furans
作者:Ramesh Kotikalapudi、K.C. Kumara Swamy
DOI:10.1016/j.tetlet.2012.04.060
日期:2012.7
The reaction of 1-hydroxy-2-alkynylallylphosphonates, synthesized by the addition of the corresponding phosphites to 2-alkynylcinnamaldehydes, under AgOTf or Ph3PAuCl-AgSbF6 catalyzed cycloisomerization afforded 2-furylphosphonates in good to excellent yields. These cyclization reactions were compared with those of 2-alkynylallyl alcohols that led to multisubstituted furans. (C) 2012 Published by Elsevier Ltd.