A. Jeevanandam et al., A novel palladium-catalyzed tandem dimerization and cyclization of acetylenic ketones. A convenient method for 3,3 '-bifurans, TETRAHEDR L, 40(26), 1999, pp. 4841-4844
Alkynones undergo rearrangement in the presence of Pd(PPh3)(4) and triethyl
amine 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 L
td. All rights reserved.