A novel palladium-catalyzed tandem dimerization and cyclization of acetylenic ketones. A convenient method for 3,3′-bifurans
作者:Arumugasamy Jeevanandam、Kesavaram Narkunan、Charles Cartwright、Yong-Chien Ling
DOI:10.1016/s0040-4039(99)00889-8
日期:1999.6
Alkynones undergo rearrangement in the presence of Pd(PPh3)(4) and triethylamine in tetrahydrofuran at room temperature to give 2,5-substituted furans, but under similar conditions PdCl2(PPh3)(2) by a tandem dimerization and cyclization, gives 3,3'-bifurans predominantly. (C) 1999 Elsevier Science Ltd. All rights reserved.