Platinum-catalyzed reductive coupling of activated alkenes under hydrogenation conditions
摘要:
The Pt complex generated from PtCl(2), PR(3), and SnCl(2) catalyzes the reductive coupling of activated alkenes under environmentally benign hydrogenation conditions. Various bis-enones participated in the intramolecular cyclization, forming the desired cyclization products in moderate to good yield. Intermolecular reductive coupling of the enone and the aldehyde provided the coupling product in good yield. This methodology illustrates the first use of platinum complexes in hydrogen-mediated couplings of activated alkenes. (C) 2008 Elsevier Ltd. All rights reserved.
KOVER, W. BRUCE;JUNIOR, JOEL JONES;DE, AGUIAR ALCINO P.;LUIZA, MARIA;HOLL+, TETRAHEDRON, 43,(1987) N 14, 3199-3204
作者:KOVER, W. BRUCE、JUNIOR, JOEL JONES、DE, AGUIAR ALCINO P.、LUIZA, MARIA、HOLL+
DOI:——
日期:——
Methods of cyclization of some δ-diketones
作者:W.Bruce Kover、Joel Jones Junior、Alcino P. De Aguiar、Maria Luiza A. von Holleben
DOI:10.1016/s0040-4020(01)90287-x
日期:1987.1
PHOTOCHEMICAL SYNTHESES: 6. THE FORMATION OF HEPTANDIONES FROM ACETYLACETONE AND ALKENES
作者:P. De Mayo、H. Takeshita
DOI:10.1139/v63-061
日期:1963.2.1
The irradiation of acetylacetone in the presence of oct-1-ene, cyclopentene, cyclohexene, and 1-methylcyclohexene gives substituted heptandiones. These diketones may then be cyclized with acid or base. Irradiation of isopropenyl acetate and acetylacetone gives, after cyclization, m-5-xylenol. The mechanism of the reaction is discussed: it represents the first cycloaddition to an isolated ethylenic
Platinum-catalyzed reductive coupling of activated alkenes under hydrogenation conditions
作者:Harim Lee、Min-Soo Jang、Jong-Tai Hong、Hye-Young Jang
DOI:10.1016/j.tetlet.2008.07.117
日期:2008.9
The Pt complex generated from PtCl(2), PR(3), and SnCl(2) catalyzes the reductive coupling of activated alkenes under environmentally benign hydrogenation conditions. Various bis-enones participated in the intramolecular cyclization, forming the desired cyclization products in moderate to good yield. Intermolecular reductive coupling of the enone and the aldehyde provided the coupling product in good yield. This methodology illustrates the first use of platinum complexes in hydrogen-mediated couplings of activated alkenes. (C) 2008 Elsevier Ltd. All rights reserved.