Phase-transfer-catalyzed reactions between polysulfide anions and .alpha.,.beta.-unsaturated carbonyl compounds
摘要:
Ammonium polysulfide reacts with alpha,beta-unsaturated ketones and aldehydes under PTC (phase transfer catalysis) conditions in a rather different manner than it does in homogeneous systems. 1,3-Diphenyl-2-propen-1-one (chalcone, 1) and 4-phenyl-3-buten-2-one (benzylideneacetone, 3) give sulfur-linked dimers (mainly disulfides). 3-Phenyl-2-propen-1-al (cinnamaldehyde) polymerizes. 1,5-Diphenyl-1,4-pentadien-3-one (dibenzylideneacetone, 7) gives the known six-membered ring thianones and new seven-membered ring 1,2-dithiepanones 9 along with a polymer. Carvone gives a disulfide dimer that converts to a mixture of bicyclic sulfur-containing compounds. Sodium polysulfide is much less effective because of the base-induced decomposition of either the products or the intermediates. Sodium sulfide reacts in the same manner as it does in homogenous systems.
LALONDE, R. T.;FLORENCE, R. A.;HORENSTEIN, B. A.;FRITZ, R. C.;SILVEIRA, L+, J. ORG. CHEM., 1985, 50, N 1, 85-91
作者:LALONDE, R. T.、FLORENCE, R. A.、HORENSTEIN, B. A.、FRITZ, R. C.、SILVEIRA, L+
DOI:——
日期:——
Phase-transfer-catalyzed reactions between polysulfide anions and .alpha.,.beta.-unsaturated carbonyl compounds
作者:Eitan B. Krein、Zeev Aizenshtat
DOI:10.1021/jo00074a043
日期:1993.10
Ammonium polysulfide reacts with alpha,beta-unsaturated ketones and aldehydes under PTC (phase transfer catalysis) conditions in a rather different manner than it does in homogeneous systems. 1,3-Diphenyl-2-propen-1-one (chalcone, 1) and 4-phenyl-3-buten-2-one (benzylideneacetone, 3) give sulfur-linked dimers (mainly disulfides). 3-Phenyl-2-propen-1-al (cinnamaldehyde) polymerizes. 1,5-Diphenyl-1,4-pentadien-3-one (dibenzylideneacetone, 7) gives the known six-membered ring thianones and new seven-membered ring 1,2-dithiepanones 9 along with a polymer. Carvone gives a disulfide dimer that converts to a mixture of bicyclic sulfur-containing compounds. Sodium polysulfide is much less effective because of the base-induced decomposition of either the products or the intermediates. Sodium sulfide reacts in the same manner as it does in homogenous systems.
Variable reaction pathways for the action of polysulfide on Michael acceptors
作者:Robert T. LaLonde、Robert A. Florence、Benjamin A. Horenstein、Richard C. Fritz、Linda Silveira、Jon Clardy、Bala S. Krishnan